ESL2500 Manual 2711E ESL 2501 Fire Alarm Control Panel Install & Operations 1997

2015-08-27

: InterLogix Esl 2501 Fire Alarm Control Panel Install & Operations Manual 1997 ESL 2501 Fire Alarm Control Panel_Install & Operations Manual_1997 library

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I N S T A L L A T I O N

A N D

O P E R A T I O N S

M A N U A L

ESL 2501
Fire Alarm Control Panel

ESL
a pArPRODUCT
oduct o
f SENTR
s e n t OL
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OF

Sentrol 1-800-547-2556

TABLE OF CONTENTS
1.0 SYSTEM OVERVIEW ......................................................................................................... 6
1.1 Features .................................................................................................................................................................. 6
1.2 Panel Equipment ..................................................................................................................................................... 7
1.3 Panel Listings ........................................................................................................................................................... 7
1.4 Customized Panels ................................................................................................................................................... 8

2.0 SYSTEM CONFIGURATIONS .............................................................................................. 8
2.1 2501 (FACP) ............................................................................................................................................................ 8
2.2 Power Boost ............................................................................................................................................................ 9
2.3 System Networking ................................................................................................................................................. 9
2.4 Door Holders ........................................................................................................................................................ 10
2.5 Low Battery Annunciation ..................................................................................................................................... 10
2.6 Hibernation Mode ................................................................................................................................................. 10
2.7 Drill Test ................................................................................................................................................................ 10
2.8 Trouble Resound Time ........................................................................................................................................... 10
2.9 Comm Test ............................................................................................................................................................ 10
2.10 Dual LRM Operation ............................................................................................................................................ 10
2.11 Ground Fault Indication Operation ...................................................................................................................... 11

3.0 GENERAL SYSTEM INSTALLATION GUIDELINES ............................................................... 18
3.1 General Installation Procedure ............................................................................................................................... 18
3.2 BMB Operation Verification .................................................................................................................................... 20
3.3 ZEM Address Selection ........................................................................................................................................... 21
3.4 Zone Function Jumpers ......................................................................................................................................... 22
3.5 Add-On Modules for Expanded Capabilities ............................................................................................................ 22
3.6 2500 Keypad Address Settings ............................................................................................................................... 23
3.7 2500-DAC ............................................................................................................................................................. 23
3.8 2500-RA and 2500-RADVR ..................................................................................................................................... 23
3.9 2500-LEM/LRM ...................................................................................................................................................... 24
3.10 Installing the ZEM, BMB, and DAC ....................................................................................................................... 29
3.11 Installing the BELL, ZRM and LEM/LRM ................................................................................................................. 30
3.12 Installing the Zone Description Card .................................................................................................................... 31

4.0 FIELD WIRING ............................................................................................................... 32
4.1 Detail Installation Guide ......................................................................................................................................... 34
4.2 Field Wiring Checkout Procedures .......................................................................................................................... 37
4.3 Alarm Initiating Devices .......................................................................................................................................... 37
4.3.1 Two-Wire Smoke Detectors .......................................................................................................................... 37
4.3.2 Four-Wire Smoke Detectors .......................................................................................................................... 37
4.3.3 Sprinkler System Waterflow and Supervisory Devices .................................................................................... 38
4.4 Alarm Notification Appliances ................................................................................................................................. 38
4.5 Zone Expansion Module (ZEM) Connection ........................................................................................................... 38
4.5.1 ESL 2502A-ZEM ........................................................................................................................................... 38
4.5.2 ESL 2502-ZEM and ESL 2504-ZEM ............................................................................................................... 38
4.6 Supplementary Contacts Connection ..................................................................................................................... 39
4.6.1 Supplementary Alarm Contacts .................................................................................................................... 39
4.6.2 Supplementary Trouble Contacts .................................................................................................................. 39
4.6.3 Zone Relay Module (ZRM) ............................................................................................................................ 39
4.7 Connection to Supervising Station Fire Alarm Systems ............................................................................................ 39
4.7.1 Connecting the 2500-DAC .......................................................................................................................... 39

5.0 PROGRAMMING ............................................................................................................. 41
5.1 Introduction .......................................................................................................................................................... 41
5.1.1 Programming Indicators .............................................................................................................................. 41
5.1.2 Programming Buttons ................................................................................................................................. 41

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5.2 System Programming ............................................................................................................................................. 41
5.3 Time & Date Programming .................................................................................................................................... 42
5.4 Battery Saver Programming ................................................................................................................................... 43
5.5 CleanMe® Mode Programming .............................................................................................................................. 43
5.6 BMB Programming Matrix ...................................................................................................................................... 44
5.6.1 DAC Programming Matrix ............................................................................................................................. 55
5.7 Function Map Description...................................................................................................................................... 57
5.7.1 ZRM Override ............................................................................................................................................... 57

6.0 INITIAL ACCEPTANCE TESTING ....................................................................................... 58
6.1 Alarm Zone Testing ................................................................................................................................................ 58
6.2 Notification Appliance Circuit Testing ...................................................................................................................... 61
6.3 Ground Fault Test .................................................................................................................................................. 62
6.4 System Testing Using Test Modes ............................................................................................................................ 62
6.5 Remote Keypad Check-Out .................................................................................................................................... 63
6.6 BMP Lamp Test ...................................................................................................................................................... 63
6.7 Digital Alarm Communicator Check-Out ................................................................................................................. 63
6.8 LEM/LRM Check-Out .............................................................................................................................................. 63

7.0 INSPECTION AND TESTING ............................................................................................ 64
7.1 Maintenance ......................................................................................................................................................... 64
7.1.1 Batteries ....................................................................................................................................................... 64

8.0 PRECAUTIONS AND WARNINGS ..................................................................................... 64
9.0 TROUBLESHOOTING ...................................................................................................... 64
10.0 HOUSEHOLD FIRE WARNING SYSTEMS ........................................................................ 66
10.1 Installation ........................................................................................................................................................... 66
10.2 Detector Location ................................................................................................................................................ 66
10.3 Notification Appliance Location ............................................................................................................................ 66
10.4 Escape Plan ......................................................................................................................................................... 66
10.5 Household Fire Warning System Maintenance ..................................................................................................... 66

11.0 PANEL SPECIFICATIONS ............................................................................................... 68
11.1 General .............................................................................................................................................................. 68
11.2 2500-BMB - Basic Master Board ......................................................................................................................... 68
11.3 2500-ZEM - Zone Expander Module ................................................................................................................. 68
11.4 2500-ZRM - Zone Relay Module ........................................................................................................................ 68
11.5 2500-BELL - Bell Expander Module .................................................................................................................... 68
11.6 Power Booster .................................................................................................................................................... 68
11.7 2500 LEM/LRM .................................................................................................................................................... 68
11.8 2500-RA .............................................................................................................................................................. 69
11.9 2500-RADVR ....................................................................................................................................................... 69
11.10 2500-DAC ......................................................................................................................................................... 69

APPENDIX A COMPATIBLE EQUIPMENT ............................................................................... 70
APPENDIX B BATTERY CALCULATION WORKSHEET ............................................................. 73
APPENDIX C 2501 (FACP) OPERATING INSTRUCTIONS .......................................................... 79

This manual does not cover, nor does it purport to cover, every detail that might pertain to the ESL 2501 Fire Alarm
Control Panel; nor does it cover, or purport to cover, every possible contingency that might be encountered in
connection with the installation, utilization, operation or maintenance of the ESL 2501 Fire Alarm Control Panel.
This manual is intended only to advise the user of the intended use of the unit and the intended means by which it
can be used to implement a fire alarm system design for commercial, institutional and residential applications.
Consult Sentrol Technical Services at 1-800-648-7424 regarding any condition, question or concern not explicitly
covered in this manual.

Sentrol 1-800-547-2556

TABLE OF CHARTS, GRAPHICS AND SCHEMATICS
Figure 1.3 Signaling System Table ................................................................................................................................. 7
Figure 1.4 Custom Panel Building Table ........................................................................................................................ 8
Figure 2.2 Power Boost Installation Diagram ............................................................................................................... 12
Figure 2.3a Slave Panel Installation Diagram ............................................................................................................... 13
Figure 2.3b Slave Panel Installation with a ZEM Diagram ............................................................................................. 14
Figure 2.3c Slave Panel with Power Boost Installation Diagram .................................................................................... 15
Figure 2.4 Door Holder Installation Diagram ............................................................................................................... 16
Figure 2.10 Dual LRM Installation Diagram ................................................................................................................... 17
Figure 3.0 2501 (FACP) Interconnect Diagram ............................................................................................................ 25
Figure 3.1a Panel Standoff with Locking Clip ............................................................................................................... 19
Figure 3.1b Internal Panel Configuration with DAC ..................................................................................................... 26
Figure 3.1c Internal Panel Configuration with LEM/LRM .............................................................................................. 27
Figure 3.2a BMB Daughter Board Layout .................................................................................................................... 20
Figure 3.2b BMB Daughter Board LED Table ............................................................................................................... 20
Figure 3.2c Additional System Troubles ........................................................................................................................ 21
Figure 3.2d System Troubles Indicated by the ESL 2500 Keypad .................................................................................. 21
Figure 3.3 ZEM Address Selection Chart ...................................................................................................................... 21
Figure 3.4 Function Jumper Diagram ......................................................................................................................... 28
Figure 3.5a Peripheral Device Guidelines Table ........................................................................................................... 22
Figure 3.5b Connecting BMB to Keypad ..................................................................................................................... 22
Figure 3.5c Connecting BMB to RA/RADVR ................................................................................................................. 22
Figure 3.5d Connecting BMB to LEM/LRM ................................................................................................................... 23
Figure 3.5e Connecting BMB to ZXPTR ....................................................................................................................... 23
Figure 3.6 2500 Keypad Address Switch Settings ......................................................................................................... 23
Figure 3.8 2500-RA/RADVR Address Switch Settings .................................................................................................... 23
Figure 3.10 ZEM, BMB, and DAC Installation Diagram ................................................................................................. 29
Figure 3.11 BELL, ZRM and LEM/LRM Installation Diagram .......................................................................................... 30
Figure 3.12 Zone Description Card Diagram ............................................................................................................... 31
Figure 4.0a Class B System Installation Diagram without ZEM ...................................................................................... 32
Figure 4.0b Class B System Installation Diagram with ZEM ........................................................................................... 33
Figure 4.1a Power-Limited Routing with DAC .............................................................................................................. 34
Figure 4.1b Power-Limited Routing with LEM/LRM ...................................................................................................... 35
Figure 4.1c Wire Resistance Table ................................................................................................................................ 36
Figure 4.1d Alarm Notification Appliance Circuit (NAC) Wire Size Table ......................................................................... 36
Figure 4.1e Unified Earth Ground ............................................................................................................................... 37
Figure 4.7.1 2500-DAC Installation Diagram ............................................................................................................... 40
Figure 5.1a BMB Daughter Board Layout .................................................................................................................... 41
Figure 5.1b On-Board Programming Interface ............................................................................................................. 41
Figure 5.3 Time & Date Programming Example ........................................................................................................... 42
Figure 5.6 LED Location Diagram for Programming Location and Programmed Value ................................................. 43
Figure 9.0 Troubleshooting Guide ............................................................................................................................... 65
Figure 10.0a Detector Location - 3 Sleeping Areas ....................................................................................................... 67
Figure 10.0b Detector Location - Per Floor .................................................................................................................. 67
Figure 10.0c Detector Location - Ceiling/Wall Mount .................................................................................................. 67
Figure A.1 UL Listed Non-Coded Manual Alarm Stations and Heat Detectors ................................................................ 70
Figure A.2 UL Listed Four-Wire Smoke Detectors .......................................................................................................... 70
Figure A.3 Two-Wire Smoke Detector Compatibility ..................................................................................................... 71
Figure A.4 2501 (FACP) Compatible Indicating Devices................................................................................................ 72
Figure A.5 Ordering Information Table ........................................................................................................................ 72
Figure B.1 Battery Calculation Worksheet .................................................................................................................... 73

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1.0

1.1 FEATURES

SYSTEM OVERVIEW
The ESL Model 2501 Fire Alarm Control Panel (FACP) is
designed to provide a reliable and cost-effective means of
implementing a fire alarm system compliant with the
requirements of the National Fire Alarm Code for protected premises fire alarm systems in commercial,
industrial, residential and institutional applications. The
ESL Model 2501 Fire Alarm Control Panel is a modular
system. In its simplest configuration, called the 2501
FACP, it consists of an enclosure, power supply and Basic
Master Board (BMB). The 2501 provides all of the
required basic system functions for alarm, fault (trouble)
and supervisory monitoring, together with one initiating
zone circuit and two notification appliance circuits. Its 7
amp, 24 VDC, system power supply provides ample
current for most applications; with 1.5 amps available
from each of the two integral notification appliance
circuits, 1.0 amp available from the auxiliary power
supply terminals (24 VDC, 0.5 amps 12 VDC in battery
saver mode) and the remaining 3 amps, available as two
additional notification appliance circuits, when a 2500
BELL Card is added to the system.
The unique modular design makes it easy to add features
when they are needed. These include a remote interface
keypad, remote annunciator, digital communicator, LEM/
LRM, extra control relays, additional notification appliance circuits and additional initiating device circuits. Up
to 24 Class B, Style B initiating device circuits can be
added to the 2501 basic unit if needed. Furthermore, the
ESL 2501 Fire Alarm Control Panel is equipped with a
Remote Keypad Port. This allows the use of an optional
ESL 2500 Keypad for enhanced user interface.

• Expandable Modular Design: up to 25 Class B Zones
• Patented Direct On-line Power Supply provides
regulated, filtered 24VDC at 7 amps output.
• Single zone panel can be used as 3 amp (NAC) power
booster with 1 amp auxiliary power available for 24 V
panels or 0.5 amp for 12 V panels.
• An additional bell card 2500-BELL can be used to
provide two additional notification appliance circuits
(1.5 amps each for 6.0 amps total and 1 amp auxiliary
power).
• Panel network capability: Each zone input can connect
to an independent panel.
• Approved for Sprinkler Supervisory and Waterflow
Alarm.
• Functions are easily programmable through pushbutton switches on BMB or optional keypad.
• Battery saver mode allows smaller, less expensive
batteries to meet 24 or 60 hour standby requirements.
• Optional Plug-in Two-line Dialer for Supervising Station
reporting.
• Automatically senses and reports when ESL 521 series
smoke detectors need cleaning over standard 2-wire
zones.
• Built-in walk test and alarm verification by zone.
• All output circuits power-limited, except battery and
relay output connections.
• Programmable notification appliance circuit output
with a variety of cadences; Temporal 3, March Time,
California March Time, Steady, Non-Silenceable Steady
and Latching Non-Silenceable Steady.

One enclosure is used for most system configurations. One
cabinet can hold up to 3 expander modules, as well as the
necessary standby batteries for either 24 or 60 hour
operation. The three (3) expander modules provide up to
twelve (12) Class B zones plus one (1) from the BMB for a
total panel configuration of thirteen (13) Class B zones. To
accommodate system configurations beyond 13 zones, a
second enclosure can be installed. For larger installations,
the panels can be networked using non-latching zones or
the power booster option to provide maximum system
flexibility.
The versatility of the ESL 2501 Fire Alarm Control Panel
is further enhanced by its compatibility with the complete
line of ESL smoke detectors, manual fire alarm stations
and notification appliances. This allows the assembly of a
complete fire alarm system from components produced
by a single manufacturer with designed-in compatibility
and reliability. See Appendix A for the list of UL Listed
compatible devices.

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1.2 PANEL EQUIPMENT

1.3 PANEL LISTINGS

The flexibility of the ESL 2501 Fire Alarm Control Panel
is derived from its modular design and the array of
function modules available for integration into the 2501
basic unit. These modules are listed below.

The ESL 2501 Fire Alarm Control Panel is equipped with
a “Battery Saving Switching Mechanism” U.S. Patent No.:
5,804,891. The 2501 (FACP) functions in accordance with
the National Fire Alarm Code (NFPA 72) and the California State Fire Marshal (7165-1459:111) for the following:

Model
Number
2501
2502-ZEM

Description

Type of Signaling
System

Single Zone Panel, 7 Amp Power Supply

Local (L)

2500-BELL

2 Additional Bell Circuits, 3 Amp Expander

2500-KPD

LCD Keypad

2500-ZRM2

2-Zone, Relay Module

2500-ZRM4

4-Zone, Relay Module
Printer Interface Module

System Housing with Nameplates

2500-PS

7 Amp Power Supply, for replacement

2500-RA
2500-RADVR
2500-LEM/LRM

Proprietary (P)
A, M, WF, SS
Protected Premises Unit

NC, California March
Time, ANSI Temporal 3

Household

A, M, WF, and SS NC, California March
Time, ANSI Temporal 3,
and Digital Alarm
Communicator (DAC)

Auxiliary

A, M, WF

Single Zone Panel, replacement circuit board

2500-SH

2500-DAC

A, M, WF, and SS NC, California March
Time, ANSI Temporal 3

Central/Remote Station A, M, WF, and SS Digital Alarm
(CS/RS) Protected
Communicator (DAC)
Premises unit

4-Zone, Class B, Expander

2500-BMB

Type of Signal

2-Zone, Class B, Expander

2504-ZEM

ZXPTR

Type of Alarm
Service

Full Featured Dual Line Dialer

A = Automatic Detection (smoke detectors, heat
detectors, etc.)
DAC = Digital Alarm Communicator
M = Manual Fire Alarm Box (Pull Stations)
NC = Non-Coded
SS = Sprinkler Supervisory
WF = Water Flow Alarm

Remote Annunciator
Remote Annunciator with Outputs
Configurable Local Energy or
Line Reversal Module

Figure 1.3 Signaling System Table

NOTE: For standby current calculations, see Appendix B
Battery Calculation Worksheet.

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2.0

1.4 CUSTOMIZED PANELS
Your 2501 (FACP) may be custom built according to the
number of zones desired. The following chart shows what
equipment is needed for the desired number of zones.

Class B Panel
Zones
No.
Desired *2501
1

Over 13
2 Zone
4 Zone
zones, add
Expansion Expansion add’t panel
Boards
Boards
housing
(2502-ZEM) (2504-ZEM) p/n 2500-SH
1

1
2

2
3

Figure 1.4 Custom Panel Building Table

Additional enhancements may be added to the panel of
your choice from the following:
Adds two more notification appliance
circuits and allows use of the full 7
amps of 24 VDC power available with
the 2501 (FACP).
• 2500-ZRM2
Adds SPDT relays (2) to 2502-ZEM
• 2500-ZRM4
Adds SPDT relays (4) to 2504-ZEM
• 2500-KPD
Adds an LCD keypad to your 2501 (FACP)
• ZXPTR
Adds a printer interface module
• 2500-RA
Adds remote visible and audible
annunciation, system status and zone
status (4 RA’s per system are allowed)
• 2500-RADVR Same as 2500-RA, except in addition,
there is one active low output per zone
intended to indicate alarm condition.
These lines are not supervised.
• 2500-LEM/LRM Local Energy Module for connection to
a listed master box. Can also be
configured as a Line Reversal Module
for connection to appropriate devices.
• 2500-DAC
Dual Line Dialer with complete reporting capability for all 25 zones.

2.1 2501 (FACP)
The basic version of the 2501 Fire Alarm Control Panel
can be expanded to accommodate up to 25 Class B, Style
B initiating device circuits. Figure 1.4 presents in tabular
form the number of Expansion Boards of each type
needed to attain a given number of initiating device
circuits.

1
1

* 2501 can also be used as a 3.0 amp (NAC) power
booster (6.0 amps with 2500-BELL)

• 2500-BELL

SYSTEM CONFIGURATIONS

The 2501 (FACP) can be enhanced by adding two
additional notification appliance circuits (NAC) with the
2500-BELL expansion card. This card adds two additional bell circuits and allows use of the full 7 amps of 24
VDC power available from the 2501 (FACP) power supply
(6 amps are used for the notification appliance circuits
(NAC), up to 1 amp is used for auxiliary power).
Further enhancement of the 2501 (FACP) is provided by
the (2500-ZRM2) or (2500-ZRM4) zone follower relay
cards. These add-on cards provide SPDT relays rated 30
VDC at 2 amps resistive in a zone follower configuration.
These relay contacts are “dry” and, hence, unsupervised.
They should only be used in conjunction with a supervised circuit or to control non-critical or “fail-safe”
functions.
A printed copy of the events that occur in the 2501
(FACP) can be obtained by the addition of the ZXPTR
printer interface module. The BMB and DAC function
maps can be printed when this module is installed. This
module allows a standard printer with a Centronics
interface to be connected to the 2501 (FACP). Events will
be printed as they occur or the entire event history can
be printed at the user’s discretion.
The 2500-KPD LCD keypad may be added to the 2501
(FACP) to program all the system functions and allow for
on premises remote panel manipulation. Up to 3 supervised keypads and 1 unsupervised keypad may be added.
The 2500-KPD LCD keypad gives you access to additional
functionality of the 2501 (FACP). The keypad also allows
access to the event history and programming and testing
of other system peripherals. Access to all critical items
are restricted by the use of passcodes to prevent access
by non-authorized users.
For localities requiring remote annunciators, the 2500-RA
and 2500-RADVR can be added. Up to four devices can
be added. Each device is configurable for zones 1-13 or
zones 14-25 and all devices are supervised. The device
indicates the system status and the zone status on a zone
by zone basis. In addition to these capabilities, the
RADVR has low current (sinks up to 40mA) active low
zone follower outputs. These outputs are intended to

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interface with MPI-206 Accessory Relay Boards or
similarly isolated devices for driving graphic displays as
desired or where mandated by local authorities.
For localities that utilize Listed Master Boxes in a
municipal system, the 2500-LEM/LRM can be installed.
This device provides the required connectivity to the
Listed Master Box. The connection is supervised and will
automatically restore when the master box is reset. In
addition, the module can be configured as a Line Reversal
Module for applications that require this functionality.
The connections are also supervised and auto-restore
when the device or connections are returned to a normal
state.
Another enhancement to the 2501 FACP is the 2500DAC, Digital Alarm Communicator. This is a full featured
DAC that reports all system events in the following
selectable formats: Pulse - 20 baud extended, Pulse - 20
baud non-extended, Pulse - 40 baud extended, SIA,
Contact ID, and Pager. The DAC is programmable with a
2500-KPD. Front panel programming is not supported. In
addition to these report formats, the DAC accepts two
supervised phone lines. For remote programming
capabilities, contact Sentrol Technical Services at 1-800800-2027.

