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DELTA MCS-1800 Power Shelf
Installation, Operation and
Maintenance Manual

www.deltaww.com

Delta MCS 1800 3U
Power Shelf
Installation, Operations and
Maintenance Manual

DELTA ELECTRONICS, INC.

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

T
Taabbllee ooff C
Coonntteennttss
1. General

---------------------------------------------- 1-1

1.1 Using This Manual

---------------------------------------------- 1-1

1.2

Safety Notice

---------------------------------------------- 1-1

2. Product Description

---------------------------------------------- 2-1

2.1

Product Description

---------------------------------------------- 2-1

2.2

Product Main Features

---------------------------------------------- 2-1

2.3

System Specifications

---------------------------------------------- 2-1

3. Power Supply Unit (PSU)

---------------------------------------------- 3-1

3.1

Description

---------------------------------------------- 3-1

3.2

Specifications

---------------------------------------------- 3-1

3.3

Operation and Adjustment

---------------------------------------------- 3-4

3.4 System Alarm

---------------------------------------------- 3-5

3.5

PSU Block Diagram

---------------------------------------------- 3-5

3.6

PSU Operating Principle

---------------------------------------------- 3-5

4. Alarm Control Unit

---------------------------------------------- 4-1

4.1 Description

---------------------------------------------- 4-1

4.2

---------------------------------------------- 4-1

Specifications

4.3 Alarm Control Unit Block Diagram

---------------------------------------------- 4-4

4.4

---------------------------------------------- 4-4

Settings and Control

5. DC Distribution

---------------------------------------------- 5-1

5.1 DC Cabling

---------------------------------------------- 5-1

5.2

Low Voltage Battery Disconnect (System
equipped with PDU)

---------------------------------------------- 5-1

5.3

Battery Connections (System equipped with
PDU)

---------------------------------------------- 5-1

5.4 Battery Temperature Probe Connection (System
equipped with PDU)

---------------------------------------------- 5-1

6. Installation

---------------------------------------------- 6-1

6.1

Preliminary Inspection

---------------------------------------------- 6-1

6.2

System Mounting

---------------------------------------------- 6-1

6.3

Module Installation

---------------------------------------------- 6-1

6.4

Shelf Wiring

---------------------------------------------- 6-1

6.5 AC Input Connections

---------------------------------------------- 6-1

INDEX i

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

T
Taabbllee ooff C
Coonntteennttss
6.6

Battery String Connections (System equipped
with PDU)

---------------------------------------------- 6-1

6.7 Temperature and Alarm Connections

---------------------------------------------- 6-2

6.8

---------------------------------------------- 6-2

EXT. Breaker trip signal I/P Connector Wiring

---------------------------------------------- 6-2

6.9 AC High Voltage Aux. Relay Output Wiring

7. System Start –Up Procedure

---------------------------------------------- 7-1
---------------------------------------------- 7-1

7.1 Initial Start-Up Preparation
7.3

Basic Functional Verification 7.2
Start-Up

No Load

---------------------------------------------- 7-1

7.4 DC Load Connections

---------------------------------------------- 7-1

7.5

System Functionality Check

---------------------------------------------- 7-1

7.6

System Operation

---------------------------------------------- 7-1

8. System Alarms and Troubleshooting

---------------------------------------------- 8-1

8.1 AC Fail Voltage Alarm Description

---------------------------------------------- 8-1

8.2 High Voltage Shutdown Alarm

---------------------------------------------- 8-1

8.3 High Voltage Alarm Description

---------------------------------------------- 8-1

8.4

Low Voltage Alarm

---------------------------------------------- 8-2

8.5

Low Voltage Disconnect Alarm (System
equipped with PDU)

---------------------------------------------- 8-2

8.6

Fuse Fail Alarm (System equipped with PDU)

---------------------------------------------- 8-2

8.7 Alarm Unit Fail

---------------------------------------------- 8-3

8.8

---------------------------------------------- 8-3

Rectifier Fail Alarm

9. Maintenance

---------------------------------------------- 9-1

9.1 Cleaning and Maintenance

---------------------------------------------- 9-1

9.2

---------------------------------------------- 9-1

Removing and Replacing a Rectifier Unit

10. Acronyms and Abbreviations

---------------------------------------------- 10-1 ~3

ATTACHMENT

INDEX ii

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

1 General
1.1 Using This Manual
This manual contains specifications and instructions to properly install and maintain the power supply system.
Component specifications and drawings are also included.
This manual contains information related to the operation and maintenance of the Alarm Control Unit (ALU),
the –48V/+24V Power Supply Unit (PSU), and the Distribution Module. Additional information is provided
on system status and alarms, troubleshooting, and system maintenance. Appendix figures of this manual
contains drawings, simple block diagram for different functional blocks and systems schematic.
Step-by-step procedures required for the installation and turn-up are detailed. All equipment parameter
setting, adjustments, and confirmation, as well as system monitoring, operations, and maintenance procedures,
are included.
Warnings are printed in bold, italic lettering. They alert the installation or maintenance craftsperson of a
potential hazard to either the equipment or the craftsperson if the warning is not followed.

1.2 Safety Notice
Delta Energy Systems is not liable for any hazards incurred by not following proper safety procedures.
Installation, operation, and maintenance personnel should always follow these safety rules:
1.