2.2 POWER BOOST
With the adoption of the Americans with Disabilities Act
(ADA) it has become necessary to provide equivalent fire
alarm notification for those with hearing impairments.
This requirement is usually addressed with visible
notification appliances (strobe lights). Frequently,
existing systems cannot provide sufficient current to
operate all of the visible notification appliances necessary
to comply with the ADA and a “power booster” is needed
to provide additional notification appliance power. The
base model 2501 can be connected to be an add-on power
booster for any UL Listed fire alarm control panel including
the 2501 (FACP). Power Booster terminals are a feature of
the panel. The panel will act as a 3 amp (NAC) power
booster with two notification appliance circuits. With the
addition of the 2500-BELL to the base model, two more
notification appliance circuits are added providing a 6 amp
(NAC) power booster with four notification appliance
circuits. See Figure 2.2 for Power Booster wiring.
In the power booster configuration, an alarm on the master
fire alarm control panel will activate an alarm on the power
booster fire alarm control panel. Interconnect wiring is
supervised and will generate a system trouble on the master
panel if the interconnect wiring is compromised. Any
system trouble on the power boost panel will generate a bell
and system trouble on the master panel. The interconnect
loop will generate a bell and system trouble at the Master
panel if the wiring should become compromised.

2.3 SYSTEM NETWORKING
If the facility to be protected requires more than 25
initiating device circuits in order to fulfill the owner/
operator’s fire protection objectives, ESL 2501 control
panels can be connected together in what is commonly
referred to as a “master-slave” configuration. One unit is
designated the “master” and the other acts as the “slave”.
One initiating device circuit on the “master” unit is
programmed as a non-latching initiating device circuit
(See Section 5) and the wiring for this circuit is connected to the general alarm-operated and troubleoperated contacts of the “slave” unit BMB. This wiring
connection is illustrated in Figures 2.3a and 2.3b. Any
initiating device circuit of the “master” unit can be used
to receive signals from the “slave” unit in this manner.
When a detector initiates an alarm on an initiating device
circuit of the “slave” unit, its alarm-operated contacts
transfer and, hence, appear as a shorting contact initiating device alarm initiation at the “master” unit. The
interconnection between the master and slave units is
supervised and the End Of Line (EOL) resistor (provided)
MUST BE INSTALLED, as shown. Refer to Figure 2.3a for
installation wiring as a Master-Slave panel and Figure 2.3b
for installation wiring with a ZEM.
The Master-Slave configuration may also be implemented
with a power boost capability. This configuration is used in
applications where a local networked system is desired.
Refer to Figure 2.3c for the installation wiring. After the
installation wiring is accomplished, the panel must be
programmed as indicated on the wiring installation diagram
(see Section 5). The Master-Slave configuration will now
operate in the following manner. All zone inputs on the
Master are dedicated for Slave panel operation. Program all
bell outputs as required to meet your system design
requirements. In the Zone Bell Definition Table for each
Slave panel, program all Bells associated to Zone 1 only. In
this configuration, an alarm condition on a Slave unit will
communicate through its Alarm and Trouble dry contacts
that the Slave is in alarm. The Master will signal through
the Bell outputs that the system is in alarm and all system
bell outputs (Slaves and Master) will activate. The only
method to silence the system bells is to activate the Alarm
Silence on the Master unit. This will result in the bells
silencing on all panels. The Master will indicate on board its
control board that the bells are silenced by illuminating the
bell silenced LED. A Slave panel cannot be locally silenced.
The previous description covers all of the necessary wiring
for a Master panel to supervise and report the conditions of
up to 25 other Slave panels, allowing for very large system
coverage and expansion when needed.

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detect any alarms or other troubles and the notification
appliances will not sound.

2.4 DOOR HOLDERS
The 2501 (FACP) is suitable for door holder applications.
See Figure 2.4 for Door Holder Installation.
Battery saver mode is not allowed when using door
holders. They are rated for 24 VDC operation only with
the 2501 (FACP). The 2501 should be programmed (see
Section 5) so that the common trouble contacts transfer
on loss of AC only. This will release the door holders on
loss of AC. The door holders will also release on alarm.

2.5 LOW BATTERY ANNUNCIATION
The 2501 (FACP) will automatically perform a battery
check 15 seconds after power up. If the voltage of either
battery is below 11.0 VDC, the 2501 (FACP) will illuminate the System Trouble and the No/Low Battery Trouble
LEDs and sound the trouble sounder. When the voltage of
either battery drops below 10.5 VDC, the 2501 (FACP)
will log the condition to the event log. The 2501 (FACP)
will not record a restoral unless both battery voltages
return to a value above 11.0 VDC. After the initial power
up battery test, the 2501 (FACP) will perform the same
battery test every hour. If the batteries are disconnected
after the power up battery test, the 2501 (FACP) will
illuminate the System Trouble and No/Low Battery
Trouble LEDs and sound the trouble sounder within 10
seconds.
The 2501 (FACP) will not perform a scheduled battery
test while the notification appliances (NAC) are active. It
will perform the battery test after the notification
appliances become inactive.

The 2501 (FACP) will indicate hibernation mode by
flashing the yellow LOW/NO AC and LOW/NO BATT LEDs
at one (1) second intervals, the SYSTEM TROUBLE LED
will be illuminated, and the local sounder will emit the
trouble sound.
The panel will automatically exit out of hibernation mode
and return to normal operation when the Low/No AC
condition is restored. After normal operating power has
been restored, the panel will continue to indicate that it
had been in hibernation by illuminating the SYSTEM
TROUBLE LED and sounding the trouble sounder until a
SYSTEM RESET is performed.

2.7 DRILL TEST
A drill test may be performed by providing a dry contact
closure between the Drill Test terminal and the Negative
terminal. The ESL 2501 will sound the NACs with the
programmed cadences. The communicator will not be
activated and the common alarm and trouble contacts are
not activated. An event is not generated in the event log.

2.8 TROUBLE RESOUND TIME
The trouble sounder has a default resound interval of 15
minutes. It may be programmed to three additional
values: 1, 4, or 24 hours. See Section 5.0 Programming.

To force a battery test, press the SYSTEM RESET pushbutton. The 2501 (FACP) will automatically perform a
battery test 10 seconds later.

2.9 COMM TEST

2.6 HIBERNATION MODE

When the system uses a 2500-DAC Digital Alarm Communicator, an automatic comm test is performed every 24
hours as a minimum. The system can be programmed for
a longer comm test interval if desired. The system
automatically toggles between phones so that each phone
line is tested at least once every 48 hours.

No electronic or electrical system can be expected to
operate properly if there is insufficient electrical power.
For this reason the National Fire Alarm Code (NFPA 72)
requires that fire alarm control panels have both a
primary and secondary source of electrical power, usually
a dedicated 110 VAC branch circuit and battery back-up.
If the 110 VAC electrical power is lost AND the system
has been operating on battery secondary power for an
extended period of time, beyond that contemplated by the
code, eventually the battery set will become depleted.
Under these conditions the fire alarm control panel can
no longer be expected to operate reliably. This will occur
when the battery voltage is at 19.0 VDC. The panel will
automatically log the event and then go into hibernation
mode. While in hibernation, the 2501 (FACP) will not

2.10 DUAL LRM OPERATION
For localities requiring dual Line Reversal Module
applications, the 2501 FACP can be programmed to
transmit separate supervisory and alarm signals. This is
accomplished with the 2500-BELL expansion module.
The FACP is programmed to operate the Bell expansion
module as a dual LRM. Bell 3 will activate for a fire alarm
and Bell 4 will activate for a supervisory alarm. For a Fire
Alarm, the Bell 3 output circuit will reverse transmitting

Sentrol 1-800-547-2556

the alarm signal to the connected device. All other
System Alarm functions are as required. For a Supervisory Alarm, the Bell 4 output circuit will reverse transmitting a Supervisory Alarm to the connected device. All
other Supervisory Alarm functions are as required. See
Section 5 for programming information. See Figure 2.10
Dual LRM Installation Diagram for installation information. The connections are supervised and will result in a
System and Bell 3 and/or Bell 4 Trouble if the lines are
compromised. For system trouble transmission, the
System Trouble dry contacts are available.

2.11 GROUND FAULT INDICATION
OPERATION
The FACP is equipped with ground fault detection
circuitry. If required, the ground fault detection circuitry
may be disabled by programming the BMB. Refer to
Section 5.0 Programming for assistance with programming this feature. The FACP will function normally in the
presence of a ground fault. Some localities are required
by local jurisdiction to annunciate this condition.

Sentrol 1-800-547-2556

Caution: Break the wire at each terminal to ensure that the connections are
supervised - Do not loop the wire under the terminals.

Supervised Signaling Line

NEG

DRILL
TEST

2.7K
EOL

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

JP2

COMMON AL
NC COM

MASTER BMB

2.7K
EOL

NEG

DRILL
TEST

2.7K
EOL

Power Booster
NAC Circuits

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

IN FOR
ZONE 1
CLASS B

LRM/LEM

JP3

+ + - -

Supervised Signaling Line

+ + - -

Notification
Appliances

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

JP2

Zone 1 programmed
as power booster

A-

A+
BBELL 4

B+

A-

Optional
BELL EXPANDER

POWER BOOST BMB

NOTE: Use EOL resistors (provided) for all initiating and NAC circuits.

Figure 2.2 Power Boost Installation Diagram

A+
BBELL 3

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B+

IN FOR
ZONE 1
CLASS B

LRM/LEM

JP3

GREEN WHITE
+12V DAT A DAT B NEG

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

NOTE: The power booster is
compatible with all UL Listed
reversing NAC circuits. The
normal standby current draw
is 1 mA. The alarm current
draw is 23 mA. Use the correct EOL for the listed panel
selected to achieve the
power booster functionality.

Caution: Break the wire at each terminal to ensure that the connections are
supervised - Do not loop the wire under the terminals.

+ + - -

To UL Listed
Proprietary
Receiving Unit

2.7K
EOL

Notification Appliances
DRILL
NEG TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1
JP2

Supervised Signaling Line

IN FOR
ZONE 1
CLASS B

Zone 1 Programmed

MASTER
NOTE: Connect
to anyBMB
UL Listed as Non-Latching
Proprietary Receiving Unit
2.7K
EOL

NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

JP2
IN FOR
ZONE 1
CLASS B

LRM/LEM

JP3

SLAVE BMB

GREEN WHITE
+12V DAT A DAT B NEG

2.7K
EOL

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

Supervised Signaling Line

COMMON AL
NC COM

JP3

NOTE: Use EOL resistors (provided) for all initiating and NAC circuits.

Figure 2.3a Slave Panel Installation Diagram

Sentrol 1-800-547-2556

Caution: Break the wire at each terminal to ensure that the connections are
supervised - Do not loop the wire under the terminals.

+ + - -

2.7K
EOL

Notification Appliances
NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

JP2

COMMON AL
NC COM

IN FOR
ZONE 1
CLASS B

LRM/LEM

JP3

MASTER BMB

NORM

Connectors from
Power Supply

Databus
Connector

DIS
SWT

4 Pin to 4 Pin
Cable Assembly

GND
BELL
BELL4 BELL3
CPU
FAULT SILENCE TROUBLE TROUBLE FAULT

Databus
Connector

LOW
LOW
BELL1
BELL2
DET
NO AC NO BATT TROUBLE TROUBLE MAINT

NEG

ZEM

DRILL
TEST

- PWR + SWITCH AUX N
BOOSTER AUX12/24 12/24

SLAVE BMB

TB1

2.7K
EOL

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

Databus
Connector

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

Supervised Signaling Line

This configuration is not available
at this time.

Supervised Signaling Line
NOTE: Use EOL resistors (provided) for all initiating and NAC circuits.

Figure 2.3b Slave Panel Installation with a ZEM Diagram

Sentrol 1-800-547-2556

Caution: Break the wire at each terminal to ensure that the connections are
supervised - Do not loop the wire under the terminals.

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

JP2

JP3

Zone 1 Programmed
as Non-Latching

MASTER BMB

IN FOR
ZONE 1
CLASS B

LRM/LEM

Supervised Signaling Line

NEG

COMMON AL
NC COM

Supervised Signaling Line

+ + - -

+ + - Notification Appliances

Program All Bells
Steady
Program All Zones as
Non-Latching
2.7K
EOL

2.7K
EOL

NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

JP2

SLAVE/POWER BOOST
BMB

LRM/LEM

Zone 1 Programmed
as Power Booster
Program Bells as Desired
Program All Bells
Associated to Zone 1
Only in the Bell
Association Table

IN FOR
ZONE 1
CLASS B

GREEN WHITE
+12V DAT A DAT B NEG

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

2.7K
EOL

JP3

NOTE: Use EOL resistors (provided) for all initiating and NAC circuits.

Figure 2.3c Slave Panel with Power Boost Installation Diagram

Sentrol 1-800-547-2556

Caution: Break the wire at each terminal to ensure that the connections are
supervised - Do not loop the wire under the terminals.

DOOR
HOLDER

COM

NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

JP2

LRM/LEM

BMB

GREEN WHITE
+12V DAT A DAT B NEG

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

JP3

IN FOR
ZONE 1
CLASS B

NOTE: Program common trouble contacts for open on loss of AC. See Section 5.0 Programming.
Battery saver mode not applicable for door holder use.
Figure 2.4 Door Holder Installation Diagram

Sentrol 1-800-547-2556

Supervisory
Field Connections

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

A-

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

A-

A+
BBELL 3

B+

A+
BBELL 4

BELL EXPANDER

GREEN WHITE
+12V DAT A DAT B NEG

NEG

LRM/LEM

Alarm
Field Connections

BMB

NORM

Databus
Connector

Connectors from
Power Supply

DIS
SWT

CPU
BELL
GND
BELL4 BELL3
FAULT SILENCE TROUBLE TROUBLE FAULT

LOW
LOW
BELL1
BELL2
DET
NO AC NO BATT TROUBLE TROUBLE MAINT

This application is used for separate Fire Alarm and
Supervisory Alarm reporting. See Section 5.0 Programming.
Program Communicator Type for Dual LRM.

NOTE: Use EOL resistors (provided) for all initiating
and NAC circuits.

Figure 2.10 Dual LRM Installation Diagram

Sentrol 1-800-547-2556

3.0
GENERAL SYSTEM
INSTALLATION GUIDELINES
First and foremost, CAREFULLY READ AND MAKE
SURE YOU UNDERSTAND THE ENTIRE MANUAL
BEFORE BEGINNING THE INSTALLATION. The
reliable performance of the fire alarm system is dependent upon proper system design, installation and maintenance.
Before installing the panel, a fire alarm system must be
designed. The design of fire alarm systems is often
regulated by the state or municipality through legislation
requiring fire alarm system designers be certified or
licensed. Make certain that the design and designer of the
system comply with the relevant local laws, regulations
and building codes and sub-codes.
The design of a fire alarm system requires a thorough
evaluation of the fire hazards and risks inherent in the
facility to be protected. The design of the fire alarm
system must also reflect the explicit fire safety objectives
of the owner/operator of the site. The design of the fire
alarm system must comply with the minimum compliance requirements in the relevant local codes and
regulations. These local codes and regulations usually, by
reference, adopt the National Fire Alarm Code. Consequently, the fire alarm system design must also comply
with the applicable edition of the National Fire Alarm
Code, NFPA 72; available from the National Fire Protection Association, 1 Batterymarch Park, Quincy, MA
02269-9101, tel: 1-800-344-3555. Also, if questions arise
call Sentrol Technical Services at 1-800-800-2027.
The design of the system includes:
•
The type, quantity and location of alarm initiating
within the facility being protected.
•
The type, quantity and location of alarm notification
appliances, both audible and visible, within the
facility being protected.
•
The connections between the fire alarm system and
other building systems such as the HVAC system,
door closers, elevator controls and security systems.
•
The programmed system response to alarm signals
for each initiating device or notification appliance
circuit.
•
The type, size and installation method of the wiring
conductors interconnecting system components.
•
The type, size and installation method of the wiring
conductors connecting the fire alarm system control
unit to the primary power supply.
•
The capacity of the fire alarm system secondary
power supply (battery set).
•
A dedicated, locked and labeled branch circuit (unswitched) for primary power supply.
All design criteria should be documented in the system
design. Sentrol has provided a number of design aids in

this manual. Figure 3.0, 2501 (FACP) Interconnect
Diagram, identifies the intended use for each wiring
terminal. Section 5 provides instructions for programming the FACP. Section 10 provides a review of the
design of household fire warning systems. Appendix B
provides a battery secondary power supply calculation
worksheet. Additional design guidance is available from
the local building code, local fire code and the National
Fire Alarm Code, NFPA 72.

3.1 GENERAL INSTALLATION PROCEDURE
The ESL 2501 Fire Alarm Control Panel has been
designed to be easy to install. Below we have outlined an
installation procedure that will lead to timely completion
of the installation and result in trouble-free operation.
Step 1. Planning: Referring to Figure 3.0, ESL 2501 Fire
Alarm Control Panel Interconnection Diagram, for
specific guidance, prepare a carefully laid-out and
complete wiring diagram of the entire system as designed.
This drawing should show the point-to-point connections
being made to all fire alarm system devices, including, but
not limited to: smoke detectors, manual fire alarm boxes,
fire alarm notification appliances (both visible and
audible), sprinkler system supervisory devices, sprinkler
system waterflow initiating devices and the connection to
the off-premises fire alarm signal receiving station, if
included in the system design. This wiring diagram
should show the calculations used for computing the
capacity of the battery secondary power supply according
to the Battery Calculation Worksheet, provided in
Appendix B. All drawings and calculations should be
maintained as part of the permanent record of the fire
alarm system installation. All power-limited connections
must be made with component recognized energy limited
cable.
Step 2. Equipment Inspection: Carefully unpack the
system components and inspect for damage incurred in
shipping. Immediately report any damage to the place of
purchase for disposition.
Step 3. Mount Cabinet: Mount the cabinet in a clean,
dry, vibration free area, where the temperature range
does not exceed 0 to 49oC (32 to 120oF). Mount only in
interior locations. Allow adequate space for 180 degree
door swing and free access to all sides for conduit entry.
Locate the top of the cabinet approximately six (6) feet
above the floor, with the hinge mounting on the left.
Mounting holes in the back of the cabinet are designed so
the cabinet can be mounted without removing any
control equipment. Mount the cabinet to the wall by first
installing the top center mounting screw leaving enough
space so the cabinet can be hooked over the screw head.
Use screws or bolts no smaller than #10 or 3/16 inches in
diameter. For easier access, remove the door by gently
lifting it from the hinges.

Sentrol 1-800-547-2556

Step 4. Install Fire Alarm System Devices: Refer to the
installation instructions provided with the compatible fire
alarm system devices (smoke detectors, heat detectors,
manual fire alarm boxes, audible notification appliances,
visible notification appliances and other similar devices)
and install these devices as permitted by their installation
instructions. Note that the UL Listing of some devices
permits their installation without a junction box if also
permissible under the local building code. Also note that
the installation of fire alarm systems is covered in Article
760 of the National Electrical Code (NEC), NFPA 70.
Article 760 of the NEC stipulates the types of wire
permissible for fire alarm installations employing conduit
as well as those using Listed Fire Alarm Cable. The
initiating device circuits and notification appliance
circuits are power-limited circuits. Use an installation
method permitted by Article 760 of the NEC to connect
fire alarm devices to the fire alarm system control panel.
Keep in mind that where ever conduit or cable enters a
junction box or electrical enclosure it must be provided
with a Listed bushing or connector, as appropriate. Refer
to Section 4.1, Detail Installation Guide, for further
information. DO NOT connect field wiring until after the
fire alarm control unit has been properly checked.
Step 5. Physical Assembly Check: Verify that all boards
are properly snapped into place over the locking clip. To
add a board to the panel, firmly press the board onto the
standoffs until the board snaps over the locking clip. To
remove a board from the standoffs, press the locking clip
in with needle-nose pliers or a flat head screwdriver (see
Figure 3.1a).

PRESS

Examine the installation of all modules, chassis, and
subassemblies to insure proper mechanical and electrical
connections and programming switches have been
selected.
Step 6. Basic 2501 System Check: Prior to connecting
field wiring to the unit, it is necessary to make certain
that the 2501 is operating properly. This is achieved by
performing the System Check.
Install the 2.7k Ω 5% End of Line (EOL) resistor (provided)
to Zone 1, BELL 1 and BELL 2. Make sure all switches are

in their normal positions. Connect the power supply cable
assemblies between the BMB and power supply. Connect
the AC flying leads to an unswitched 120 VAC 50/60 Hz
power supply. See Figure 3.0, 2501 (FACP) Interconnect
Diagram. Connect the red wire to the positive (+) spade lug
of Battery 1 and the black wire to the negative (-) spade lug
of Battery 1. Connect the red with white stripe wire to the
positive (+) spade lug of Battery 2 and the black with white
stripe wire to the negative spade lug of Battery 2. No fault
indicator should be present. If faults are present, see the
Troubleshooting Guide Section 9.0. System check is now
complete.
NOTE: If new batteries with low terminal voltage are
used, the Low/No battery LED may activate and the
Trouble Sounder will sound. Silence the Trouble Sounder
and charge the batteries. The Low Battery indicator will
deactivate after the batteries are fully charged; no longer
than 48 hours.
Step 7. Check Field Wiring: Check the integrity of all
field wiring following directions defined in the Field Wiring
Checkout Procedures found in Section 4.2. This check
must be performed before connecting wiring to the system.
Be certain all external wiring is correct (no opens, shorts,
or grounds) and is terminated with the end-of-line devices
provided.
Step 8. Connection of Field Wiring: Remove power
from the system and connect the first circuit to the
control unit. Restore power and verify that the circuit is
working properly. If not, refer to Section 9, Troubleshooting Guide, for specific steps for isolating and
identifying the source of the problem. Repeat, connecting
the field wiring one circuit at a time, as shown on the
system wiring diagram created in Step 1. DO NOT MAKE
ALL CONNECTIONS AT ONCE! Connecting one circuit
at a time allows for the quick identification of wiring
errors and prevents the possibility of a wiring error
causing damage to the system electronics. During the
connection process document any changes made in the
system wiring on the system wiring diagram.
Step 9. Test System: An installation of a fire alarm
system is NOT complete until the acceptance testing and
system documentation is completed. Acceptance testing
involves the actuation of all of the initiating devices and
the verification that each device causes the appropriate
response. The acceptance testing also includes the
verification that each and every notification appliance is
operational and operates when intended. Each function
the system is intended to perform must be verified.
The documentation must include a completed Record of
Completion form (Figure 1-7.2.1 in NFPA 72-1996) and a
set of As-Built drawings that show exactly how the system
is actually wired and the serial numbers of all devices
used.
Refer to Section 6 and 7 of this manual for additional,
more detailed information.

Sentrol 1-800-547-2556

3.2 BMB OPERATION VERIFICATION
BMB DAUGHTER BOARD DESCRIPTION
The Daughter Board LEDs (D1 - D6) are used to indicate
the status of the system and to program the BMB function
map (see Chapter 5.0 Programming). See Figure 3.2a for
push-button and LED locations. See Figure 3.2b for a
description of the LEDs on the BMB Daughter Board.

SYS
SUP D3
PROG

SW7

LED

SW3

SW2

SYS
TRBL
DOWN

SW8

ZONE 1
ALARM

RESET

VALUE
VALUE

UP
SW4

SW1

SYS
ALM

AC PWR

ALARM

TROUBLE

LOCATION
LOCATION
UP
SW5

ZONE 1
TRBL

The large push-buttons are primarily used to handle
alarm and trouble conditions in the system. The SYSTEM
RESET push-button is used to reset any zones that are in
an alarm condition. If the SYSTEM RESET push-button is
pressed and no alarm condition has occurred, the BMB
will perform a battery test within 15 seconds. This allows
the installer to test the batteries without waiting for the
standard battery test which is performed every hour. The
ALARM SILENCE push-button is used to silence any
audibles that have not been programmed as nonsilenceable. If an alarm condition occurs after the
audibles have been silenced, the audibles will sound
again. The TROUBLE SILENCE push-button will silence
all activated trouble conditions when pressed. If a trouble
condition occurs after the trouble has been silenced, the
local sounder will sound again. These three push-buttons
are also used in programming mode (see Section 5.2,
System Programming).

DOWN

Located on the bottom of the Daughter Board is one small
push-button labeled PROG. This push-button is used
only for BMB function map programming (see Section 5.2,
System Programming).

SW6

Description

AC PWR (D6)

Detects ample AC power. The LED will be lit.

SYS ALM (D1)

Used to indicate an alarm condition for any
one of the 25 zones.

SYS TRBL (D2)

Used to indicate a trouble has occurred in the
system. This trouble may be a zone trouble,
BMB diagnostic trouble, or a communication
problem with a peripheral.

SYS SUP (D3)

Used to indicate that one or more of the zones
in alarm is a supervisory zone.

ZONE 1 TRBL (D4)

Used to indicate a trouble condition on the
BMBs integral Zone 1.

ZONE 1 ALARM (D5)

Used to indicate an alarm condition on the
BMBs integral Zone 1.

BMB MAIN BOARD LED DESCRIPTION
The BMB main board has 10 yellow LEDs that are used to
indicate system troubles that are not zone related (see
Figure 5.6, LED Location Diagram for Programming
Location and Programmed Value). These LEDs are also
used for function map programming (see Chapter 5.0,
Programming).
NOTE: Not all system troubles are indicated on the 10
yellow LEDs located on the BMB main board. See
Figure 3.2d for a list of system troubles that are indicated through the use of an ESL 2500 keypad.

Figure 3.2b BMB Daughter Board LED Table

Sentrol 1-800-547-2556

System Trouble

Description

3.3 ZEM ADDRESS SELECTION

CPU Fault

Indicates that the BMB microprocessor is defective and the system is completely inactive.

BELL SILENCE

Indicates that a bell (NAC) has been silenced.

BELL 1, BELL 2, BELL 3,
BELL 4 TROUBLE

Indicates that there is a short or open in the
wiring or that the EOL is missing.

GND FAULT

Indicates an earth ground connection to the
system. (see Section 6.3, Ground Fault Test).

LOW NO AC

Indicates the loss of AC power or that the AC
voltage is not high enough to power the
system.

LOW NO BATT

Indicates that the battery voltage is low or
the batteries are missing. If the battery voltage drops far enough and there is no AC
power, the system will go into hibernation
mode. During hibernation mode, the BMB
will flash LOW NO AC, LOW NO BATT, and
AC PWR LEDs. If conditions permit, the panel
will leave hibernation mode.

DET MAINT

Indicates when one of the smoke detectors
in the system signals that it needs to be
cleaned (see Section 5.5, CleanMe Mode Programming).

Figure 3.2c Additional System Troubles

Keypad System
Trouble

Many facilities need more than one initiating device circuit
in order to implement a design that complies with all of the
code requirements. Additional initiating device circuits (up
to 25 additional circuits before it is necessary to begin
networking multiple control panels) are added by adding
Zone Expander Modules (ZEMs) to the basic 2501 FACP.
When this is done the ZEM must be programmed with an
electronic “name” in order for the BMB computer to know
which ZEM is initiating the alarm signal. The first added
ZEM should be given address “1” by putting S1 in the ON
position and S2, S3 and S4 in the OFF position. The next
ZEM should be given the address “2”, with S1 through S4
being positioned OFF-ON-OFF-OFF, respectively. Figure
3.3 shows the addressing for the ZEMs.

ZEM NUMBER

OFF

Description

NO AC POWER

Indicates the loss of AC power or that the AC voltage is not high enough to power the system.

LOW BATTERY

Indicates that the battery voltage is low or the
batteries are missing.

BELL

Indicates that there is a short or open in the
wiring or that the EOL is missing.

GROUND FAULT

Indicates an earth ground connection to the
system.

BELL SILENCE

Indicates that a bell (NAC) has been silenced.

DRILL TEST

Indicates that a drill test is being performed.

HIBERNATION

Indicates that the panel has gone into hibernation mode.

LEM/LRM

Indicates a problem with the LEM/LRM module.

TELCO

Indicates a problem with a 2500-DAC phone
line.

EXPANDER

Indicates a missing ZEM module.

DAC

Indicates a problem with the 2500-DAC
module.

KEYPAD

Indicates a missing supervised keypad.

Indicates a missing supervised RA.

COMM

Indicates a 2500-DAC communication failure.

MEMORY

Indicates a function map memory failure with
either the BMB or 2500-DAC. Enter programming mode to clear.

Figure 3.3 ZEM Address Selection Chart

When using multiple 2502 Class B zone expansion
modules, it will be necessary to leave some panel zones
unused to ensure that the modules LED’s line up with the
correct zone identifiers on the front panel display. For
example, if two 2502-ZEM’s are used, zones 2 and 3 will
be used, then 4 and 5 will be skipped, and zones 6 and 7
will be used for the second 2502-ZEM. Please call Sentrol
Technical Services at 1-800-800-2027 with any questions.
NOTE: For best zone LED alignment results, do not use
multiple two zone expansion modules (2502-ZEM) when
a four zone module (2504-ZEM) can be used.
Only the combinations listed above are allowed. Any
other combinations will not be recognized by the 2501
(FACP). If two (2) or more modules are set to the same
address, the 2501 (FACP) will not recognize the incorrectly addressed modules.

Figure 3.2d System Troubles Indicated by the ESL 2500
Keypad

Sentrol 1-800-547-2556

Every zone on the 2501 (FACP) has a zone function
jumper that allows for easy testing. This jumper allows
for four (4) settings:
Normal
Walk Test
Silent Walk Test
Disconnect

NORM
WT
SWT
DIS

During installation, set the zone function jumpers to the
Normal (NORM) position, see Figure 3.4, Function
Jumper diagram. (See Section 6.4 for instructions on
testing the 2501 (FACP) with the zone function jumpers).

The ZXPTR Parallel Printer Interface Module allows the
connection of a Centronics compatible printer to the ESL
2501 FACP (see Figure 3.5e). This provides the ability to
print “real time” events, reprint past event history and
print function maps. Refer to the ZXPTR Installation
Instructions for information on operation and connection.
The following table provides guidelines for the installation
of peripheral devices. These guidelines or the number of
devices and the total length of databus cable must not be
deviated from for proper operation. This table is valid for 18
AWG cable. Do not exceed 1000 Ft. in any one run of cable.
Do not exceed 2000 Ft. of total cable length. An external
supply may be required at lengths over 500 Ft. if more than
one device is at the end of the cable run.
Total Data
Cable Length

Max. Number
of Peripherals at End

Up to 500 Ft

(7) Seven

1000 Ft

(7) Seven*

2000 Ft

(7) Seven*

3.5 ADD-ON MODULES FOR EXPANDED CAPABILITIES

The 2500 Keypad is installed where the owner/operator
needs system interface and access. Interconnection
between the FACP and the Keypad is by means of a four
(4) conductor cable. The connection between the ESL
2501 Fire Alarm Control Panel and the ESL 2500 Keypad is
illustrated in Figure 3.5b.
The 2500-RA and 2500-RADVR are installed where
required by local jurisdiction or when the owner/operator
needs remote system status and zone status. Interconnection between the FACP and the remote annunciators
is by means of a four (4) conductor cable. The connection between the ESL2501 Fire Alarm Control Panel and
the remote annunciators is illustrated in Figure 3.5c.
The 2500-LEM/LRM is installed where a municipal system
is in place. Interconnection between the FACP and the
LEM/LRM module is by means of a five (5) conductor
cable. The connection between the ESL2501 Fire Alarm
Control Panel and the LEM/LRM is illustrated in Figure
3.5d.

* Power Supply required at end of cable run.
Figure 3.5a Peripheral Device Guidelines Table

B+
BZONE 1
JP2
JP2

IN FOR
FOR
IN
ZONE 11
ZONE
CLASS B
B
CLASS

GREEN WHITE
+12V DAT A DAT B NEG

LRM/LEM

JP3
JP3

BMB

Keypad
Databus
Cable

Databus
Connector

OW BELL1
BELL2
DET
ATT TROUBLE TROUBLE MAINT

Figure 3.5b Connecting BMB to Keypad

B+
BZONE 1
JP2

JP3

IN FOR
ZONE 1
CLASS B

LRM/LEM

Functional modules are added to the basic 2501 FACP by
snapping them onto the module mounting rails of the
system enclosure. The modules obtain power and
communicate via four conductor data bus cables installed
between the BMB and the first module, from the first
module to the second, etc., until all modules are connected to the data bus. The assembly of the ESL 2501
Fire Alarm Control Panel is illustrated in Figures 3.0,
3.1b, 3.1c, 3.4, 3.10 and 3.11 in this manual. A zone
description card is supplied for each zone module, as
shown in Figure 3.12, to identify each zone in terms
relevant to the specific application.

BMB

GREEN WHITE
+12V DAT A DAT B NEG

3.4 ZONE FUNCTION JUMPERS

RA/RADVR
Databus
Cable

Databus
Connector

OW BELL1
BELL2
DET
ATT TROUBLE TROUBLE MAINT

Figure 3.5c Connecting BMB to RA/RADVR

Sentrol 1-800-547-2556

The 2501 (FACP) supports three supervised keypads at
addresses 1 through 3 (Figure 3.6). More than one unsupervised keypad is allowed. All unsupervised keypads must be
at address 4 with switch 4 turned ON (Figure 3.6).

B+
BZONE 1
JP2
JP2

LRM/LEM

BMB

J2
LAMP TEST
GREEN WHITE
+12V DAT A DAT B NEG

JP3
JP3

IN
INFOR
FOR
ZONE
ZONE11
CLASS
CLASSBB

TROUBLE

LEM/LRM
NORMAL

LEM

Databus
Connector

3.7 2500-DAC
DISCONNECT

LEM

The DAC requires programming via a 2500-KPD keypad.
Refer to Section 5.0 Programming for assistance with
programming the DAC. A manual comm test switch is
provided to perform system verification and testing. The
on board status LEDs can be tested by performing a
system lamp test from the front panel or the optional
system keypad.

B+
B-

OW BELL1
BELL2
DET
ATT TROUBLE TROUBLE MAINT

JP2
IN FOR
ZONE
1 Connecting BMB to LEM/LRM
Figure
3.5d
CLASS B

( + ) 12V

DATA B

( - ) NEG

DATA A

GREEN WHITE
+12V DAT A DAT B NEG

JP3

3.8 2500-RA AND 2500-RADVR

MOOSE
a product of sentrol, inc

The RA and RADVR have dip switches for setting the
address of the specific remote annunciator. Switch four
(4) is used to set whether the RA displays zones 1 - 13 or
zones 14 - 25. See the figure below for valid addresses. A
lamp test can be performed by pressing and holding the
local silence button for 3 seconds when the system status
is normal.

1
ON
OFF

1234

3.6 2500 KEYPAD ADDRESS SETTINGS

Zones 1 - 13

The keypad has a four position DIP switch on the circuit
board to set the address and supervision. To change the
keypad to unsupervised, move DIP switch 4 to the ON
position. To change the address, the DIP switch setting
must be positioned according to the figure below:

ON
OFF

1234

Zones 14 - 25

OFF

Figure 3.8 2500-RA/RADVR Address Switch Settings

1234

The 2501 FACP supports four supervised remote annunciators at addresses 1 through 4.

ON
OFF

1234

1234
UNSUPERVISED

Figure 3.6 2500 Keypad Address Switch Settings

Sentrol 1-800-547-2556

3.9 2500-LEM/LRM
The LEM/LRM module has a slide switch that must be set
to determine the functionality of the module. Set the
switch accordingly. In addition, another slide switch
must be set to the normal position for proper operation.
This switch can also be set in the Disconnect position
resulting in a system trouble. This prevents the 2501
FACP from triggering the device connected to the FACP
during installation and testing. A lamp test switch is
provided on the module to test the condition of the
trouble LED.

Sentrol 1-800-547-2556

product

sentrol

Black

Red

Red with
White Stripe
Black with
White Stripe

+
-

Spade Lugs to Battery #2

Fuse Type: AGC 15 32V

+
-

Databus
Connector
(Power-Limited)

B+

ZONE 1
BA+

A-

B+

ZONE 2
BA+

A-

Model 2502A** Terminal Labeling

Unit shown is a model 2504 with four
Class B zones. A model 2502 (two
Class B zones) will be the same
except TB1 will be four positions
(Zone 1 and Zone 2 only). Model
2502A** (two Class A zones) will
have eight terminal block positions
labeled as shown.

The ESL 2501 (FACP) is equipped with
a “Battery Saving Switching Mechanism”
U.S. Patent No.: 5,804,891.

CleanMe® is a registered trademark
of Sentrol and is protected under the
following U.S. Patent No.: 5,708,414.

P11 from
power supply

J11

TROUBLE
SILENCE

ZONE 1
TRBL

ZONE 1
ALM

BMB

DIS
SWT

ZONE 2
B+
B-

RELAY 2

ZONE 3
B+
B-

RELAY 4

RELAY 3

ZONE 4
B+
B-

COM

Databus
COM
RELAY 1
Connector
NO

ZEM

NORM

Zone Function
Select Jumper

P6 from power supply

ZEM

AA+
BBELL 3

AA+
ZONE 1

Optional
BELL EXPANDER

Supervised and Power-Limited

ZONE 1
BB+

B+

BB+
BELL 1

Supervised and Power-Limited

A+
BBELL 4

AA+
BELL 1

B+

B+
BZONE 1

2.7k
EOL
Zone 1

JP3

JP2

Green

White

Black

Wire Nut

Connect to
Power-Limited
Supervised
Lines Only

** Not available at this time.

64600403C

No other initiating devices shall be connected to
these circuits unless approved by the local authority
having jurisdiction.

* Consult smoke detector for information

This unit may be programmed for alarm verification
that will result in a delay of the system alarm signal.
The total delay (control unit plus smoke detector)
shall not exceed 60 seconds. If installed in
accordance with the California State Fire Marshals
Office, the total delay is not to exceed 30 sec.
Circuit
Control unit
Smoke Detector
(zone)
delaymodel delaysec.
sec.

WARNING

Not suitable for remote station protected
premises service where separate transmission
circuits are required for fire, supervisory (if
applicable) and trouble signals.

All circuits except drill test, the auxiliary alarm
control, and the system trouble contacts are
supervised.

Safety Ground (Green)

AC Rtn (White)

AC In (Black)

(Wires 120 VA 50/60Hz)

NOTE
Connection from Power
Supply. Power Supply is
mounted under the BMB.
AC wiring is located on
the Power Supply board
behind the BMB.

Refer to the ESL2501 Fire Alarm Control
Panel Installation and Operation Manuals
64812711 and 64812828 for additional
information.

For service contact:

Databus
Connector (Power-Limited)

This unit is shown with an optional
zone follower module (ZRM-4). A
two zone follower module is
available for the 2502 and 2502A**.

IN FOR
ZONE 1
J13B
CLASS

Owners Instruction Notice:
“Not to be removed by anyone
except occupant.”

WARNING

Initiating circuit shown Class B (Style B). Notification circuits shown
Class B (Style Y). Optional notification circuits capable of Class A
(Style Z). See installation instructions for more information.

LOW
BELL1
BELL2
DET
BELL4 BELL3 GND LOW
CPU
BELL
FAULT SILENCE TROUBLE TROUBLE FAULT NO AC NO BATT TROUBLE TROUBLE MAINT

A-

BB+
BELL 2

2.7k
EOL

Supervised and Power-Limited
2.7k
EOL

ALARM ALARM ALARM ALARM
ZONE 1 ZONE 2 ZONE 3 ZONE 4
TRBL
TRBL
TRBL
TRBL

AA+
BELL 2

Databus
Connector

POWER

Optional
ZRM

TB1

Connectors from
Power Supply

* Suitable for installation as Style D Proprietary Multiplex System or Central Station Type 3 Multiplex
System. Installation limits under jurisdiction of local authority.

Testing - In a household fire warning system,
test weekly. Disconnect the AC power source
during testing. If after testing low battery condition
exists, replace the batteries. This equipment
should be installed in accordance with the
National Fire Protection Association’s standard
72 (NFPA, Batterymarch Park, Quincy, MA
02269). Printed information describing proper
installation, operation, testing, maintenance,
evacuation planning and repair service is to be
provided with this equipment.

The following applies to NFPA 72 household
installations:

SYS
TRBL

SYS
SUP

ALARM
SILENCE

Programming Switch

SYS
ALM

AC
PWR

SYSTEM
RESET

Power-Limited
- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

Connect to
Power-Limited
Supervised
Lines Only

Power
ON
Standby
Condition

DRILL
NEG TEST

Optional
Drill Test
Switch

BMB Standoff (1 of 6)

System
Trouble
Contacts

Auxiliary
Alarm
Contacts

Not Supervised.
For Connection to
Power-Limited
Sources Only.

Spade Lugs to Battery #1

Devices that operate over the full range
of 8.5 to 33 VDC will draw more current
when they are powered by 12 VDC
versus 24 VDC.

WARNING

Note: The typical battery life is 3 to 5
years, depending on usage. When
replacing batteries, always replace both
batteries, even if only one appears dead.
See manufacturer’s specifications for
the recommended batteries used.
Recommended batteries are YuasaExide models NP18-12B and NP7-12.

(+) battery leads fused at 15 Amp.

12V 17.2AH
See instruction manual part number
64812711

BATTERIES

Type of system:
NFPA 72 - Central Station Signaling Systems
(protected premises) with 2500-DAC
NFPA 72 - Local
NFPA 72 - Household fire warning system
NFPA 72 - Remote Station Signaling Systems
(protected premises) with 2500-DAC
NFPA 72 - Proprietary Protected Premises Unit *
Type of signaling service:
Manual fire alarm, automatic fire alarm, elevator recall,
waterflow alarm, supervisory fire alarm, (NFPA 72).
Type of signal:
Non-coded, DACT
Compatibility identifier:
C01 Initiating circuit resistance = 30 Ohm max.
C01A Initiating circuit resistance = 30 Ohm max.**
CSFM Number: 7165-1459:111

ESL 2501 Fire Alarm Control Panel

DATABUS

ESL

Zone 2

LRM/LEM

GREEN WHITE
+12V DAT A DAT B NEG

Sentrol Controls Group
1510 Tate Blvd. SE, Hickory, NC 28603
Sales: 800.547.2556 Technical Service: 800.800.2027

Zone 3

Sentrol 1-800-547-2556
Zone 4

COMMON ALARM COMMON TROUBLE
NC COM NO NO COM NC

Zone 5

Power-Limited

Figure 3.0 2501 (FACP) Interconnect Diagram

NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

COMMON ALARM COMMON TROUBLE
NC COM NO NO COM NC

BB+
BELL 1

B+
BZONE 1

AA+
ZONE 1

J13

A-

B+

A+
BBELL 4

A+
BBELL 3

B+

BELL EXPANDER

LINE 2

LINE 1

LRM/LEM

DAC Placement

GREEN WHITE
+12V DAT A DAT B NEG

BMB Placement

AA+
BELL 1

DAC

J1
DATABUS

BMB

Databus
Cable Routing

ALIVE

Databus
Connector

Databus
Cable Routing

TRBLE
LINE1
FAULT
LINE2
FAULT

SW1

LINE1
IN USE

NORM

Databus
Connector

LINE2
IN USE

DIS

PROGRAM

Connectors from
Power Supply

SWT

CPU
BELL
GND
BELL4 BELL3
FAULT SILENCE TROUBLE TROUBLE FAULT

POWER

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

ALARM
ZONE 3
TRBL

POWER

ALARM
ZONE 4
TRBL

ZEM
ZEM and ZRM
Placement

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

ALARM
ZONE 3
TRBL

COM

RELAY 1

ZRM

COM

RELAY 1

COM
NO
NC

RELAY 2

COM

ZRM

COM
NO

RELAY 3

NC
COM

RELAY 4

RELAY 4
NC
COM

NO
TB1

TB1

NC
COM

ZONE 4
B+
B-

NEG

ALARM
ZONE 4
TRBL

NC
COM

TB1

ZONE 3
B+
B-

ALARM
ZONE 3
TRBL

COM

RELAY 4

ZONE 2
B+
B-

ALARM
ZONE 2
TRBL

Z5 IN TRB IN +24V

ZEM

NO
RELAY 3

COM

ZONE 1
BB+

Z4 IN

NC
RELAY 2

COM
NO

RELAY 3

ALARM
ZONE 1
TRBL

Z3 IN

ZRM

POWER

ALARM
ZONE 4
TRBL

Z2 IN

NO
RELAY 2

Z1 IN

ZEM
NC

RELAY 1

LOW
LOW
BELL1
BELL2
DET
NO AC NO BATT TROUBLE TROUBLE MAINT

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

Batteries

Figure 3.1b Internal Panel Configuration with DAC

Sentrol 1-800-547-2556

Databus
Cable Routing

NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

A-

B+

A+
BBELL 4

A+
BBELL 3

B+

BELL EXPANDER

LEM/LRM
Placement

J2
LAMP TEST
GREEN WHITE
+12V DAT A DAT B NEG

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

BMB Placement

LRM/LEM

J13

TROUBLE

LEM/LRM
NORMAL

LEM

BMB

Databus
Cable Routing

DISCONNECT

NORM

Connectors from
Power Supply

Databus
Connector

DIS

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

ALARM
ZONE 3
TRBL

POWER

ALARM
ZONE 4
TRBL

ZEM
ZEM and ZRM
Placement

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

RELAY 1

COM

RELAY 1

ZRM

COM

RELAY 1

COM
NO
NC

RELAY 2

COM

ZRM

COM
NO

RELAY 3

COM

ALARM
ZONE 4
TRBL

ZEM

NO
RELAY 3

NC
COM

RELAY 4

RELAY 4
NC

COM

ZONE 4
B+
B-

TB1

NC
COM

TB1

ZONE 3
B+
B-

ALARM
ZONE 3
TRBL

NC
RELAY 2

COM

ZONE 2
B+
B-

ALARM
ZONE 2
TRBL

NO
RELAY 3

ALARM
ZONE 1
TRBL

NC
RELAY 2

POWER

ALARM
ZONE 4
TRBL

ZEM

ZONE 1
BB+

B-

LOW
LOW
BELL1
BELL2
DET
NO AC NO BATT TROUBLE TROUBLE MAINT

ALARM
ZONE 3
TRBL

ZRM

B+

B-

SWT

CPU
BELL
GND
BELL4 BELL3
FAULT SILENCE TROUBLE TROUBLE FAULT

POWER

LEM

B+

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

Batteries

Figure 3.1c Internal Panel Configuration with LEM/LRM

Sentrol 1-800-547-2556

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

LRM/LEM

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

JP2 IN FOR
ZONE 1
CLASS B
JP3

DATABUS

GREEN WHITE
+12V DAT A DAT B NEG

NEG

BMB

NORM
WT

DIS

SWT

NORM
DIS

ALARM ALARM ALARM ALARM
ZONE 1 ZONE 2 ZONE 3 ZONE 4
TRBL
TRBL
TRBL
TRBL

POWER

ZEM

NORM
DIS

NORM

DIS

SWT

NORM
DIS

SWT

NORM
WT

DIS

SWT

Databus
COM
RELAY 1
Connector
NO

Databus
Connector

SWT

Function Jumper

RELAY 2

Optional
ZRM

ZEM

COM
NO

RELAY 3

RELAY 4

Zone 5

Zone 4

Zone 3

Zone 2

COM
NO

TB1
ZONE 1
BB+

Figure 3.4 Function Jumper Diagram

Sentrol 1-800-547-2556

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

3.10 INSTALLING THE ZEM, BMB,
AND DAC

NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

GREEN WHITE
+12V DAT A DAT B NEG

LRM/LEM

COMMON ALARM COMMON TROUBLE
NC COM NO NO COM NC

BMB

Databus
Connector

NORM

Databus
Connector

Connectors from
Power Supply

DIS
SWT

GND
BELL4 BELL3
CPU
BELL
FAULT SILENCE TROUBLE TROUBLE FAULT

LOW
LOW
BELL1
BELL2
DET
NO AC NO BATT TROUBLE TROUBLE MAINT

LINE 2

LINE 1

DAC
J1
DATABUS

ALIVE
TRBLE
LINE1
FAULT
LINE2
FAULT

SW1

LINE1
IN USE

Z1 IN

POWER

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

ALARM
ZONE 3
TRBL

Z2 IN

Z3 IN

Z4 IN

Z5 IN TRB IN +24V

PROGRAM

LINE2
IN USE

NEG

ALARM
ZONE 4
TRBL

TB1

ZEM

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

Figure 3.10 ZEM, BMB, and DAC Installation Diagram

Sentrol 1-800-547-2556

3.11 INSTALLING THE BELL, ZRM
AND LEM/LRM

A-

A+
BBELL 4

B+

A-

A+
BBELL 3

B+

BELL EXPANDER

LAMP TEST

TROUBLE

LEM/LRM
NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

NORMAL

LRM/LEM

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

GREEN WHITE
+12V DAT A DAT B NEG

DISCONNECT

BMB

B-

Databus
Connector

DIS
SWT

GND
BELL4 BELL3
CPU
BELL
FAULT SILENCE TROUBLE TROUBLE FAULT

POWER

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

ALARM
ZONE 3
TRBL

LOW
LOW
BELL1
BELL2
DET
NO AC NO BATT TROUBLE TROUBLE MAINT

ALARM
ZONE 4
TRBL

TB1

ZEM

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

NC
RELAY 1

COM
NO
NC

RELAY 2

ZRM

COM
NO

RELAY 3

NC
COM
NO

RELAY 4
NC
COM
NO

Figure 3.11 BELL, ZRM and LEM/LRM Installation Diagram

Sentrol 1-800-547-2556

LEM

B+

NORM

Connectors from
Power Supply

Databus
Connector

LEM

3.12 INSTALLING THE ZONE
DESCRIPTION CARD

Place Zone Description Card
for Zone 1 Here
ZONE

DESCRIPTION

Place Zone Description Card
for First ZEM Here
ZONE

DESCRIPTION

NOTE: THIS IS VIEWED FROM INSIDE OF DOOR

Figure 3.12 Zone Description Card Diagram

Sentrol 1-800-547-2556

+ + - -

Figure 4.0a Class B System Installation Diagram without ZEM

Sentrol 1-800-547-2556

Notification
Appliances

+ + - COMMON ALA
NC COM

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24
BB+
BELL 2

BMB

AA+
BELL 2

AA+
BELL 1

2.7K
EOL

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

JP3

JP2
IN FOR
ZONE 1
CLASS B

Zone 1 is shown with 4-wire detectors,
wired in Class B (Style B)

2.7K
EOL

NOTE: Use EOL resistors (provided) for all initiating and NAC circuits.

NEG

NAC Circuit 1 shown with
Class B (Style Y) wiring

2.7K
EOL

+ + - -

LRM/LEM

32
204-12/24V
Power supervision relay

449C

Caution: Break the wire at each terminal to ensure that the connections are
supervised - Do not loop the wire under the terminals.

4.0

FIELD WIRING

Class B Wiring Diagram

+ + - -

Figure 4.0b Class B System Installation Diagram with ZEM
429C

429C

- - + +
- - + +

Sentrol 1-800-547-2556

4 Pin to 4 Pin
Cable Assembly

ZONE 3
B+
B-

2.7K
EOL

ZONE 2
B+
B-

2.7K
EOL

Databus
Connector

ZONE 4
B+
B-

SWT

NORM
DIS

Caution: Break the wire at each terminal to ensure that the connections are
supervised - Do not loop the wire under the terminals.

Zone 5 is shown with 2-wire
heat detectors and pull stations,
wired in Class B (Style B)

2.7K
EOL

Heat Sensor

BELL2
DET
LOW
LOW
BELL1
NO AC NO BATT TROUBLE TROUBLE MAINT

Pull Station

GND
CPU
BELL
BELL4 BELL3
FAULT SILENCE TROUBLE TROUBLE FAULT

BMB

Zone 2 is shown with
2-wire detectors,
wired in Class B (Style B)

TB1

NOTE: Use EOL resistors (provided) for all initiating and NAC circuits.

2.7K
EOL

ZONE 1
BB+

Zone 2

ZEM
(2504)
Zone 3

Databus
Connector

Zone 4

Databus
Connector

Connectors from
Power Supply

Zone 5

4.1 DETAIL INSTALLATION GUIDE
The initiating device circuits and notification appliance
circuits of the ESL 2501 Fire Alarm Control Panel are
classified as power limited circuits. These circuits can be
installed using any of the methods permitted by Article
760 of the National Electrical Code (NEC), NFPA 70-1996,
for power limited fire alarm (PLFA) circuits. See 760-52
of NFPA 70-1996.

Non-power limited fire alarm system wiring may be
installed using any of the methods permitted by Article
760 of the National Electrical Code (NEC), NFPA 70-1996,
for non-power limited fire alarm (NPLFA) circuits. See
760-21to 760-31 of NFPA 70-1996.
The circuit conductors of a power limited fire alarm
circuits must be separated from non-power limited fire
alarm circuits and ordinary light and power circuits
pursuant to the requirements of Article 760-54 of the
NEC. Figures 4.1a and 4.1b show one method of routing
conductors that can be used to comply with the required
1/4 inch separations.

The following circuits are classified as non-power limited
fire alarm (NPLFA) circuits:
•
Wiring connected to “dry” TROUBLE relay contacts
•
Wiring connected to “dry” ALARM relay contacts
•
Wiring extending from the Digital Alarm Communicator (DAC) to the telephone system
•
Wiring extending from “dry” Zone Relay contacts
•
Wiring extending from the 2500-RADVR output
connector
Power-Limited
(Bell Circuit, #2 and #4)
Power-Limited
(Aux Power and
Power Booster Circuits)

Power-Limited
Zone 1 Initiating Circuits
(NAC Circuit #1 and #3)
120VAC

Power-Limited
Telephone
Line 2

Earth Ground

For Connection to
Power-Limited
Sources Only

Drill Test
Common Alarm and
Common Trouble
Contacts

NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

B+
BZONE 1

AA+
ZONE 1

JP2

A-

B+

A+
BBELL 4

A+
BBELL 3

B+

BELL EXPANDER

LINE 2

LINE 1

Power-Limited
Telephone
Line 1

LRM/LEM

A-

IN FOR
ZONE 1
CLASS B

GREEN WHITE
+12V DAT A DAT B NEG

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

JP3

DAC

J1
DATABUS

BMB

ALIVE
TRBLE
LINE1
FAULT

Battery
Connection
Circuits

LINE2
FAULT

SW1

LINE2
IN USE

DIS
SWT

GND
BELL4 BELL3
CPU
BELL
FAULT SILENCE TROUBLE TROUBLE FAULT

POWER

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

ALARM
ZONE 3
TRBL

POWER

ALARM
ZONE 4
TRBL

ZEM

Power-Limited
24VDC, 12VDC,
and 27.6VDC

RELAY 1

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

ZEM
NC
COM

RELAY 1

ZRM

NO
RELAY 3

NC
COM

NC
COM
NO
NC
RELAY 2

ZRM

COM
NO

RELAY 3

NC
COM
NO

RELAY 4

COM

ZONE 4
B+
B-

NEG

ALARM
ZONE 4
TRBL

COM

Zone Relay
Module Circuits

TB1

ZONE 3
B+
B-

Z5 IN TRB IN +24V

ALARM
ZONE 3
TRBL

RELAY 1

COM

TB1

ZONE 2
B+
B-

Z4 IN

NC
RELAY 2

RELAY 4

ZONE 1
BB+

Z3 IN

ALARM
ZONE 2
TRBL

COM
NO

RELAY 3

Z2 IN

ALARM
ZONE 1
TRBL

ZEM

ZRM

Z1 IN

POWER

ALARM
ZONE 4
TRBL

COM
NO

RELAY 2

LOW
LOW
BELL1
BELL2
DET
NO AC NO BATT TROUBLE TROUBLE MAINT

ALARM
ZONE 3
TRBL

PROGRAM

Databus
Connector

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

Power-Limited
(Zones 2-13)
Initiating Circuits

Cable Tie Holder

Install Tie
Wrap Here
Cabling

Figure 4.1a Power-Limited Routing with DAC

LINE1
IN USE

NORM

Connectors from
Power Supply

Sentrol 1-800-547-2556

Power-Limited
(Bell Circuit, #2 and #4)
Power-Limited
(Aux Power and
Power Booster Circuits)

Power-Limited
Zone 1 Initiating Circuits
(NAC Circuit #1 and #3)
120VAC

Earth Ground

For Connection to
Power-Limited
Sources Only

NEG

DRILL
TEST

- PWR + SWITCH AUX NEG
BOOSTER AUX12/24 12/24

AA+
BELL 2

BB+
BELL 2

AA+
BELL 1

BB+
BELL 1

AA+
ZONE 1

B+
BZONE 1

COMMON ALARM COMMON TROUBLE
NO COM NC
NC COM NO

LEM/LRM
Circuits

A-

B+

A+
BBELL 4

A+
BBELL 3

B+

BELL EXPANDER

LRM/LEM

LAMP TEST

GREEN WHITE
+12V DAT A DAT B NEG

Drill Test
Common Alarm and
Common Trouble
Contacts

TROUBLE

LEM/LRM
NORMAL

LEM

BMB
DISCONNECT

Battery
Connection
Circuits

LEM

B+
NORM

Connectors from
Power Supply

Databus
Connector

B-

DIS
SWT

GND
BELL4 BELL3
CPU
BELL
FAULT SILENCE TROUBLE TROUBLE FAULT

POWER

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

ALARM
ZONE 3
TRBL

POWER

ALARM
ZONE 4
TRBL

ZEM

Power-Limited
24VDC, 12VDC,
and 27.6VDC

ALARM
ZONE 1
TRBL

ALARM
ZONE 2
TRBL

RELAY 2

RELAY 1

ALARM
ZONE 4
TRBL

ZEM
NC

COM

RELAY 1

COM

RELAY 2

ZRM

NO
RELAY 3

RELAY 2

COM

RELAY 4

ZRM

COM
NO

RELAY 3

NC
COM
NO

RELAY 4

RELAY 4
NC

COM

ZONE 4
B+
B-

Zone Relay
Module Circuits

TB1

NC
COM

TB1

ZONE 3
B+
B-

ALARM
ZONE 3
TRBL

ZONE 2
B+
B-

ALARM
ZONE 2
TRBL

NC
COM

RELAY 3

ALARM
ZONE 1
TRBL

COM

RELAY 1

ZONE 1
BB+

POWER

ALARM
ZONE 4
TRBL

ZEM
NC

ZRM

LOW
LOW
BELL1
BELL2
DET
NO AC NO BATT TROUBLE TROUBLE MAINT

ALARM
ZONE 3
TRBL

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

ZONE 1
BB+

ZONE 2
B+
B-

ZONE 3
B+
B-

ZONE 4
B+
B-

Power-Limited
(Zones 2-13)
Initiating Circuits

Cable Tie Holder

Install Tie
Wrap Here
Cabling

Figure 4.1b Power-Limited Routing with LEM/LRM

Sentrol 1-800-547-2556

•

The ground connection to the ESL 2501 is made via
the green wire of the FACP power supply. Using a
Listed splice connector, secure a minimum 14 gauge
solid ground wire to the green wire, the earth ground
connection, on the control panel. Attach the earth
ground wire to a bonded earth ground. Be sure to
keep the wire runs short and avoid 90o or sharp
turns. Bends must have a minimum radius of eight
inches. The ground wires must be routed separately
and toward the earth. Always use eight-foot copper
clad ground rods. Never run parallel to metal without
properly bonding to that metal.

Verify wire sizes are adequate for all notification and
initiating circuits. The maximum allowable initiating
zone resistance is 30 Ohms. See Figure 4.1c below:

Gauge

Ohms per 1000 Ft @ 20OC
of single conductor copper wire

1.6

2.5

4.0

6.4

•

Run initiating device circuit wires separately. Most
supervised circuits use voltage or current sensing
initiating device methods that are very sensitive to
induced voltages on the wiring. Therefore, under no
circumstances run AC power, speaker, public
address, intercom, or switch control wiring with
inductive loads in the same conduit or the immediate
vicinity of the control wiring.

•

Do not overlook adequate lightning protection.
Lightning damage commonly occurs from four
sources:
1. Through alarm loop wiring
2. Through AC power inputs
3. Through telephone connections (if used)
4. Through earth ground or power ground connections.

Figure 4.1c Wire Resistance Table

Many audible/visual notification appliances cannot
tolerate more than a 20% voltage drop from the specified
device voltages. See Figure 4.1d below to determine
maximum distance for wire gauge used.
Total current
device

Max. ft. of paired wire from B+ to EOL resistor load (Amps)

18AWG

16AWG

14AWG

12AWG

.100

1500

2500

4000

6200

.500

300

500

800

1290

1.000

150

250

400

620

Figure 4.1d Alarm Notification Appliance Circuit (NAC) Wire
Size Table (Maximum voltage drop allowable: 2VDC)

•

Incoming AC voltage should be stable at a nominal
120 Volts. This is especially important in new
construction where incoming power may be high or
unstable with temporary connections often causing
large, inductive voltage spikes.
Ground the system properly. All of the voltage
transient suppression in the ESL 2501 Fire Alarm
Control Panel is referenced to earth ground. It is
important that the earth ground connection of the
FACP be of the lowest possible impedance and that
the possibility of voltage differences between the
FACP ground and that of the telephone and public
utility power systems be minimized. For this reason
the ideal ground for the fire alarm panel is the
“unified earth ground”. A unified earth ground bonds
together the ground rods for the power lines, telephone, and fire alarm control panel. See Figure 4.1e.
This reduces the chance of step voltage blowout, a
problem that may occur during lightning strikes.
Refer to NEC Article 250 for proper grounding
requirements.

The ESL 2501 uses state-of-the-art suppression techniques to minimize the potential for damage due to
lightning via each of these routes. However, this does not
obviate the need to ensure that proper lightning suppression equipment has been installed at the point where both
the public utility power and telephone service enter the
building. Refer to Article 250 of the NEC for these
criteria.
There is no known protective device available which is
capable of protecting equipment from damage caused by
“direct hit” strikes of lightning due to extremely high
energy released (10 million to 100 million Volts @ 10,000
to 30,000 Amps).
The effects of the electro-magnetic pulse (EMP) from a
lightning strike can be minimized by avoiding running
wiring long distances across the ceiling or roof of a
building prone to lightning strike or along vertical
structural steel members expected to conduct lightning
currents. Lightning protection designed, installed and
maintained in accordance with the requirements of NFPA
77 will minimize the effects of a lightning strike on the
building structure as well as the fire alarm system.
Additional protection is suggested in areas subject to
above average lightning activity or induced voltage spikes
and fluctuations due to power line load switching.

Sentrol 1-800-547-2556

Incoming
Power Lines

Control
Panel

Control Panel
Earth Ground

Incoming
Phone Lines

4.3 ALARM INITIATING DEVICES
This section describes how to field wire initiating devices
such as smoke detectors, pull stations, heat detectors, and
waterflow alarm devices. Each zone may be programmed
individually; refer to Programming, Section 5.0. Refer to
Figures 4.0a & 4.0b for Class B (Style B) wiring.

Power Line
Earth Ground

Phone Line
Earth Ground
Unified Earth Ground
with Bonded Ground Rods

4.3.1 TWO-WIRE SMOKE DETECTORS

Figure 4.1e Unified Earth Ground

NOTE:

4.2 FIELD WIRING CHECKOUT
PROCEDURES

•

Connect only two-wire smoke detectors UL
Listed as compatible to the 2501 (FACP). Refer
to Appendix A.

•

Two-wire detectors receive their power directly
from the zone terminals and transmit the alarm
signal through the same wires. Be certain to
observe polarity when installing detectors.

•

Up to twenty (20) detectors may be wired to
each zone. All initiating devices must be wired
correctly for proper supervision with an end-ofline 2.7K Ω 1/2W resistor (provided) installed
after the last device.

•

Wiring the ESL 521 Series two-wire detector
with automatic maintenance reporting is the
same as wiring standard two-wire detectors and
the CleanMe® signal is automatically monitored.
Up to twenty (20) ESL 521 Series smoke
detectors may be wired to each zone. Refer to
the documentation included with the ESL 521
Series detector for additional installation
instructions. Note that an ESL 505 module is
not required for the 2501 (FACP) zones.

NOTE: MAKE SURE THAT AC AND BATTERY POWER
ARE DISCONNECTED BEFORE PROCEEDING.
1.

Test all field wiring before connecting any equipment.
A.

Insure no unwanted voltages are present on
circuit conductors and ground. They are a
hazard and may prevent proper system operation.

All wiring except those intentionally and
permanently grounded must be tested for
isolation from ground using an insulation testing
device such as a “Megger”.

NOTE: Caution must be exercised when using voltage
generating test instruments such as a “Megger”.
Damage to equipment could result if the equipment is connected (wired) during wiring tests.
C.

All wiring, other than those intentionally
connected together, must be tested for conductor-to-conductor isolation using an insulation
testing device.

With each circuit pair short-circuited at the end of
the circuit, measure circuit resistance with an
Ohmmeter.
Perform testing as described previously after any
addition, deletion, or mechanical or electrical
damage to the system has occurred.

See Figures 4.0a & 4.0b for Class B (Style B) connection
to the panel.

4.3.2 FOUR-WIRE SMOKE DETECTORS
NOTE:

•

Four-wire detector power is supplied by
“SWITCHED AUX 12/24”. DO NOT exceed 1.0
Amp total between “SWITCHED AUX 12/24”
AND “AUX 12/24”. When in battery saver mode,
do not exceed 0.5 amp total.

•

Always supervise four-wire detector power with
an end-of-line power supervisory device (ESL
model 204-12/24 V) after the last unit.

See Figures 4.0a & 4.0b for Class B (Style B) connection
to the panel.

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NOTE: There are two important cautions that should be
observed. First, if the detectors being used are
equipped with integral Trouble (Fault) relay contacts
these contacts must be wired such that the first Trouble
(Fault) contact is beyond (further from the control
panel) the last Alarm contact in the circuit. Second, the
battery saver function drops the system operating power
supply to 12 volts, DC Be certain that the detectors
being used will operate at that potential. If the battery
saver function is switched off the switched auxiliary
power potential will remain at 24 volts.

4.3.3 SPRINKLER SYSTEM WATERFLOW
AND SUPERVISORY DEVICES
Normally open contact type waterflow alarm devices may
be connected, along with conventional manual alarm
stations or heat detectors. All zones to which waterflow
alarm devices are connected must be programmed so that
the system alarm indicating devices cannot be silenced.
See Programming, Section 5.0.
Supervisory signals for status reporting of waterflow
control valves, supplies, etc. must be connected to a
separate zone, and programmed for supervisory status.
See Programming, Section 5.0.

4.4 ALARM NOTIFICATION APPLIANCES
Use only polarized UL Listed compatible notification
appliances rated for 24 VDC (see list of devices in
Appendix A). See Figures 4.0a & 4.0b for Class B (Style
Y) connection to the panel.
The BMB provides two notification appliance circuits that
may be expanded to four (two additional) with the
ESL2500-BELL. Refer to Figure 4.0a for wiring indicating
devices to the BMB.

4.5 ZONE EXPANSION MODULE (ZEM)
CONNECTION
The Zone Expansion Module (ZEM) allows for the
addition of up to 24 initiating device circuits when the
four circuit, Class B modules are used. Since there is one
initiating device circuit integral with the BMB, this results
in a total capacity of 25 initiating device circuits per ESL
2501 FACP. Refer to Figure 1.4, Custom Panel Building
Table for the available ZEM add-on configurations. The
ESL2501 Fire Alarm System enclosure can accommodate
three (3) ZEMs. When the 2501 is configured with
additional ZEMs they are housed in an additional
enclosure, part number 2500-SH.

4.5.1 ESL 2502-ZEM AND ESL 2504-ZEM
The ESL 2502-ZEM is a two zone Class B expander
module and the ESL 2504-ZEM is a four zone Class B
expander module. Refer to Section 3.5, Installing the
ZEM, BMB, and DAC for correct installation of the ZEM
card. Connect the left most databus connector on the
ZEM to the databus connector on the BMB or to the right
most databus connector on a previously installed ZEM
using the provided six inch 4 pin to 4 pin cable assembly.
Assure that all unused zones are terminated with a 2.7KΩ
5% end-of-line resistor (provided). See Figures 4.0a &
4.0b for Class B (Style B) wiring. For zone type selection
see System Programming, Section 5.2.
When using multiple 2502 Class B zone expansion
modules, it will be necessary to leave some panel zones
unused to ensure that the modules LED’s line up with the
correct zone identifiers on the front panel display. For
example, if two 2502-ZEM’s are used, zones 2 and 3 will
be used, then 4 and 5 will be skipped, and zones 6 and 7
will be used for the second 2502-ZEM. Please call Sentrol
Technical Services at 1-800-800-2027 with any questions.
NOTE: For best zone LED alignment results, do not use
multiple two zone expansion modules (2502-ZEM) when
a four zone module (2504-ZEM) can be used.

NOTE: Maximum notification current is 1.5 Amps per notification appliance circuit; TOTAL OPERATING CURRENT CANNOT EXCEED 6.0 AMPS. Choose the correct
wire size so that the maximum voltage drop of 2 VDC at
furthest device on circuit is not exceeded. (see Figure 4.1c).

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4.6 SUPPLEMENTARY CONTACTS
CONNECTION

4.7 CONNECTION TO SUPERVISING
STATION FIRE ALARM SYSTEMS

This section describes how to wire Supplementary Alarm
and Trouble Contacts and the optional Zone Relay Modules.
NOTE: Supplementary Alarm and Trouble Contacts are
for power-limited applications only. (See Section 4.1,
Installation Recommendations/Precautions).

The ESL 2501 FACP is designed to permit transmission of
fire alarm signals from the protected premises to a
Supervising Station Fire Alarm Panel at a Central Station
or Remote Supervising Station by means of an add-on
module that utilizes Digital Alarm Communicator (DAC)
technology, the 2500-DAC.

4.6.1 SUPPLEMENTARY ALARM CONTACTS

4.7.1 CONNECTING THE 2500-DAC

Dry, Form “C” contacts are provided for controlling
supplementary alarm functions from the BMB. Contacts
are rated 2A @ 30 VDC resistive. The terminals are
Common Alarm NC, COM, and NO. Contacts transfer in
alarm.

The 2500-DAC, Digital Alarm Communicator, is installed
in a dedicated location, adjacent to the BMB of the ESL
2501 Fire Alarm Control Panel. It provides for the
connection of both the primary and stand-by telephone
lines via the standard telco connectors. Figure 4.7.1
illustrates the wiring required to provide signaling to a
Supervising Station Fire Alarm System from a single ESL
2501 FACP.

4.6.2 SUPPLEMENTARY TROUBLE CONTACTS
Dry, Form “C” contacts are provided for controlling
supplementary trouble (fault) functions from the BMB.
Contacts are rated 2A @ 30 VDC resistive. The terminals
are Common Trouble NC, COM, and NO. The trouble
relay is normally energized and will de-energize if AC
and/or battery power or any other system trouble occurs.
For use with door holders, the supplementary trouble
contacts are programmable for transfer on loss of AC
only. Additionally, if the system is programmed for use
with a 2500-DAC, the contacts are automatically programmed so that they will not transfer on loss of AC only.
The batteries must also be low. This provides the required
delayed reporting at loss of AC. See Section 5.0 Programming.

4.6.3 ZONE RELAY MODULE (ZRM)
(OPTIONAL)
The Zone Relay Module (ZRM) is a zone follower and each
relay follows its corresponding zone on a Zone Expansion
Module (ZEM). Zone 1 on the BMB does not have a
corresponding Zone Relay Module and will only trigger
the Common Alarm relay. The ZRM’s plug directly into
the ZEM’s and only require wiring the terminals labeled
NO, COM, and NC. Each relay has dry, Form “C”
contacts rated 2A @ 30 VDC resistive.
NOTE: Circuits connected to a ZRM must be power-limited.

Sentrol 1-800-547-2556

Phone
Lines

Ground Fault Cable

B+
BZONE 1
JP2
IN FOR
ZONE 1
CLASS B

BMB

LINE 2

LINE 1

DAC

Cable
Assembly

DATABUS

Databus
Connector

LRM/LEM

J13

GREEN WHITE
+12V DAT A DAT B NEG

JP3

ALIVE
TRBLE
LINE1
FAULT
LINE2
FAULT

SW1

LINE1
IN USE

PROGRAM

LINE2
IN USE

OW BELL1
BELL2
DET
ATT TROUBLE TROUBLE MAINT

Z1 IN

Z2 IN

Z3 IN

Z4 IN

Figure 4.7.1 2500-DAC Installation Diagram

Sentrol 1-800-547-2556

Z5 IN TRB IN +24V

NEG

5.1.1 PROGRAMMING INDICATORS

5.0
PROGRAMMING
5.1 INTRODUCTION
At the heart of the ESL 2501 Fire Alarm Control Panel is
a microcomputer that controls all system functions and
the response of the system to incoming signals. A portion
of the microcomputer program is a function map that
serves two purposes. First it tells the microcomputer
what types of modules are installed, ensuring the correct
response when a signal is generated by a given module.
Second, it controls how the system will respond to a given
in-coming signal condition. Items that can be programmed are: types of zone inputs, bell-zone associations,
bell cadence definitions, battery saver mode, AC frequency (60Hz or 50Hz), zone expanders installed,
communicator type, number of supervised keypads,
keypad ability to silence the panel, time of day, communicator information, zone names, and passcodes.
The programming buttons and indicators allow the
installer to modify the most commonly used items in the
function map. A keypad allows modification of all items
in the function map (with the appropriate passcode. See
the keypad manual for more details). Section 5.6,
Programming Matrix indicates which items are only
programmable from the keypad.
When programming the function map from the panel, flip
the daughter board’s overlay over to facilitate programming (see Figure 5.1b). All button and LED references in
the programming sections refer to the ON-BOARD
PROGRAMMING INTERFACE side of the overlay. Also,
install the PROGRAMMING LOCATION LEDS guide on
the Basic Master Board (BMB).

SYS
SUP D3
PROG

UP
SW4

RESET

VALUE
VALUE
SW7

ZONE 1
ALARM

SYS
TRBL
DOWN

SW3

SW2

SW1

SYS
ALM

AC PWR

The 64, 32, 16, 8, 4, 2, and 1 yellow LEDs (located on the
BMB in the lower right-hand corner) display the current
programming location in the programming mode. A
location LED overlay is included in the accessories
envelope included with each panel.

5.1.2 PROGRAMMING BUTTONS
The Basic Master Board (BMB) has 1 push-button (PROG)
to activate and terminate the system programming mode,
1 push-button (LOC/VAL) to switch between location and
value, and 2 push-buttons (UP, DOWN) to increment or
decrement the location/value (see Figure 5.1a).

5.2 SYSTEM PROGRAMMING
The Basic Master Board (BMB) automatically recognizes
when a Zone Expander Module (ZEM) is added to the
panel and programs the module automatically based upon
the module’s address. If two or more modules are set to
the same address, the 2501 (FACP) will indicate trouble
communicating with the modules and will not be able to
indicate alarms or troubles correctly. Likewise, if a ZEM
module is removed without changing the function map to
inform the panel that it is not installed, the panel will
indicate trouble communicating with the module.

ZONE 1
TROUBLE
LOCATION
TRBL
LOCATION
UP
DOWN

ALARM

SW8

The 2501 (FACP) has 16 LEDs that are used for displaying
the system status. Of these, 13 are used for displaying
information while in the front panel programming mode.
The Location (LOC) green LED (located on the daughter
board) starts flashing when the programming mode is
entered. It is used to indicate that the UP/DOWN buttons
will affect the programming location number. The VALUE
red LED (located on the daughter board) flashes to
indicate that the UP/DOWN buttons affect the location’s
value. The 1 and 2 red LEDs, 4 and 8 yellow LEDs
(located on the daughter board) display the programmed
value of the current location in the programming mode.

SW5

To program the panel using the Basic Master Board
(BMB):

SW6

Figure 5.1a BMB Daughter Board Layout

Flip the daughter board’s overlay over so it displays the
side marked ON-BOARD PROGRAMMING INTERFACE. Install the PROGRAMMING LOCATION LEDS
overlay on the Basic Master Board (BMB). If desired,
place the location LED overlay on the LEDs.

Push and hold the PROG button until the LOC LED
begins flashing (approximately 5 seconds). When the
system goes into programming mode, it displays
Location 1 and the current value.

ON-BOARD PROGRAMMING INTERFACE
LED’s 1 - 8 below = Value LED’s
LED’s on BMB = Location LED’s

1
LOC

PROG

VALUE

LOC/VAL
TOGGLE

DOWN

Figure 5.1b On-Board Programming Interface
(Daughter Board Overlay turned over)

Sentrol 1-800-547-2556

Press the LOC/VAL button to switch between
location and value. When the LOC LED is flashing,
pressing the UP or DOWN buttons will increment or
decrement the location displayed. When the VALUE
LED is flashing, pressing the UP or DOWN buttons
will increment or decrement the value of the selected
location. (See Section 5.6, Programming Matrix, for
programmable values of each location). By pushing
and holding the UP or DOWN button, you may
quickly scroll through the location/value numbers.
To exit out of programming mode, press and hold the
PROG button until the LOC or VALUE LEDs stop
flashing (approximately 5 seconds).
To save any value changes made, move to a new
location. The changes to the current location is not
saved if the system times out (10 minutes without a
button press) or if programming mode is exited by
using the PROG button. All changes made to other
locations are saved, only the current location
changes are not saved.

5.3 TIME & DATE PROGRAMMING
The time and date are programmed through Basic Master
Board programming. The date format must be entered as
m/dd/yyyy. The time must be set in military time format,
24:00 hours. (See programming example below.)
See Section 5.6, Programming Matrix for the time and
date programming locations and default values.
EXAMPLE: To set the date to October 9, 1997 and the
time to 5:35 pm
LOCATION
64 32 16 8 4 2 1

VALUE
8 4 2 1

Month (10)
1st Digit of Day (0_)
2nd Digit of Day (_9)
1st Digit of Year (1_ _ _)

The Panel automatically exits out of programming mode if
no activity occurs for 10 minutes. If an alarm occurs
during programming, the panel automatically exits out of
programming.
To program the function map with a keypad, see the ESL
2500 Keypad Instruction Manual 64812808.
See Section 5.6, Programming Matrix for the programming locations and default values.

2nd Digit of Year (_9_ _)
3rd Digit of Year (_ _9_)
4th Digit of Year (_ _ _7)
1st Digit of Hour (1_)
2nd Digit of Hour (_7)
1st Digit of Minute (3_)

NOTE: While in the programming mode, all other
indicating devices will operate as normal. If a zone goes
into alarm while you are in the programming mode, the
alarm sounds and the panel automatically exits out of
programming mode.

2nd Digit of Minute (_ 5)

For example, the month is contained at location 80. The
location is indicated by the LEDs that are lit from the
table above, 64 + 16 = 80. The value is indicated by the
LEDs that are lit; 8 + 2 = 10 or October.
Figure 5.3 Time & Date Programming Example

NOTE: If an invalid date is entered, the 2501 (FACP)
changes the incorrect value to the closest valid value
before saving changes. There is no visible or audible
indication given if an incorrect value is entered during
time and date programming.

Sentrol 1-800-547-2556

5.4 BATTERY SAVER PROGRAMMING
The 2501 (FACP) implements a programmable feature
called the battery saver mode. The purpose of this mode
is to allow the panel to utilize smaller, less expensive
batteries while still meeting standby requirements. This
mode is selected by programming the panel for battery
saver mode (see Section 5.2 System Programming and
Section 5.6 Programming Matrix). After selection of this
feature the operation is completely transparent to the user.
The operation of the panel when battery saver mode is
selected is as follows. The panel will automatically switch
the batteries into parallel upon loss of AC or a low AC
condition. The connection of these batteries in parallel
effectively doubles the standby capacity of the batteries.
The batteries will remain in this condition until AC is
restored or the level is sufficient to restore normal
operation.
While the panel is in standby on the secondary source
(batteries in parallel), the panel continues to operate
normally. If an alarm occurs, the panel automatically
switches the batteries back to a series configuration. This
provides the 24 VDC alarm voltage for the indicating
(NACs).

NOTE: The AUX 12/24 and SWITCHED AUX 12/24 are
always 12 VDC if battery saver mode is selected and 24
VDC if battery saver mode is not selected. The proper
battery calculations must be performed based on the battery saver mode selection (see Appendix B). ESL manufactures a complete line of 12V devices including 12V door
holders and smoke detectors.

5.5 CLEANME® MODE PROGRAMMING
The 2501 (FACP) supports a unique feature implemented
by the ESL 521 series Two-Wire CleanMe ® Smoke
Detector. This feature allows the control panel to receive
a signal from the 521 series detector, notifying the
control panel that the detector has drifted outside of its
UL Listed sensitivity range or has a hardware fault
problem. The CleanMe® signal enables the installer to
receive a warning signal at the panel and the Supervising
Station if the system is monitored. This gives the
installer time to clean the detector by replacing the
optical chamber with a new one thereby reducing
unwarranted alarms. There is no action required to
implement this feature. The control panel automatically
recognizes the signal if present and will turn on the
detector maintenance LED and annunciate a system
trouble. If a DAC is present, the Supervising Station, if
monitored, will be notified.

Programming Value LEDs (4)
(binary values are indicated on each LED)
+12V

TROUBLE
M NC

1
VALUE

LOC
PROG

LOC/VAL
TOGGLE

DOWN

2
1

BMB

Programming
Switch

LOW
BELL1
BELL2
DET
BELL4 BELL3 GND LOW
CPU
BELL
FAULT SILENCE TROUBLE TROUBLE FAULT NO AC NO BATT TROUBLE TROUBLE MAINT

Programming Location LEDs (7)
(binary values are indicated on each LED)

Figure 5.6 LED Location Diagram for Programming Location and Programmed Value

Sentrol 1-800-547-2556

5.6 BMB PROGRAMMING MATRIX
Programming Locations
Loc

Description

Default

Programmed Value
16

Value

Description

Normal Fire

Water Flow

Fire Supervisory

Non-Latching

Verified Fire

Power Boost
(Zone 1 only)

None

Bell 1

Bell 2

Bell 3

Bell 4

Zone Definitions
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

Zone 1
Zone 2
Zone 3
Zone 4
Zone 5
Zone 6
Zone 7
Zone 8
Zone 9
Zone 10
Zone 11
Zone 12
Zone 13
Zone 14
Zone 15
Zone 16
Zone 17
Zone 18
Zone 19
Zone 20
Zone 21
Zone 22
Zone 23
Zone 24
Zone 25

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Zone Bell Association

26
27
28
29
30
31
32
33
34
35
36
37
38
39

Zone 1
Zone 2
Zone 3
Zone 4
Zone 5
Zone 6
Zone 7
Zone 8
Zone 9
Zone 10
Zone 11
Zone 12
Zone 13
Zone 14

15
15
15
15
15
15
15
15
15
15
15
15
15
15

For multiple bells, add together.
ex: Bells 1 & 2 (1 + 2 = 3)

Sentrol 1-800-547-2556

Programming Locations
Loc

Description

Default

Programmed Value
16

Value

Description

Zone Bell Association (cont.)
40
41
42
43
44
45
46
47
48
49
50

Zone 15
Zone 16
Zone 17
Zone 18
Zone 19
Zone 20
Zone 21
Zone 22
Zone 23
Zone 24
Zone 25

15
15
15
15
15
15
15
15
15
15
15

Notification Appliance Circuit Definition

51
52
53
54

Bell 1 Definition
Bell 2 Definition
Bell 3 Definition
Bell 4 Definition

1
1
0
0

Not Used

Temporal Code 3

March Time

California March

Steady

Non-Silenceable Steady

Latching Non-Silenceable
Steady

60 Hz Operation

50 Hz Operation

Not Installed

ZEM

Not Installed

2500-DAC

LEM

LRM

Dual LRM

Battery Saver Mode
55

Batt Saver Mode

AC Cycles
56

AC Sync

Zone Expander Module Definition
57
58
59
60
61
62

Expander 1
Expander 2
Expander 3
Expander 4
Expander 5
Expander 6

1
1
1
1
1
1

Communicator Type
63

Communicator
Type

Sentrol 1-800-547-2556

Programming Locations
Loc

Description

Default

Programmed Value
16

Value

Description

Common Trouble Relay
64

Function

Trouble Resound Time
65

Resound Time

Supervised Keypads
66

Keypads

Normal

AC Loss Only

15 Minutes

1 Hour

4 Hours

24 Hours

None

Keypad 1

Keypad 2

Keypad 3

For multiple keypads, add together.
ex: Keypads 1 & 2 (1 + 2 = 3)
0
1
2
4
8

Remote Annunciators
67

RAs

None
RA 1
RA 2
RA 3
RA 4

For multiple RAs, add together.
ex : RAs 1 & 2 (1 + 2 = 3)

Keypad Silence and Reset
68

Silence & Reset

Disable

Enable

Disable

Enable

Ground Fault Detection
69

Ground Fault
Detection

Reserved
70

Reserved

Sentrol 1-800-547-2556

Programming Locations
Loc

Description

Default

Programmed Value
16

Value

Description

Date Programming

1
80

Month
(m/dd/yyyy)

1st Digit of Day
(m/dd/yyyy)

2nd Digit of Day
(m/dd/yyyy)

1st Digit of Year
(m/dd/yyyy)

2nd Digit of Year
(m/dd/yyyy)

3rd Digit of Year
(m/dd/yyyy)

4th Digit of Year
(m/dd/yyyy)

2
3
4
5
6
7
8
9
10
11
12

Time Programming
0
1
87

1st Digit of Hour
(HH:MM)

2nd Digit of Hour
(HH:MM)

1st Digit of Minute
(HH:MM)

2
3

2nd Digit of Minute 0
(HH:MM)

5
6
7
8
9

Sentrol 1-800-547-2556

The Following Locations Are Only Accessible With a Keypad
Loc

Description

Default

Value

Description

Communications
91

Auto Comm Test on Power-up

0
1

Auto Comm Test Hour

0 - 23

Auto Comm Test Minute

0 - 59

Days Between Auto Comm Tests

0
1 - 255

95
96
97
98
99

Reserved
Reserved
Reserved
Reserved
Reserved

0
0
0
0
0

100
101
102
103

Zone Alarm Report Sequence
Zone Trouble Report Sequence
System Trouble Report Sequence
System Event Report Sequence

3
3
3
3

0
1
2
3
4
5
6
7
8
9
10
11

Disabled
Enabled

Disable Auto Comm Test
Number of Days

No Report
Account 1
Account 2
Account 1, then 2 if 1 fails
Account 2, then 1 if 2 fails
Account 1 and 2
Account 3
Account 3 and 1
Account 3 and 2
Account 3 and 1, then 2 if 1 fails
Account 3 and 2, then 1 if 2 fails
Account 3 and 1 and 2

104 - 109

Account Number 1

000000H

000000H - FFFFFFH

(0H - FH per digit)

110 - 115

Account Number 2

000000H

000000H - FFFFFFH

(0H - FH per digit)

116 - 121

Account Number 3

000000H

000000H - FFFFFFH

(0H - FH per digit)

ZRM Override
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145

Zone 1, ZRM 1
Zone 1, ZRM 2
Zone 1, ZRM 3
Zone 1, ZRM 4
Zone 1, ZRM 5
Zone 1, ZRM 6
Zone 2, ZRM 1
Zone 2, ZRM 2
Zone 2, ZRM 3
Zone 2, ZRM 4
Zone 2, ZRM 5
Zone 2, ZRM 6
Zone 3, ZRM 1
Zone 3. ZRM 2
Zone 3, ZRM 3
Zone 3, ZRM 4
Zone 3, ZRM 5
Zone 3, ZRM 6
Zone 4, ZRM 1
Zone 4, ZRM 2
Zone 4, ZRM 3
Zone 4, ZRM 4
Zone 4, ZRM 5
Zone 4, ZRM 6

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Sentrol 1-800-547-2556

No Overrides

Override Relay 1

Override Relay 2

Override Relay 3

Override Relay 4

For Multiple relays, add together.
ex : Relays 1 & 3 (1 + 4 = 5)

The Following Locations Are Only Accessible With a Keypad
Loc

Description

Default

Value

Description

No Overrides

Override Relay 1

Override Relay 2

Override Relay 3

Override Relay 4

ZRM Override (cont.)
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193

Zone 5, ZRM 1
Zone 5, ZRM 2
Zone 5, ZRM 3
Zone 5, ZRM 4
Zone 5, ZRM 5
Zone 5, ZRM 6
Zone 6, ZRM 1
Zone 6, ZRM 2
Zone 6, ZRM 3
Zone 6, ZRM 4
Zone 6, ZRM 5
Zone 6, ZRM 6
Zone 7, ZRM 1
Zone 7. ZRM 2
Zone 7, ZRM 3
Zone 7, ZRM 4
Zone 7, ZRM 5
Zone 7, ZRM 6
Zone 8, ZRM 1
Zone 8, ZRM 2
Zone 8, ZRM 3
Zone 8, ZRM 4
Zone 8, ZRM 5
Zone 8, ZRM 6
Zone 9, ZRM 1
Zone 9, ZRM 2
Zone 9, ZRM 3
Zone 9, ZRM 4
Zone 9, ZRM 5
Zone 9, ZRM 6
Zone 10, ZRM 1
Zone 10, ZRM 2
Zone 10, ZRM 3
Zone 10, ZRM 4
Zone 10, ZRM 5
Zone 10, ZRM 6
Zone 11, ZRM 1
Zone 11, ZRM 2
Zone 11, ZRM 3
Zone 11, ZRM 4
Zone 11, ZRM 5
Zone 11, ZRM 6
Zone 12, ZRM 1
Zone 12. ZRM 2
Zone 12, ZRM 3
Zone 12, ZRM 4
Zone 12, ZRM 5
Zone 12, ZRM 6

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Sentrol 1-800-547-2556

The Following Locations Are Only Accessible With a Keypad
Loc

Description

Default

Value

Description

No Overrides

Override Relay 1

Override Relay 2

Override Relay 3

Override Relay 4

ZRM Override (cont.)
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241

Zone 13, ZRM 1
Zone 13, ZRM 2
Zone 13, ZRM 3
Zone 13, ZRM 4
Zone 13, ZRM 5
Zone 13, ZRM 6
Zone 14, ZRM 1
Zone 14, ZRM 2
Zone 14, ZRM 3
Zone 14, ZRM 4
Zone 14, ZRM 5
Zone 14, ZRM 6
Zone 15, ZRM 1
Zone 15, ZRM 2
Zone 15, ZRM 3
Zone 15, ZRM 4
Zone 15, ZRM 5
Zone 15, ZRM 6
Zone 16, ZRM 1
Zone 16. ZRM 2
Zone 16, ZRM 3
Zone 16, ZRM 4
Zone 16, ZRM 5
Zone 16, ZRM 6
Zone 17, ZRM 1
Zone 17, ZRM 2
Zone 17, ZRM 3
Zone 17, ZRM 4
Zone 17, ZRM 5
Zone 17, ZRM 6
Zone 18, ZRM 1
Zone 18, ZRM 2
Zone 18, ZRM 3
Zone 18, ZRM 4
Zone 18, ZRM 5
Zone 18, ZRM 6
Zone 19, ZRM 1
Zone 19, ZRM 2
Zone 19, ZRM 3
Zone 19, ZRM 4
Zone 19, ZRM 5
Zone 19, ZRM 6
Zone 20, ZRM 1
Zone 20, ZRM 2
Zone 20, ZRM 3
Zone 20, ZRM 4
Zone 20, ZRM 5
Zone 20, ZRM 6

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Sentrol 1-800-547-2556

The Following Locations Are Only Accessible With a Keypad
Loc

Description

Default

Value

Description

No Overrides

Override Relay 1

Override Relay 2

Override Relay 3

Override Relay 4

00H - FFH

00H - Not Reported

ZRM Override (cont.)
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271

Zone 21, ZRM 1
Zone 21. ZRM 2
Zone 21, ZRM 3
Zone 21, ZRM 4
Zone 21, ZRM 5
Zone 21, ZRM 6
Zone 22, ZRM 1
Zone 22, ZRM 2
Zone 22, ZRM 3
Zone 22, ZRM 4
Zone 22, ZRM 5
Zone 22, ZRM 6
Zone 23, ZRM 1
Zone 23, ZRM 2
Zone 23, ZRM 3
Zone 23, ZRM 4
Zone 23, ZRM 5
Zone 23, ZRM 6
Zone 24, ZRM 1
Zone 24, ZRM 2
Zone 24, ZRM 3
Zone 24, ZRM 4
Zone 24, ZRM 5
Zone 24, ZRM 6
Zone 25, ZRM 1
Zone 25, ZRM 2
Zone 25, ZRM 3
Zone 25, ZRM 4
Zone 25, ZRM 5
Zone 25, ZRM 6

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Pulse Report Codes
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289

Zone 1 Alarm
Zone 2 Alarm
Zone 3 Alarm
Zone 4 Alarm
Zone 5 Alarm
Zone 6 Alarm
Zone 7 Alarm
Zone 8 Alarm
Zone 9 Alarm
Zone 10 Alarm
Zone 11 Alarm
Zone 12 Alarm
Zone 13 Alarm
Zone 14 Alarm
Zone 15 Alarm
Zone 16 Alarm
Zone 17 Alarm
Zone 18 Alarm

31h
32h
33h
34h
35h
36h
37h
38h
39h
3Ah
3Bh
3Ch
3Dh
3Eh
3Fh
61h
62h
63h

Sentrol 1-800-547-2556

The Following Locations Are Only Accessible With a Keypad
Loc

Description

Default

Value

Description

Pulse Report Codes (cont.)

290
291
292
293
294
295
296

Zone 19 Alarm
Zone 20 Alarm
Zone 21 Alarm
Zone 22 Alarm
Zone 23 Alarm
Zone 24 Alarm
Zone 25 Alarm

64h
65h
66h
67h
68h
69h
6Ah

297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321

Zone 1 Trouble
Zone 2 Trouble
Zone 3 Trouble
Zone 4 Trouble
Zone 5 Trouble
Zone 6 Trouble
Zone 7 Trouble
Zone 8 Trouble
Zone 9 Trouble
Zone 10 Trouble
Zone 11 Trouble
Zone 12 Trouble
Zone 13 Trouble
Zone 14 Trouble
Zone 15 Trouble
Zone 16 Trouble
Zone 17 Trouble
Zone 18 Trouble
Zone 19 Trouble
Zone 20 Trouble
Zone 21 Trouble
Zone 22 Trouble
Zone 23 Trouble
Zone 24 Trouble
Zone 25 Trouble

F3h
F3h
F3h
F3h
F3h
F3h
F3h
F3h
F3h
F3h
F3h
F3h
F3h
F3h
F3h
F6h
F6h
F6h
F6h
F6h
F6h
F6h
F6h
F6h
F6h

322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338

Zone 1 Restoral
Zone 2 Restoral
Zone 3 Restoral
Zone 4 Restoral
Zone 5 Restoral
Zone 6 Restoral
Zone 7 Restoral
Zone 8 Restoral
Zone 9 Restoral
Zone 10 Restoral
Zone 11 Restoral
Zone 12 Restoral
Zone 13 Restoral
Zone 14 Restoral
Zone 15 Restoral
Zone 16 Restoral
Zone 17 Restoral

E3h
E3h
E3h
E3h
E3h
E3h
E3h
E3h
E3h
E3h
E3h
E3h
E3h
E3h
E3h
E6h
E6h

Sentrol 1-800-547-2556

00H - FFH

00H - Not Reported

00H - FFH

00H - Not Reported

00H - FFH

00H - Not Reported

The Following Locations Are Only Accessible With a Keypad
Loc

Description

Default

339
340
341
342
343
344
345
346

Zone 18 Restoral
Zone 19 Restoral
Zone 20 Restoral
Zone 21 Restoral
Zone 22 Restoral
Zone 23 Restoral
Zone 24 Restoral
Zone 25 Restoral

E6h
E6h
E6h
E6h
E6h
E6h
E6h
E6h

347
348

Ground Fault
Ground Fault Restoral

349
350

Value

Description

00H - FFH

00H - Not Reported

00h
00h

00H - FFH

00H - Not Reported

AC Fail
AC Fail Restoral

FAh
EAh

00H - FFH

00H - Not Reported

351
352

Low Battery
Low Battery Restoral

F9h
E9h

00H - FFH

00H - Not Reported

353
354

Hibernation
Hibernation Restoral

00h
00h

00H - FFH

00H - Not Reported

355
356

BMB Memory Fail
BMB Memory Fail Restoral

00h
00h

00H - FFH

00H - Not Reported

357
358

DAC Memory Fail
DAC Memory Restoral

00h
00h

00H - FFH

00H - Not Reported

359

Keypad Lockout

00h

00H - FFH

00H - Not Reported

360
361

Keypad Missing
Keypad Missing Restoral

00h
00h

00H - FFH

00H - Not Reported

362
363

DAC Missing
DAC Missing Restoral

00h
00h

00H - FFH

00H - Not Reported

364
365

Expander Missing
Expander Missing Restoral

00h
00h

00H - FFH

00H - Not Reported

366
367

RA Missing
RA Missing

00h
00h

00H - FFH

00H - Not Reported

368
369

LEM/LRM Trouble
LEM/LRM Trouble Restoral

00h
00h

00H - FFH

00H - Not Reported

370
371

Bell Trouble
Bell Trouble Restoral

00h
00h

00H - FFH

00H - Not Reported

372
373

Telco Trouble
Telco Trouble Restoral

00h
00h

00H - FFH

00H - Not Reported

374
375

Communications Trouble
Communications Trouble Restoral

00h
00h

00H - FFH

00H - Not Reported

Sentrol 1-800-547-2556

The Following Locations Are Only Accessible With a Keypad

Loc

Description

Default

376
377

Comm Test Trouble
Comm Test Trouble Restoral

00h
00h

378

System Startup

00h

379
380

Local Program Begin
Local Program End

00h
00h

381

Event Log Reset

00h

382
383

RPM Begin
RPM End

384
385

Value

Description

00H - FFH

00H - Not Reported

00H - FFH

00H - Not Reported

00H - FFH

00H - Not Reported

00H - FFH

00H - Not Reported

00h
00h

00H - FFH

00H - Not Reported

RPM Denied
RPM Aborted

00h
00h

00H - FFH

00H - Not Reported

386
387

Auto Comm Test Normal
Auto Comm Test Abnormal

00h
00h

00H - FFH

00H - Not Reported

388

Manual Comm Test

10h

00H - FFH

00H - Not Reported

Sentrol 1-800-547-2556

5.6.1 DAC PROGRAMMING MATRIX
Programming Locations

Programmed Value

Loc

Description

Default

Value

Enable RPM

0
1

Disabled
Enabled

Auto Answer Rings

0
15

Number of Rings Before Answer

Second Call Bypass Time (Sec)

0
255

The amount of time for the answering machine bypass time window. This allows the
remote programmer to bypass an answering machine by making two calls to the premises. The first call must ring three times or
less and not be answered. The answering
machine bypass time window starts ten seconds after the last ring of the first call. If the
first ring of the second call occurs within the
answering machine bypass time window, the
panel answers the second call on the first ring.
Remote Programming must be enabled.

Disable Call Waiting

0
1

Seconds Between Attempts

Telco Lines to be Monitored

0
255
0
1
2
3

Telco L1 On Hook Time (Sec)

1
15

Telco L2 On Hook Time (Sec)

1
15

Telco L1 Off Hook Time (Sec)

1
15

Telco L2 Off Hook Time (Sec)

1
15

Telco Line 1 Dialer Type

0
1
2

US Pulse
Touchtone
Foreign Pulse

Telco Line 2 Dialer Type

0
1
2

US Pulse
Touchtone
Foreign Pulse

Telco N1 Dial Attempt

1
10

Maximum Dial Attempts on
Phone Number 1

Telco N2 Dial Attempt

1
10

Maximum Dial Attempts on
Phone Number 2

Telco N3 Dial Attempt

1
10

Maximum Dial Attempts on
Phone Number 3

Telco N1 Reporting Format

0
1
2
3
4
5

Pulsed 20 baud, non-extended
Pulsed 20 baud, extended
Pulsed 40 baud, extended
SIA
Contact ID
Pager

Sentrol 1-800-547-2556

Description

Not Disabled
Disabled
Time in Seconds Between Call Attempts
When Reporting
None
Line 1
Line 2
Both Lines

Programming Locations

Programmed Value

Loc

Description

Default

Value

Telco N2 Reporting Format

0
1
2
3
4
5

Pulsed 20 baud, non-extended
Pulsed 20 baud, extended
Pulsed 40 baud, extended
SIA
Contact ID
Pager

Telco N3 Reporting Format

0
1
2
3
4
5

Pulsed 20 baud, non-extended
Pulsed 20 baud, extended
Pulsed 40 baud, extended
SIA
Contact ID
Pager

19-50

Telephone Number 1

all F's

0-F

51-82

Telephone Number 2

all F's

0-F

83-114

Telephone Number 3

all F's

0-F

115-146

RPM Number

all F's

0-F

Description

DAC 1500 Mode FM
147

Current Time - Hour

0
24

Set DAC Clock

148

Current Time - Minute

0
59

Set DAC Clock

149

Comm Test Time - Hour

0
24

Set Time for Auto Comm Test

150

Comm Test Time - Minute

0
59

Set Time for Auto Comm Test

151-154

Account Code 1

0
F

155-158

Account Code 2

0
F

159-166

Pulse Report Codes

0
FF
00
E0
F6
E6
F7
E7
08
FA

Sentrol 1-800-547-2556

Zone Alarm
Zone Restore
System Trouble
System Trouble Res.
Tel. Line Trouble
Tel. Line Trouble Res.
Auto Comm Test
Abnormal Comm Test

5.7.1 ZRM OVERRIDE

5.7 FUNCTION MAP DESCRIPTION
Zone Definition - This defines what type of devices are
connected to a zone and how the zone will respond when
one or more of the devices signals an alarm condition.
Zone Bell Association - This associates a NAC or group of
NACs to be activated when the specified zone is in alarm.
Notification Appliance Circuit Definition - Defines the
cadence a NAC will use when activated. Setting the
cadence to Not Used will also deactivate supervision of
the NAC.
Battery Saver Mode - If set to On, the batteries will be
put into parallel mode to conserve power. This only
happens when AC has failed and no NACs are active.
AC Cycles - Specifies the frequency of the supplied AC
power to be used for time-keeping.
Zone Expander Module Definition - Specifies if a zone
expander is installed.
Communicator Type - Specifies the type of communicator installed.

Normally, the relays on a ZRM are configured as alarm
followers for the corresponding zones on the ZEM that the
ZRM is installed. Programming zones to override a ZRM’s
relays allows the installer to program the BMB to have a
more sophisticated relay control rather than wiring
numerous relays in parallel or serial. If no zones are
programmed to override a particular ZRM relay, that relay
will act as a zone follower for its associated zone. The
BMB can trip multiple relays based on one zone input
(relays 1, 6, 22 can activate when zone 1 goes into alarm
by setting location 122 to 1, location 123 to 2, and
location 127 to 2). The BMB can also have multiple zones
trip the same relay (zones 3, 12, 25 can activate relay 3
when any of the three go into alarm by setting location
134 to 4, location 188 to 4, and location 266 to 4). The
BMB can also be programmed for a combination of both
(zones 1, 2, 3 can activate relay 1, 3 and zones 4, 5, 6 can
activate relay 6, 7 by setting location 122 to 5, location
128 to 5, location 134 to 5, location 140 to 6, location 146
to 6, and location 152 to 6). One use for this ability is to
have all fire zones activate relay 1 and all supervisory
zones activate relay 6. All fire zones would have their
associated ZRM override for ZRM 1 set to the value 1. All
supervisory zones would have their associated ZRM
override for ZRM 2 set to the value 2.
ZEM 1

ZEM 2

ZEM 3

ZRM 1

ZRM 2

ZRM 3

Zones 2-5
Relays 1-4

Zones 6-9
Relays 5-8

Zones 10-13
Relays 9-12

ZEM 4

ZEM 5

ZEM 6

ZRM 4

ZRM 5

ZRM 6

Zones 14-17
Relays 13-16

Zones 18-21
Relays 17-20

Zones 22-25
Relays 21-24

Sentrol 1-800-547-2556

6.0
INITIAL ACCEPTANCE TESTING
Following the installation of all of the system components
and the programming of the FACP, a complete, 100%
acceptance test must be performed and the results
documented. A permanent record of the initial acceptance tests must be made and retained with the system
documentation. Refer to Chapter 7 of NFPA 72-1996, the
National Fire Alarm Code.
Upon the completion of the Initial Acceptance Test,
restore all circuits and system components to their
design condition. Install the 2501 FACP Operating
Instructions, Appendix C, in an easily accessible and
readable location adjacent to the FACP. Advise the
owner/operator of the site and the monitoring firm that
the system is now “on-line”.

If an alarm condition occurs and the sounder is on, either
the SYSTEM RESET or the ALARM SILENCE push-button
may be pressed. If the SYSTEM RESET push-button is
pressed first, the local sounder will deactivate, the bells
will silence and the system LEDs will extinguish. All zones
in alarm will be reset. If the ALARM SILENCE pushbutton is pressed first, the proper system and zone LEDs
and the trouble sounder will become active. If the
SYSTEM RESET push-button is pressed after the alarm is
silenced, the zone(s) that went into alarm will be reset.
NOTE: The 2501 (FACP) uses three (3) different types
of tones to distinguish between an alarm, a trouble, and
a supervisory trouble. The output tones for the Sounder
will be as follows:
•
•
•

Alarm tone will have a steady tone
Trouble tone will have a pulsing tone
Supervisory tone will have a rapid pulsing tone

A. PROGRAM ZONE 1 AS NORMAL FIRE, “0”, WITH
A CLASS “B” TYPE CONFIGURATION:

6.1 ALARM ZONE TESTING

TEST 1 - ZONE 1 SHORTED

SETUP
1.
2.

5.
6.

Connect the control to a primary power source (110
to 120 VAC).
Connect the Zone One (Alarm initiating) input to
Normally Open switches or Sensors. This connection
must be in parallel to the 2.7k Ohm 5% end-of-line
(EOL) resistor (provided). (Trouble with the circuit
may occur if the resistor is connected in series).
Connect the EOL, 2.7k Ohm 5% resistor (provided),
to each of the Bell circuits. A Trouble Indication will
occur if the EOL is not connected.
Connect (observe polarity) an audible device into
BELL 1 & BELL 2 terminals. This connection is in
parallel to the EOL .
Connect the 4-wire bus connector between the BMB
and each ZEM that is to be coupled into the system.
Each ZEM must have an EOL, 2.7k Ohm 5% resistor
(provided), for each zone connected in order to
prevent a trouble condition.
Connect the batteries, minimum of two 12 Volt 7 Ah
sealed lead acid batteries. Failure to connect a
battery will result in a trouble condition.

Place a short across Zone 1 on the BMB by placing a
short across the EOL at the terminals.
•
The system will go into alarm
•
The polarity of the voltage at BELL 1 and BELL 2
will reverse and pulse a Temporal 3 cadence
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Sounder will sound an alarm tone

Press the ALARM SILENCE button
•
The output at BELL 1 and BELL 2 will stop
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit
•
The Sounder will change to a trouble tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit

Remove the short across Zone 1 terminal
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is off

Press the SYSTEM RESET button
•
All LEDs are off

TESTING AND SYSTEM RESPONSE
Visually observe the LEDs located on the Basic Master
Board (BMB) to verify that no troubles, alarms, or
supervisory conditions exist. If a condition is detected,
check the zone LEDs to identify if the problem is zone or
system related. Correct the problem and then press the
SYSTEM RESET button to reset the panel and clear the
condition.

Sentrol 1-800-547-2556

TEST 2 - ZONE 1 OPEN

Create an open circuit on Zone 1 on the BMB by
disconnecting one side of the EOL at the terminals.
•
The system will go into trouble
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit
•
The Sounder will sound a trouble tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit

Replace the EOL connection to Zone 1’s terminal
•
The Trouble LED is off
•
The Zone 1 Trouble LED is off

ZONE 1 PROGRAMMED WATERFLOW, “1”.

PROGRAM ZONE 1 AS A FIRE SUPERVISORY, “2”.

TEST 1 - ZONE 1 SHORTED

Create a short on Zone 1 on the BMB by placing a
short across the EOL at the terminals.
•
The system will go into Fire Supervisory
•
The Sounder will sound a supervisory tone
•
The Fire Supervisory LED is lit
•
The Zone 1 Alarm LED is lit

Press the ALARM SILENCE button
•
The Fire Supervisory LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit
•
The Sounder will change to a trouble tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off
•
The Fire Supervisory LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit

Remove the short across Zone 1 terminal
•
All LEDs are off

Create a short on Zone 1 on the BMB by placing a
short across the EOL at the terminals.
•
The system will go into alarm
•
The polarity of the voltage at BELL 1 and BELL 2
will reverse and pulse a Temporal 3 cadence
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Sounder will sound an alarm tone
Press the ALARM SILENCE button
•
The output at BELL 1 and BELL 2 will stop
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit
•
The Sounder will change to a trouble tone
Press the TROUBLE SILENCE button
•
The Sounder will turn off
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit
Remove the short across Zone 1 terminal
•
All LEDs are off

TEST 2 - ZONE 1 OPEN
1.

Violate Zone 1 on the BMB by disconnecting one side
of the EOL at the terminals.
•
The system will go into trouble
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit
•
The Sounder will sound a trouble tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit

Sentrol 1-800-547-2556

Replace the EOL connection to Zone 1’s terminal
•
The Trouble LED is off
•
The Zone 1 Trouble LED is off

PROGRAM ZONE 1 AS ALARM VERIFICATION, “4”

TEST 1 - ZONE 1 SHORTED
1.

Create a short on Zone 1 on the BMB by placing a
short across the EOL at the terminals.
•
The system will go into alarm within 5 seconds
•
The polarity of the voltage at BELL 1 and BELL 2
will reverse and pulse a Temporal 3 cadence
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Sounder will sound an alarm tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit

Remove the short across Zone 1 terminal
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is off

Press the SYSTEM RESET button
•
All LEDs are off

D. PROGRAM ZONE 1 AS NON-LATCHING, “3”

TEST 1 - ZONE 1 SHORTED
1.

Press the TROUBLE SILENCE button
•
The Sounder will turn off
•
The Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit

Remove the short across Zone 1 terminal
•
All LEDs are off

TEST 2 - ZONE 1 OPEN
TEST 2 - ZONE 1 OPEN
1.
1.

Press the TROUBLE SILENCE button
•
The Sounder will turn off
•
The Trouble LED is lit
•
The Zone 1 Trouble LED is lit

Replace the EOL connection to Zone 1’s terminal
•
The Trouble LED is off
•
The Zone 1 Trouble LED is off

NOTE: Repeat tests A through D for zones 2 through
25 and verify system response.

Sentrol 1-800-547-2556

Set BELL 1 through BELL 4 to NON-SILENCEABLE
STEADY.
• Connect an audible device or digital multimeter
to the outputs for verification.
• Violate Zone 1 by shorting the EOL at the
terminals and verify the Steady output.
• Press Alarm Silence and verify that the bells do
not silence.
• Remove the short and press SYSTEM Reset.

Set Bell 1 through Bell 4 to Latching Non-Silenceable
Steady and Zone 1 to Non-Latching.
• Connect an audible device or digital multimeter
to the outputs for verification.
• Violate Zone 1 by shorting the EOL at the
terminals and verify the Steady output.
• Press ALARM SILENCE and verify that the bells
do not silence.
• Remove the short and verify that the bells
remain active.
• Press SYSTEM RESET.

6.2 NOTIFICATION APPLIANCE CIRCUIT TESTING
There are two (2) Notification Appliance Circuits (NACs)
for audible and visible notification appliances integral on
the BMB. Consistent with the new requirements of the
National Fire Alarm Code - 1996 the default setting for
the BELL 1 / BELL 2 circuit is the Temporal 3 Code 3
(ANSI S3.41, Standard Emergency Evacuation Signal).
The BELL 3 / BELL 4 circuit default setting is “not used”.
If visible notification appliances are needed for ADA
compliance they can be connected to this circuit once it
has been reprogrammed for either steady or nonsilencable operation. Other signal options are available, as
required by 3-7.1(b) of NFPA 72-1996, for when the
planned action in response to a fire emergency is not
evacuation but relocation, or where the Authority Having
Jurisdiction requires some other signal.

BELL CADENCE TESTING
1.

BELL 1 and BELL 2 activate when an alarm occurs
during testing.
• Connect an audible device or digital multimeter
to the outputs for verification.
• Violate Zone 1 by shorting the EOL at the
terminals and verify the Temporal 3 output.
• Remove the short and press SYSTEM RESET.
Set BELL 3 and BELL 4 to activate using the Temporal 3 code.
• Connect an audible device or digital multimeter
to the outputs for verification.
• Violate Zone 1 by shorting the EOL at the
terminals and verify the Temporal 3 output.
• Remove the short and press SYSTEM RESET.
Set BELL 1 through BELL 4 to activate using the
Standard Marchtime Code.
• Connect an audible device or digital multimeter
to the outputs for verification.
• Violate Zone 1 by shorting the EOL at the
terminals and verify the Standard March Time
Code output.
• Remove the short and press SYSTEM RESET.
Set BELL 1 through BELL 4 to activate using the
California Marchtime Code (10 sec ON, 5 sec OFF).
• Connect an audible device or digital multimeter
to the outputs for verification.
• Violate Zone 1 by shorting the EOL at the
terminals and verify the California March Time
Code output.
• Remove the short and press SYSTEM RESET.
Set BELL 1 through BELL 4 to STEADY.
• Connect an audible device or digital multimeter
to the outputs for verification.
• Violate Zone 1 by shorting the EOL at the
terminals and verify the Steady output.
• Remove the short and press SYSTEM RESET.

NOTE: Set BELL 1 through 4 to the appropriate
cadence before performing Bell Line Testing.

BELL LINE TESTING
TEST 1 - BELL 1 OUTPUT SHORTED
1.

Create a short circuit on BELL 1 on the BMB by
placing a short across the EOL at the terminals.
• The BELL 1 Trouble LED is lit
• The System Trouble LED is lit
• The Sounder will sound a trouble tone

Press the TROUBLE SILENCE button
• The Sounder will turn off
• The BELL 1 Trouble LED is lit
• The System Trouble LED is lit

Remove the short from Zone 1’s terminals
• The BELL 1 Trouble LED is off
• The System Trouble LED is off

TEST 2 - BELL 1 OUTPUT OPEN
1.

Create an open circuit on BELL 1 on the BMB by
disconnecting one side of the EOL at the terminals.
• The BELL 1 Trouble LED is lit
• The System Trouble LED is lit
• The Sounder will sound a trouble tone

Press the TROUBLE SILENCE button
• The Sounder will turn off
• The BELL 1 Trouble LED is lit
• The System Trouble LED is lit

Reconnect the EOL to Zone 1’s terminals
• The BELL 1 Trouble LED is off
• The System Trouble LED is off

NOTE: Repeat Tests 1 and 2 for all four BELL outputs
and verify system response

Sentrol 1-800-547-2556

6.3 GROUND FAULT TEST

TEST 1 - PROGRAM ZONE 1 AS NORMAL (“0”)

Connect a 1 meter long, 18 gauge wire between a
terminal and the earth ground point
• The GRD FAULT LED on the BMB is lit
• The System Trouble LED is lit
• The Sounder will sound a trouble tone
Press the TROUBLE SILENCE button
• The Sounder will turn off
• The GRD FAULT LED on the BMB is lit
• The System Trouble LED is lit

Place Zone 1 function jumper in silent walk test mode.
•
The system will go into trouble
•
The Zone 1 Trouble LED is lit
•
The System Trouble LED is lit
•
The Sounder will sound a trouble tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off

Violate Zone 1 on the BMB by placing a short across
the EOL at the terminals.
•
The System Alarm LED is lit for 5 seconds
•
The Zone 1 Alarm LED is lit for 5 seconds

Remove the short across Zone 1 terminal

The system will automatically reset to allow for the
next device or zone to be tested

Remove the ground wire from the terminal
• The GRD FAULT LED on the BMB is off
• The System Trouble LED is off

NOTE: Repeat above test for all terminals except common
alarm and common trouble (unless they are connected to
supervised lines) and verify system response.

SILENT WALK TEST MODE TESTING

NOTE: Repeat above test for Alarm Verification (“4”).

6.4 SYSTEM TESTING USING TEST
MODES

TEST 2 - PROGRAM ZONE 1 AS NON-LATCHING (“3”)
1.

Place Zone 1 function jumper in silent walk test mode.
•
The system will go into trouble
•
The Zone Trouble LED is lit
•
The System Trouble LED is lit
•
The Sounder will sound a trouble tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off

Violate Zone 1 on the BMB by placing a short across
the EOL at the terminals.
•
The System Alarm LED is lit
•
The Zone 1 Alarm LED is lit
•
The Zone 1 Trouble LED is lit
•
The System Trouble LED is lit

Remove the short across Zone 1 terminal
•
The System Alarm LED is off
•
The Zone 1 Alarm LED is off
•
The Zone Trouble LED is lit
•
The System Trouble LED is lit

Press the SYSTEM RESET button
•
All LEDs are off

A. WALK TEST MODE TESTING
PROGRAM ZONE 1 AS NORMAL (“0”)
1.

Place Zone 1 function jumper in walk test mode.
•
The system will go into trouble
•
The Zone 1 Trouble LED is lit
•
The System Trouble LED is lit
•
The Sounder will sound a trouble tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off

Violate Zone 1 on the BMB by placing a short across
the EOL at the terminals.
•
The Alarm LED will light for 5 seconds
•
The Zone 1 Alarm LED will light for 5 seconds
•
The polarity of the voltage at BELL 1 and BELL 2 will
reverse and pulse a Temporal 3 cadence for 2
seconds

The system will automatically reset to allow for the
next device or zone to be tested.

NOTE: Repeat above test for Waterflow (“1”), Fire
Supervisory (“2”), Non-Latching (“3”), and Alarm
Verification (“4”). Under Supervisory, the bells do not
ring. However, the sounder will sound for 5 seconds and
shut off with the LEDs.

NOTE: Repeat above test for Waterflow (“1”) and Fire
Supervisory (“2”). Please note that under Supervisory,
the Supervisory Alarm LED is lit instead of the System
Alarm LED.

Sentrol 1-800-547-2556

DISCONNECT MODE TESTING

6.5 REMOTE KEYPAD CHECK-OUT
TEST 1 - PROGRAM ZONE 1 AS NORMAL (“0”)
1.

Place Zone 1 function jumper in disconnect test mode.
•
The system will go into trouble
•
The Trouble LED is lit
•
The System Trouble LED is lit
•
The Sounder will sound a trouble tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off

Violate Zone 1 on the BMB by placing a short across
the EOL at the terminals.
•
The Zone 1 Alarm LED is lit
•
The Zone 1 Trouble LED is lit
•
The System Trouble LED is lit

Remove the short across Zone 1 terminal
•
The Zone 1 Alarm LED is lit
•
The Zone 1 Trouble LED is lit
•
The System Trouble LED is lit

Press the SYSTEM RESET button
•
All LEDs are off

Verify that the Keypad has been properly installed and
connected to the 2501 FACP. Verify that the Keypad
password is properly programmed. Activate initiating
devices and verify that the proper designations are
displayed at the Keypad. Try silencing alarm signals
without the password and with an incorrect password and
verify that alarm signals continue. Repeat with the
correct password and verify that the signals silence. Use
each operator function from the Keypad and verify that
all functions operate.
To perform a lamp test of the keypad, access Lamp Test
from the Main Menu. During lamp test, all dots on the
display and all lightable keys will turn on as well as the
keypad’s sounder for 5 seconds. See the keypad manual
for specific instructions on how to access the Lamp Test.

6.6 BMB LAMP TEST

NOTE: Repeat above test for Alarm Verification (“4”).

TEST 2 - PROGRAM ZONE 1 AS WATERFLOW (“1”)
1.

Place Zone 1 function jumper in disconnect test mode.
•
The system will go into trouble
•
The Trouble LED is lit
•
The System Trouble LED is lit
•
The Sounder will sound a trouble tone

Press the TROUBLE SILENCE button
•
The Sounder will turn off

Violate Zone 1 on the BMB by placing a short across
the EOL at the terminals.
•
The Zone 1 Alarm LED is lit
•
The Zone 1 Trouble LED is lit
•
The System Trouble LED is lit

Remove the short across Zone 1 terminal
•
The Zone 1 Alarm LED is off
•
The Trouble LED is lit
•
The System Trouble LED is lit

Press the SYSTEM RESET button
•
All LEDs are off

To test the lamps on the BMB, the ZEM’s and any other
peripherals located in the can, the system must not have
an alarm or trouble condition. Press and hold both the
ALARM SILENCE and TROUBLE SILENCE keys. All the
LEDs will illuminate as long as both keys are pressed and
an alarm or trouble does not occur.

6.7 DIGITAL ALARM COMMUNICATOR
CHECK-OUT
Verify that the DAC has been properly installed and
connected to the 2501 FACP. Connect the proper
telephone lines to the DAC. Verify that the DAC is
programmed correctly. Initiate a manual comm test by
pressing the Comm Test push-button located on the DAC.
Verify that a manual Comm Test report was received.
Additional testing can be performed as required. To
perform a lamp test, see Section 6.6 Lamp Test.

6.8 LEM/LRM CHECK-OUT

NOTE: Repeat above test for Fire Supervisory (“2”) and
Non-Latching (3).

Verify that the LEM/LRM has been properly installed and
connected to the 2501 FACP. Connect the signaling lines
to the proper device type. Verify that the FACP is programmed correctly. Initiate the proper alarm (Fire or
Supervisory). Verify that the signal is received by the
connected device. To perform a lamp test, push the “push
to test” push-button on the LEM/LRM module. The LED
should remain activated until the push-button is released.

Sentrol 1-800-547-2556

7.0
INSPECTION AND TESTING
No piece of equipment can be expected to operate reliably
without regular maintenance. The ESL 2501 Fire Alarm
Control Panel is designed to provide years of reliable performance. Nevertheless, like all other building systems it must be
maintained properly. The appropriate inspection and testing
requirements differ depending upon whether the 2501 FACP is
being used for household fire warning or in a commercial,
architectural, institutional or non-household residential
application. Household fire warning systems are inspected and
tested in accordance with NFPA 72-1996, Chapter 2 (see
Section 10). All other systems are inspected and tested in
accordance with NFPA 72-1996, Chapter 7.
Inspect and test the fire alarm system in accordance with the
inspection and test procedures and schedules established by
the local AHJ or presented in Chapter 7 NFPA 72-1996. Prior
to commencing the inspection and test of a fire alarm system
make certain that:
•
•
•

The owner/operator has advised the facility occupants and
that a fire watch has been established
The public fire service has been notified
The off-premises supervising station fire alarm system
operator has been advised and that an alternate means for
reporting a fire has been established

NOTE: When replacing batteries, always replace both
batteries - even if only one appears dead. The typical battery
life is 3 to 5 years, depending on usage. See manufacturer’s
specifications for particular battery used.

8.0
PRECAUTIONS AND WARNINGS
The equipment described in this manual is Listed by Underwriters Laboratories, Inc., for use in fire alarm signaling
systems, only when installed in accordance with this manual
and the National Fire Protection Association’s National Fire
Alarm Code (NFPA 72); the National Electrical Code (NFPA
70); the Life Safety Code (NFPA 101); and the local Authority
Having Jurisdiction (AHJ). The installer must be familiar with
and understand all applicable codes before beginning installation.
To ensure proper operation of this equipment:
• DO NOT deviate from any installation instructions
contained in this manual.
• DO NOT assume any installation details not shown in
this manual.
• DO NOT alter any mechanical or electrical features of
the equipment supplied.
• BE FAMILIAR with the building code, fire prevention
code, and/or other Authority Having Jurisdiction (AHJ)
in the locale of the installation.

Document all inspection and testing. Some fire alarm system
components do not have to be tested at each scheduled
inspection. Keep track of which devices are tested to ensure
that different devices are tested at the subsequent inspection.

IT IS THE RESPONSIBILITY OF THE INSTALLER TO
ENSURE THAT THE WIRING AND DEVICES INSTALLED
IN THE SYSTEM MEET CURRENT NATIONAL ELECTRICAL CODE, NFPA STANDARDS, STATE AND LOCAL
BUILDING CODE REQUIREMENTS.

Subsequent to the completion of the inspection and testing of
the system make certain that the occupant, public fire service
and supervising station fire alarm system operator are advised
that the system has been placed back “on-line” and to treat all
subsequent alarms as indications of a fire in progress.

WARNING: Under abnormal conditions, AC line voltages may
be present on any terminal. Touching any component could
be hazardous and result in loss of life. A short circuit can result
in arcing that could cause the ejection of molten metal, causing
injuries to testing personnel.

7.1 MAINTENANCE
The 2501 (FACP) is relatively maintenance free, other than
performing regular testing to make sure all the systems are
operating properly. Batteries require special attention.

To minimize this possibility, only qualified technicians familiar
with electrical hazards should perform these procedures.
Safety glasses should be worn by such personnel, and instruments used for voltage measurement should be designed for the
purpose and should be in good mechanical and working order.
If any application or installation information is not understood,
or is not covered herein, please contact Sentrol Technical
Services at 1-800-800-2027.

7.1.1 BATTERIES
The 2501 (FACP) uses two sealed lead-acid batteries as the
secondary power source. The batteries must be replaced if the
Low Battery LED remains on for more than 48 hours (meaning
one or more of the battery cells are dead or the batteries will
not hold a charge). If the batteries are dead, they must be
replaced with batteries of the same voltage and capacity rating,
with a maximum of 12 V, 17.2 Ah. Assure that any battery
used allows a minimum clearance of 1/4" from its terminals to
any non-power-limited circuit, including the system cabinet.

9.0
TROUBLESHOOTING
This section provides a quick reference troubleshooting guide
for the 2501 (FACP). This guide will aide in diagnosing and
locating most system faults quickly and efficiently. If you
cannot resolve the fault with the assistance of this guide, call
Sentrol Technical Services at 1-800-800-2027.

Sentrol 1-800-547-2556

Troubleshooting Guide
Trouble Indicators

Possible Cause

Corrective Action

End-of-line resistor value incorrect or missing

Meter circuit to verify proper resistance

Loss of power to power supervision relay

Meter voltage on circuit

Polarity reversal relay wired incorrectly

Check circuit diagram to confirm wiring

Loose connection or broken wire

Check for opens in circuit

Disconnect/Walktest function jumper not in normal position

Put Disconnect/Walktest function jumper in normal position

Faulty water flow switch

Repair or replace water flow switch

Initiating device missing from circuit

Check for any devices that may have been removed from
the initiating circuit

“Class B” wires connected to wrong terminals

Make sure wires are connected to “Class B” terminals

Incompatible two wire detector

Check UL compatibility listing to verify the detector is listed
for use with the panel it is connected to

Overcurrent or lightning damage

Check for burn marks or other signs of overcurrent damage.
Return to factory for service. Replace board if traces are damaged.

Supervisory trouble LED
Rapid trouble beep
Zone alarm LED

Zone supervisory device tripped

Check initiating device on zone

System trouble LED
Zone trouble LED
Rapid trouble beep

Open in zone circuit

Check zone for broken wires or opens in circuit

Disconnect/Walktest function jumper not in normal position

Put Disconnect/Walktest function jumper in normal position

Loss of AC (line voltage)

If line voltage is too low, upgrade or move to new circuit

Low AC power
Less than 94 VAC input to power supply - no load
Less than 102 VAC with maximum load

Check for loose or broken connections
If power supply has no output, replace unit
Return to factory for service

Battery low
Less than 24 VDC

Replace batteries

Battery missing or less than 20 VDC

Replace batteries

Open in battery harness

If there is an open or break in the battery harness, repair it or
replace it

Ground on any circuit, other than supplementary alarm or
trouble contacts

Remove one wire at a time until ground fault LED and system
trouble LED goes out. Repair circuit causing fault condition.

End-of-line resistor value incorrect or missing

Meter circuit to verify proper resistance

Polarity reversed in circuit

Check circuit diagram to confirm wiring and polarity

Loose connection or broken wire

Check for opens in circuit

Indicating device missing from circuit

Check for any devices that may have been removed from
the indicating circuit

Style “Z” wires crossed in circuit

Make sure polarity is observed completely through circuit

Style “Y” wires connected to wrong terminals

Make sure wires are connected to Style “Y” terminals

Overcurrent or lightning damage

Check for burn marks or other signs of overcurrent damage.
Return to factory for service.
Replace board if traces are damaged.

Bad ZEM connection

Check data bus connections

ZEM malfunction

Check for signs of damage to the BMB or ZEM.

BMB malfunction

Return to factory for service or replace boards.

Zone 1 - 25 trouble LED
System trouble LED
Trouble sounder slow
intermittent

Low/No AC power
System trouble LED
Trouble sounder slow
intermittent
Low/No battery LED
System trouble LED
Trouble sounder slow
intermittent

Ground fault LED
System trouble LED
Trouble sounder slow
intermittent

Indicating trouble LED
System trouble LED

System trouble LED
Trouble sounder slow
intermittent (with no
other indicators)

Figure 9.0 Troubleshooting Guide

Sentrol 1-800-547-2556

10.0
HOUSEHOLD FIRE WARNING
SYSTEMS
A properly designed household fire warning system,
implemented with the ESL 2501 Fire Alarm Control
Panel, is intended to provide enhanced life-safety for the
occupants in the event of a fire. It is intended to provide
a warning sufficiently early in the development of a fire to
enable the occupants to escape before conditions become
life-threatening. Once the warning has been provided the
occupants must still escape. Consequently, in order to
derive the intended benefit from the household fire
warning system, the household must have a pre-arranged
fire escape plan. A fire escape plan includes at least two
escape routes from all sleeping areas as well as a preplanned meeting place outside the building. The intent of
this system is not to preserve property but to facilitate
timely escape of the occupants.
Since it takes precious time for smoke to travel from a fire
to a smoke detector, the highest level of life safety is
attained when a smoke detector is installed in each room.
If fewer detectors are used the smoke must travel further
before encountering a smoke detector. A fire warning
system with fewer detectors responds more slowly,
allowing the fire to grow larger before the occupants are
warned of its existence. This translates to substantially
lower levels of life-safety.

10.1 INSTALLATION
This system should be installed in accordance with
Chapter 2 of the National Fire Alarm Code 72-1996. A
copy of this Standard may be purchased from the
National Fire Protection Association, Batterymarch Park,
Quincy, MA 02269

10.2 DETECTOR LOCATION
The minimum level of protection requires one smoke
detector between each bedroom area and the rest of the
house and on each additional story, including the basement but excluding any crawl spaces and unfinished
attics. In new construction, a smoke detector also shall
be installed in each sleeping room. Detectors should be
located at the top of each stairway leading to an occupied area.
In addition, it is recommended that heat or smoke
detection be located in the following areas if they are
separated by a door from the areas protected by the
required smoke detectors: living room, dining room,
attic, utility room, basement, furnace room, garage, and
hallways.

10.3 NOTIFICATION APPLIANCE
LOCATION
If smoke detectors have been used that do not contain an
integral signaling device with a minimum output of 85
dBA at 10 feet, a separate notification appliance must be
installed adjacent to each sleeping area. In new construction, where a smoke detector is also required in each
sleeping room, all detectors must be arranged so that the
signaling devices in all detectors operate whenever any
single smoke detector unit is activated.
In addition, it is recommended that additional signaling
devices be installed on each level and on the outside of
the premises. Check local codes before installing an
outside device to assure they are permitted or if a timed
cutoff is required.

10.4 ESCAPE PLAN
1.

Have at least two (2) possible escape routes from
each room of the house.

Before opening any door check for heat or smoke.
NEVER OPEN A DOOR THAT IS HOT TO THE
TOUCH.

If there is no alternative escape path available and
there is smoke in you escape path, crawl with your
head as close to the floor as possible. You can use a
wet cloth over your mouth and nose to reduce the
amount of smoke you inhale as you escape.

Have a prearranged meeting place outside the house.

Call the FIRE DEPARTMENT from outside the house
as soon as possible.

NEVER re-enter a burning building.

Practice your escape plan and meeting place with
ALL family members.

10.5 HOUSEHOLD FIRE WARNING
SYSTEM MAINTENANCE
All automatic systems need regular maintenance in order
to provide continued performance and the Household Fire
Warning System needs regular maintenance as well. The
head of the household should test the fire warning system
at least monthly to verify that it is in working order. If
the system is monitored by an off-premises monitoring
firm, it is important to call the monitoring company
before the test of the system to ensure that the test is not
misconstrued to be a fire alarm. It is also necessary to
call the monitoring firm after the test to ensure that
alarms are not misconstrued to be tests. Any deviation
from “normal working” noticed by the building occupants
should be quickly corrected by a qualified, professional

Sentrol 1-800-547-2556

fire alarm system service contractor. In addition to the
tests by the head of the household, the owner should
arrange for a complete inspection and test of the entire
system by a qualified, professional fire alarm system
service contractor annually.

S
bedroom

S
living room
H

T
bath

bath
S
T

S
den

family room

S
bedroom

kitchen

required smoke detector
required notification appliance

H
S

additional smoke detector

additional heat detector

Figure 10.0a Detector Location - 3 Sleeping Areas

2nd floor

1st floor

basement

Figure 10.0b Detector Location - Per Floor

4 in.
(100 mm)
ceiling

acceptable here

4 in.
(100 mm)
minimum

never here
12 in.
(300 mm)
maximum

top of detector
acceptable here

side
wall
NOTE:
measurements shown are to the
closest edge of the detector

Figure 10.0c Detector Location - Ceiling/Wall Mount

Sentrol 1-800-547-2556

11.3 2500-ZEM - ZONE EXPANDER MODULE

11.0
PANEL SPECIFICATIONS
11.1 GENERAL
Operating Temperature: ............. 0 to 49OC (32 to 120OF)
Housing
Type ............... Steel with hinged/removable, locking door
Size ...................................... 14.72 in x 21.80 in x 5.20 in
................................... (55.37 cm x 37.39 cm x 13.20 cm)
Finish .............................................................. Red enamel
Weight ................................................................... 16.0 lbs
11.2 2500-BMB - BASIC MASTER BOARD
A. POWER
Input Power ................................................. 110 - 120 VAC
Standby Power ...................................................... 24 VDC
Auxiliary Power Output ..................... 24 VDC, 1.0 A max.
................................................... 26.4 VDC max. - no load
NOTE: Auxiliary power output supply is shared with
power for indicating circuit. Consider total requirement.
(Iaux + I IND #1 + I IND #2 + I IND #3 + I IND #4 = 7.0A)
Optional Standby Battery 24 Volts
Battery Charger Rate ................................... 800 mA max.
Battery Charge Voltage ................................... 28.4 V max.
B. ALARM INITIATING CIRCUITS
Number of Circuits ............................... One - Model 2501
Type ......................................... Class B, Latched (Style B)
End-of-Line Resistance ............................. 2.7k Ohm, 1/2 W
Loop Powered Device Current ............................... 5.0 mA
Maximum Current ................................................ 248 mA
Maximum Voltage............................................... 13.9 Volts
Normal Circuit Voltage ...................................... 12.0 Volts
Minimum Voltage ................................................. 9.6 Volts
Maximum Ripple Voltage ................................ 500 mV AC
Max Line Resistance ........ 30 Ohms (Compat. Ident. C01)
...................... 30 Ohms (Compatibility, Identifier C01A)*

* Not available at this time.
11.4 2500-ZRM - ZONE RELAY MODULE
Number of Circuits ......................................... Two - ZRM2
....................................................................... Four - ZRM4
Contact Ratings ............. 5 A @ 12 VDC, 120 VAC resistive
...................................... 2 A @ 30 VDC, 240 VAC resistive
11.5 2500-BELL - BELL EXPANDER MODULE
A. NOTIFICATION APPLIANCE CIRCUITS
Number of Circuits .......................... Two Class B (Style Y)
Maximum Current per Circuit ....................... 1.5 Amperes
Maximum Total Current ................................ 6.0 Amperes
Output Voltage ........................................ 24 VDC Nominal
............................................. less than 1.0 V p-p AC ripple
End-of-Line Resistance ........................... 2.7k Ohms, 1/2 W
11.6 POWER BOOSTER
Normal Standby Current ....................................... 1.0 mA
Alarm Current ......................................................... 23 mA
Normal Circuit Voltage ................................ 24 V Nominal
End-of-Line Resistance ......................... 2.7k Ohms, 1/2 W *
* The EOL is dependent upon the UL Listed reversing NAC

* Not available at this time.
C. NOTIFICATION APPLIANCE CIRCUITS
Number of Circuits .......................... Two Class B (Style Y)
Maximum Current per Circuit ....................... 1.5 Amperes
Maximum Total Current ................................ 6.0 Amperes
Output Voltage ........................................ 24 VDC Nominal
............................................. less than 1.0 V p-p AC ripple
End-of-Line Resistance ........................... 2.7k Ohms, 1/2 W
D. SUPPLEMENTARY ALARM/TROUBLE CONTACTS
System Trouble .......................... 2.0 A @ 30 VDC resistive
System Alarm ............................. 2.0 A @ 30 VDC resistive
E. SOUNDER OUTPUT
Alarm ...................................................... Constant Output
Fault ............................................ ~0.25 sec on: 2.5 sec off
Supervisory ............................... ~0.25 sec on: 0.25 sec off

A. INITIATING CIRCUITS
Number of Circuits .................. Four - Class B Model 2504
.................................................. Two - Class B Model 2502
Type .......................................... Class B, latched (Style B)
End-of-Line Resistance ........................... 2.7k Ohms, 1/2 W
Loop Powered Device Current .................................. 5 mA
Maximum Current ................................................ 248 mA
Maximum Voltage............................................... 13.9 Volts
Normal Circuit Voltage ...................................... 12.0 Volts
Minimum Voltage ................................................. 9.6 Volts
Maximum Ripple Voltage .................................. 500 mVAC
Max Line Resistance ......... 30 Ohms (Compat. Ident. C01
..................... 30 Ohms (Compatibility Identifier (C01A)*

circuit that is used to signal the power booster. Use the
correct EOL for the UL Listed panel that is connected to the
power boost terminals.

11.7 2500-LEM/LRM
A. LEM
Normal Standby Voltage....................................... 0.5 VDC
Output Voltage (in Alarm) ...................... 24 VDC Nominal
Alarm Current .................................. 110 mA (1.5 A peak)
Standby Current .................................................... 6.5 mA
B. LRM
Normal Standby Voltage....................................... 7.8 VDC
Output Voltage (in Alarm) ...................... 24 VDC Nominal
Alarm Current ............................... 9.15 mA (12 mA peak)
Standby Current .................................................... 2.8 mA
End-of-Line Resistance ........................... 2.7k Ohms, 1/2 W

Sentrol 1-800-547-2556

11.8 2500-RA
Number of Zones .............................. 13 Alarm, 13 Trouble
Standby Current ............................................. 50 mA ± 5%
Alarm Current ............................................... 160 mA max

11.9 2500-RADVR
Number of Zones .............................. 13 Alarm, 13 Trouble
Standby Current ............................................. 50 mA ± 5%
Alarm Current ............................................... 160 mA max
Active Low Output (in Alarm) ............................... -40 mA
Output (in Standby) ............................................ 1.35 mA
11.10

2500-DAC

Standby Current ............................................... 88 ± 7 mA
Alarm Current ............................................... 138 mA max

Sentrol 1-800-547-2556

APPENDIX A
COMPATIBLE EQUIPMENT

The following ESL Four-Wire Smoke Detectors are UL
Listed and voltage compatible with the 2501 (FACP):
ESL Model Series

The equipment listed here is compatible with the 2501
(FACP). USE ONLY UL LISTED COMPATIBLE EQUIPMENT WITH THE 2501 (FACP) SERIES TO ASSURE
PROPER OPERATION. Should you have any questions
about compatibility, call Sentrol Technical Services:
1-800-800-2027.

Suffix Letters

445

C, CT, CR, CRT, CS, CST, CSR, CSRT,
and CSH

449

C, CT, CRT, CST, CSRT, CSRH, CSST,
CSSTE and CTE

741 with 702E, 702U base

742 with 702E, 702U base

204-12/24V EOL Power
Supervision Device

INITIATING DEVICES

Figure A.2 UL Listed Four-Wire Smoke Detectors (Any of these
Four-Wire detectors can be mixed and matched on a system).

ESL Model

Suffix Letters

103-20

Single action SPST manual fire alarm station

103-21

Single action DPST manual fire alarm station

103-22

Dual action SPST manual fire alarm station

103-22S

Dual action SPST manual fire alarm station NY stripe

103-23

Dual action DPST manual fire alarm station

103-24

Dual action, pre-signal DPST manual fire alarm station

103-31

Single action SPST with key reset

103-32

Single action DPST with key reset

103-42

Dual action SPST with key reset

103-60

Weatherproof, single action SPST with key reset
manual fire alarm station

103-80

Explosion-proof dual action DPDT with key reset

104-13

135o fixed temp rate of rise, single circuit heat detector

104-14

194o fixed temp rate of rise, single circuit heat detector

104-15

135o fixed temp, single circuit heat detector

104-16

194o fixed temp, single circuit heat detector

Figure A.1 UL Listed Non-Coded Manual Alarm Stations and
Heat Detectors

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Detector Series

ESL 400

Detector Models

Maximum Line
Resistance
(Ohms)

Control Unit
Compatibility
Identifier

Detector
Compatibility
Identifier

Number
per
Circuit

Base
Compatibility
Identifier

429C, 429CT

C01

S10A

N/A

429CRT, 429CST, 429CSST*

C01A

S11A

N/A

ESL 500

521B, 521BXT

C01

S09A or S10A

N/A

ESL 600

611U, 611UD, 611UT

C01

S10

N/A

(Use 600 Series Bases)

612, 612UD, 613U5

C01

S10

N/A

601U (base)

N/A

S00

602U (base)

N/A

S03

611UD, 612UD

C01

S10

N/A

609U10 (base)

N/A

S00

ESL 609 Duct Detectors

ESL 709 Duct Detectors

ESL 700
(Use 700 Series Bases)

609U11 (base)

N/A

S02

709-DW-21 (721UD)

C01

S10A

709-DW-31(731UD)*

C01

S11A

711U, 711UT, 712U

C01

S10A

N/A

721U, 721UD, 712UT,

C01

S10A

N/A

722U, 713-5U, 713-6U

C01

S10A

N/A

701E, 701U (bases)

N/A

S00

702E, 702U (bases)

N/A

S00

731U, 731UD, 732U*

C01A

S11A

N/A

702RE, 702RU (bases)

N/A

S00

Figure A.3 Two-Wire Smoke Detector Compatibility (any of
these Two-Wire Smoke Detectors may be mixed and matched on
the system.)

* Not available at this time.

Sentrol 1-800-547-2556

NOTIFICATION APPLIANCES
The following devices are UL Listed notification appliances and signaling devices for use with the 2501 (FACP).
ESL Model Series

Description

106-06, 106-10

Vibrating Bell

107-81, 107-82, 107-85, 107-86, 107-87

Horn

108-81, 108-82, 108-83, 108-84, 108-85, 108-86, 108-87, 108-88

Strobes

109-81, 109-82, 109-83, 109-84, 109-85, 109-86, 109-87, 109-88, 109-89, 109-90, 109-91,
109-92, 109-93, 109-94, 109-95

Horn Strobes

110-81, 110-82, 110-83, 110-84

Speakers

111-81, 111-82, 111-83, 111-84, 111-85, 111-86

Speakers Strobes

AU-360-M1, AU-360-M2, AU-360-M1-DMR, AU-360-E,
AU-380-M1, AU-380-M2, AU-380-M1-DMR, AU-380-E,

Voice Evacuation Communication Panel
AU-DMR11, AU-562-2

2500-DAC

Digital Alarm Communicator Transmitter

Figure A.4 2501 (FACP) Compatible Indicating Devices
(All Indicating Devices 24 VDC)

Ordering
Information
DHR-1224C
DHR-1224B
DHR-24120C
DHR-24120B
DHF-1224C
DHF-1224B
DHF-24120C
DHF-24120B
DHS-1224C
DHS-1224B
DHS-24120C
DHS-24120B

Description
EXAMPLE:
12 or 24 V DC/AC, recess mount, chrome, with 3” extension rod
12 or 24 V DC/AC, recess mount, brass, with 3” extension rod
24 or 120 V DC/AC, recess mount, chrome, with 3” extension rod
24 or 120 V DC/AC, recess mount, brass, with 3” extension rod
12 or 24 V DC/AC, semi-flush mount, chrome
12 or 24 V DC/AC, semi-flush mount, brass
24 or 120 V DC/AC, semi-flush mount, chrome
24 or 120 V DC/AC, semi-flush mount, brass
12 or 24 V DC/AC, surface mount, chrome
12 or 24 V DC/AC, surface mount, brass
24 or 120 V DC/AC, surface mount, chrome
24 or 120 V DC/AC, surface mount, brass

Extension Rods
DH-ER1C
DH-ER1B
DH-ER3C
DH-ER3B

1” chrome
1” brass
3” chrome
3” brass

Accessories
DHW
DH-BP
DH-ARMC
DH-ARMB

Extension rod wrenches
Back Plate (Chrome or Brass)
Door holder, armature assembly, chrome
Door holder, armature assembly, brass

Figure A.5 Ordering Information Table

Sentrol 1-800-547-2556

DHF-24210-B
DH = Door Holder
24120 = Model/Voltage
F = Flush
S = Surface Mount
R = Recess Mount
C = Chrome Plating
B = Brass Plating
NOTE: These door holders may
only be used in the 24 VDC configuration. The Aux terminals
may be used to supply power.
Battery saver mode is not acceptable when connecting door holders to the ESL 2501.

APPENDIX B

BATTERY CALCULATION WORKSHEET

2501 (FACP) STANDBY BATTERY POWER WORKSHEET
2501 (FACP)
Component

Standby Current
per Device

Total Standby
Current

135 mA

200 mA

335 mA

Notification Appliance Circuit #1

6 mA*

mA
(1500 mA max)

Notification Appliance Circuit #2

6 mA*

mA
(1500 mA max)

mA
(1000 mA max)

Zone Expander (Model 2504)
4 Class B Zones

40 mA

840 mA with all
zones violated

Zone Expander (Model 2502)
2 Class B Zones

30 mA

830 mA with all
zones violated

Relay Follower Module
(Model 2500-ZRM2)
2 Relay Zone Follower

0 mA

Relay Follower Module
(Model 2500-ZRM4)
4 Relay Zone Follower

0 mA

2500 BMB (includes Zone 1)

Number of
Devices
N/A

Auxiliary System Power

0 mA

Alarm Current
per Device

Total Alarm
Current

30 mA with both
zones violated
(15 mA per zone)

60 mA with all
zones violated
(15 mA per zone)

Bell Expander Module (NAC) #3
(Model 2500-BELL)

6 mA*

mA
(1500 mA max)

Bell Expander Module (NAC) #3
(Model 2500-BELL)

6 mA*

mA
(1500 mA max)

50 mA

55 mA

25 mA**

50 mA**

Remote Annunciator
(Model 2500-RA)

53 mA

168 mA

Remote Annunciator
(Model-RADVR)

53 mA

168 mA

Digital Alarm Communicator
(Model 2500-DAC)

95 mA

138 mA

Local Energy Module
(Model 2500-LEM/LRM)

30 mA

144 mA
(1.8 A peak)

Line Reversal Module
(Model 2500-LEM/LRM)

26 mA

54 mA
(56 mA peak)

Printer Interface Module
(Model ZXPTR)
Centronics Printer Interface
Keypad/Remote Annunciator
(Model 2500-KPD)
Keypad, Programming Device,
and/or Remote Annunciator

Total Current Requirements
* supervision current only
** standby and alarm current for the keypad is 100 mA for 4 minutes after each keypress or after initiating an alarm or trouble condition

Figure B.1 Battery Calculation Worksheet

Sentrol 1-800-547-2556

the indicated mathematical operation. This provides
you with the Standby Amp-hours your system
requires. The REQUIRED # OF HOURS IN STANDBY
varies by locale. Check with the proper Authority
Having Jurisdiction to determine your requirements.
Transfer the Total Alarm Current Requirements to
the TOTAL ALARM CURRENT entry and perform the
indicated mathematical operation. This provides you
with the Alarm Amp-hours your system requires.
The REQUIRED # OF MINUTES IN ALARM varies by
locale. Check with the proper Authority Having
Jurisdiction to determine your requirements.
Carry the calculated values to the proper entries to
arrive at the Minimum Battery Power Required for
your system.
Due to the natural aging effects on batteries due to
time, temperature, cycles and the level of discharge
during cycles, a de-rating factor is applied to help
predict the battery capacity more closely. Please
consult the appropriate manufacturer data sheets for
the appropriate de-rating factor to apply and then
perform the indicated mathematical operation. The
final result is the Total Standby Battery Capacity
required.

BATTERY CAPACITY
The following steps should be used to determine the
correct battery capacities for your system.
7.
1.

First you must determine the exact configuration of
your system from the as built drawings generated
during the installation process.
Determine the number of notification appliances and
the standby current for each notification appliance
on each notification appliance circuit. Complete the
appropriate entries on the worksheet.
Determine the number of devices and the standby
current for each device attached to the Auxiliary
power terminals on the Basic Master Board. Complete the appropriate entries on the worksheet.
From the as built drawings, determine the number of
each type of expansion module (Zone Expander
Module, Relay Follower Module, Bell Expander
Module, Printer Interface Module, Keypad and
Remote Annuciator) on the system and complete the
appropriate entries on the worksheet.
Total the rows across the worksheet and total the
Total Standby Current and Total Alarm Current
columns to arrive at the Total Standby Current
Requirements and Total Alarm Current Requirements for your system.
Transfer the Total Standby Current Requirements to
the TOTAL STANDBY CURRENT entry and perform

.001 Amp/mA
CONVERSION
FACTOR

TOTAL STANDBY
CURRENT

mA X .001 Amp/mA X
TOTAL ALARM
CURRENT

CONVERSION
FACTOR

NOTE: This system always requires two batteries. The
calculations performed indicate the Amp-Hour rating
that each battery must carry. Do not mix batteries of
different capacities.

hours =

Standby Amp - hours

REQUIRED # OF
HOURS IN STANDBY

minutes x .0167 hour/min =
REQUIRED # OF
MINUTES IN ALARM

Alarm Amp - hours

CONVERSION
FACTOR

Standby Amp - hours + Alarm Amp - hours = Minimum Battery Power Required
+
Minimum Battery
Power Required

Battery Capacity
=
Derating Coefficient

Ah
Total Standby Battery Required
(17.2 Ah Maximum)

Sentrol 1-800-547-2556

The following table lists the maximum continuous loads that can be supported by the two 7 Ah or two 17.2 Ah batteries. If
the total standby current exceeds those listed in the table, you do not meet 24 hour standby requirements. Notice that the
Battery Saver Mode doubles the amount of current available to the load. This allows for the use of smaller batteries and the
system still meets the 24 hour standby requirements. Other battery sizes are possible, but two 17.2 Ah batteries are the
maximum battery size supported. If your standby time is different, the above calculations can be used to calculate the Total
Standby Battery Power Required. If the answer exceeds the battery size you have chosen, then appropriate batteries must be
installed or the system configuration must be adjusted to meet the battery power requirements.

Required Batteries

Maximum Continuous Load for 24/60 hour Standby
Normal Mode
Battery Saver Mode
24 hour

60 hour

24 hour

60 hour

Two 7.0 Ah

240mA

100mA

480mA

200mA

Two 17.2 Ah

500mA

200mA

1000mA

400mA

Sentrol 1-800-547-2556

BATTERY CALCULATION WORKSHEET EXAMPLE
2501 (FACP) STANDBY BATTERY POWER WORKSHEET
EXAMPLE:

Battery Calculation System will be one of the 2501, and two each of the Model 2504-ZEMs, 4wire smoke detectors on Zone 1 and 2 with power supervision relays, 2-wire smoke detectors on
Zone 3 through 9, Model 2500-ZRM4 relay follower modules for zones 2 through 9, Bells on
Notification Appliance Circuit (NAC) #1 and Strobes on Notification Appliance Circuit (NAC) #2.

2501 (FACP)
Component
2500 BMB (includes Zone 1)

Number of
Devices

Total Standby
Current

Total Alarm
Current

135 mA

200 mA

335 mA

2 Bells

6 mA*

6 mA

70 mA

140 mA
(1500 mA max)

Notification Appliance Circuit #2

2 Strobes

6 mA*

6 mA

180 mA

360 mA
(1500 mA max)

56 mA

56 mA
(1000 mA max)

40 mA

80 mA

840 mA with all
zones violated

480 mA

30 mA

830 mA with all
zones violated

0 mA

30 mA with both
zones violated
(15 mA per zone)

0 mA

60 mA with all
zones violated
(15 mA per zone)

120 mA

Bell Expander Module (NAC) #3
(Model 2500-BELL)

6 mA*

mA
(1500 mA max)

Bell Expander Module (NAC) #3
(Model 2500-BELL)

6 mA*

mA
(1500 mA max)

50 mA

55 mA

25 mA

50 mA

Remote Annunciator
(Model 2500-RA)

53 mA

168 mA

Remote Annunciator
(Model-RADVR)

53 mA

168 mA

Digital Alarm Communicator
(Model 2500-DAC)
Local Energy Module
(Model 2500-LEM/LRM)
Line Reversal Module
(Model 2500-LEM/LRM

95 mA

138 mA

30 mA

144 mA
(1.8 A peak)
54 mA
(56 mA peak)

Zone Expander (Model 2504)
4 Class B Zones

2 Supervisory
Relays
2

Zone Expander (Model 2502)
2 Class B Zones
Relay Follower Module
(Model 2500-ZRM2)
2 Relay Zone Follower
Relay Follower Module
(Model 2500-ZRM4)
4 Relay Zone Follower

Printer Interface Module
(Model ZXPTR)
Centronics Printer Interface
Keypad/Remote Annunciator
(Model 2500-KPD)
Keypad, Programming Device,
and/or Remote Annunciator

Total Current Requirements

26 mA

283 mA

* supervision current only

Alarm Current
per Device

Notification Appliance Circuit #1

Auxiliary System Power

N/A

Standby Current
per Device

Sentrol 1-800-547-2556

1491 mA

283

mA X .001 Amp/mA X

TOTAL ALARM
CURRENT

CONVERSION
FACTOR

TOTAL STANDBY
CURRENT

1491

.001 Amp/mA

hours =

6.792

Standby Amp - hours

REQUIRED # OF
HOURS IN STANDBY

minutes x .0167 hour/min =

REQUIRED # OF
MINUTES IN ALARM

.373

Alarm Amp - hours

CONVERSION
FACTOR

Standby Amp - hours + Alarm Amp - hours = Minimum Battery Power Required
6.792

Minimum Battery
Power Required

7.165

.373

Battery Capacity
=
Derating Coefficient
1.15

7.165

Total Standby Battery Required
(17.2 Ah Maximum)

8.24

Required Batteries

Maximum Continuous Load for 24/60 hour Standby
Normal Mode
Battery Saver Mode
24 hour

60 hour

24 hour

60 hour

Two 7.0 Ah

240mA

100mA

480mA

200mA

Two 17.2 Ah

500mA

200mA

1000mA

400mA

In this example, the two 7 Ah batteries in Normal Mode would not be sufficient to meet the 24 hour standby based on the
283 mA of continuous standby current required. However, if Battery Saver Mode is used, two 7 Ah batteries are sufficient. If
the Battery Saver Mode is used, the power supervision relays must be rated for 12 VDC operation. This results from the
decision to use Battery Saver Mode. Battery Saver Mode selects the Auxiliary terminals to be 12 VDC output instead of 24
VDC output.

Sentrol 1-800-547-2556

NOTES

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Sentrol 1-800-547-2556

APPENDIX C
2501 (FACP) OPERATING INSTRUCTIONS
Refer to the ESL 2501 Fire Alarm Control Panel Installation Manual for more information, Part # 64812711.
NORMAL STANDBY CONDITION

TROUBLE CONDITION
•Yellow system trouble LED is “ON”
•Yellow local zone LED is “ON”
•Integral sounder sounds a slow intermittent signal
•System common trouble relay contacts transfer

•Green “AC POWER” LED “ON”
•All other LEDs “OFF”
•All switches in “NORMAL” position

ALARM CONDITION
TROUBLE SILENCE SWITCH OPERATED

•Red local zone alarm LED “ON”
•Integral sounder sounds a steady signal
•Common alarm relay contacts transfer and latch
•Indicating circuits turn “ON”

•Integral sounder is “OFF” when system trouble is present
•System common trouble relay contacts not affected
•Will NOT silence supervisory alarm, supervisory trouble or
system alarm signals

ALARM DISCONNECT SWITCH OPERATED (PRIOR
TO ALARM CONDITION) For Maintenance Use Only
•Disconnects local zone alarm from common alarm relay
•Disconnects local zone alarm from the alarm indicating
circuits
•Red local zone alarm LED turns “ON”
•Alarm signal from any other zone is NOT affected

ALARM DISCONNECT SWITCH OPERATED (AFTER
ALARM CONDITION) For Maintenance Use Only
•Alarm indicating circuits are turned “OFF”
•Red local zone alarm LED remains “ON”
•Alarm signal from any other zone is NOT affected

SUPERVISORY ALARM SIGNAL
•Integral sounder sounds a fast intermittent signal
•Red local zone alarm LED is “ON”
•Indicating circuits are NOT activated
•Red supervisory LED is “ON”

SUPERVISORY TROUBLE SIGNAL
•Integral sounder sounds a fast intermittent signal
•Yellow local zone trouble LED is “ON”
•System common trouble relay contacts transfer
•Yellow supervisory LED is “ON”

REMOTE TEST (FIRE DRILL)

RESET SWITCH OPERATED
•Initiating circuit power removed (smoke detectors reset)
•Indicating circuits turn “OFF”
•Integral sounder turns “OFF”
•Common alarm relay is reset
•System restored to normal unless initiating devices are NOT
reset

•Indicating circuits turn “ON”
•Integral sounder sounds a slow intermittent signal
•Common alarm relay contacts do NOT transfer
•Keying the test switch will pulse the indicating circuits

The following applies to Household Fire Warning Systems only:
TESTING – In a Household Fire Warning System, Test Monthly. Disconnect the AC power source
during testing. If, after testing, a low battery condition exists, replace the batteries.
“This equipment should be installed in accordance with the National Fire Protection Association's
Standard 72 (NFPA, Batterymarch Park, Quincy, MA 02269). Printed information describing
proper installation, operation, testing, maintenance, evacuation planning and repair service is to
be provided with this equipment.”
WARNING:
Owner’s instruction notice: “Not to be removed by anyone except occupant.”

FOR SERVICE CONTACT:

Remove this page, frame and mount adjacent to control unit.
Sentrol 1-800-547-2556

79
Part 64812828E

Sentrol 1-800-547-2556

NOTES

Sentrol 1-800-547-2556

NOTES

Sentrol 1-800-547-2556

SENTROL CONTROLS GROUP
PO Box 2904, 1510 Tate Blvd. SE
Hickory, NC 28603
Tel.: 503.692.4052 Fax: 503.691.7566

SENTROL
84

U.S. & Canada: 800.547.2556
Technical Service: 800.800.2027
FaxBack: 800.483.2495

Sentrol 1-800-547-2556

64812711E

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ESL2500 Manual 2711E ESL 2501 Fire Alarm Control Panel Install & Operations 1997

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