Before installing the system, verify the AC input voltage and frequency, the AC breaker rating and type,
and other environmental conditions as noted in the specifications.

2.

The system has passed stringent system testing prior to shipment. To avoid electrical shock. The
rectifier system requires a single ground point permanently connected to earth ground.

3.

An AC breaker must provide adequate isolation between the system input and commercial AC main.

4.

The environment should be dust free and controlled by an AC system.
flammable vapors or fluids.

5.

To avoid electrical hazard, the covers must not be removed on any component, including the ALU and
the rectifier.

6.

Circuit breakers or fuses must be replaced with approved replacement circuit breakers meeting the
original design specification.

7.

All connections must be made per the latest issue of the applicable national and local codes.

1-1

The area must be free of any

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

2 Product Description
2.1

Product Description
This power Shelf consists of modular rectifiers, an Alarm Control Unit (ALU), and a DC distribution
module. Up to four rectifiers and an alarm unit can be equipped on a shelf containing an integrated distribution
module. The rectifiers can operate from a universal range of AC line voltages. The High Line (HL)
operations are defined at an AC line input range of 165VAC~ 264VAC. The Low Line (LL) operations are
defined at an AC line input range of 90 VAC-130 VAC.
The system is controlled and monitored by the ALU. System level rectifier voltage settings, system
status, and alarms are displayed on the ALU. The system float voltage, equalize voltage, and alarm thresholds
are set from RMS. The ALU also provides automatic derating of the output power over the whole operating
line voltages. Figure 1 shows different functional blocks of the system.

2.2

Product Main Features
The Power Shelf has the following main features:
-48 VDC/120 Amps, or +24VDC/200Amps, N+1 redundancy
Modular design for scalable, cost effective expansion
Front access for simple installation and maintenance
High power density
Active Power Factor Correction (>. 99PFC)
High efficiency
Temperature compensated float voltage control
Alarm Control Unit
Low Voltage Battery Disconnect (LVBD) (System equipped with PDU)
Remote Monitoring and control

2.3

System Specifications
The system specifications are provided in the following sections.

2.3.1 -48V Standard Power Shelf Configuration(MODUL NAME: ES48/120-JAAxx)
(1) AC Input:

175VAC ~ 275VAC, 48Amps. Max

(2)

System Capacity:

120Amps. Max.

(3)

Rectifier:

-48V/30A×1~4

(4) Control and Supervisory Unit
Figure 1 shows a front view of shelf.

2-1

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
Environmental Data
System Environmental Data
Specification

Value

Operating temperature

0℃ to +50℃

Storage temperature

-40℃ to +70℃

Humidity

0% to 95% RH

Altitude

-300 ft. to 10,000 ft.

Weight

Approximately 48 lbs.

EMI/FRI

FCC Part 15, Class B and CISPR 22, Class B

Lightning/surge

ANSI/IEEE C62.41-1, and IEC 1000-4-5

Seismic

Bellcore GR-63-CORE, Zone 4

Safety

CUL and UL Listed and Marked

2.3.2 +24V Standard Power Shelf Configuration(MODUL NAME: ES24/200-JAAxx)
(1) AC Input:

175VAC ~ 275VAC, 48Amps. Max

(2)

System Capacity:

200Amps. Max.

(3)

Rectifier:

+24V/50A×1~4

(4)

Control and Supervisory

Figure 1 shows a front view of shelf.
Environmental Data
System Environmental Data
Specification

Value

Operating temperature

0℃ to +50℃

Storage temperature

-40℃ to +70℃

Humidity

0% to 95% RH

Altitude

-300 ft. to 10,000 ft.

Weight

Approximately 48 lbs.

Lightning/surge

ANSI/IEEE C62.41-1, and IEC 1000-4-5

Seismic

Bellcore GR-63-CORE, Zone 4

Safety

CUL and UL Listed and Marked

2.3.3 -48V System with Power Distribution and Rectifiers(MODUL NAME: ES48/90-JBAxx)
(1) AC Input:
175VAC ~ 275VAC, 36Amps. Max
(2)

System Capacity:

90Amps. Max.

(3)

Rectifier:

-48V/30A×1~3

(4)

Control and Supervisory

(5)

Load Distribution:

30A Breaker×5 @ Single Pole

(6) Low Voltage Disconnect Switch: 100A×1 @ Single Pole at Battery Side
(7)

Battery Breaker:

100A×1

(8) AC Breaker
2-2

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
Figure 1-1 shows a front view of shelf.
Environmental Data
System Environmental Data
Specification

Value

Operating temperature

0℃ to +50℃

Storage temperature

-40℃ to +70℃

Humidity

0% to 95% RH

Altitude

-300 ft. to 10,000 ft.

Weight

Approximately 48 lbs.

Lightning/surge

ANSI/IEEE C62.41-1, and IEC 1000-4-5

Seismic

Bellcore GR-63-CORE, Zone 4

2.3.4 -48V System with Power Distribution and Rectifiers(MODUL NAME: ES48/90-JFAxx)
(1) AC Input:
175VAC ~ 275VAC, 36Amps. Max
(2)

System Capacity:

90Amps. Max.

(3)

Rectifier:

-48V/30A×1~3

(4)

Control and Supervisory

(5)

Load Distribution:

100A Breaker×4 @ Single Pole

(6) Low Voltage Disconnect Switch: 100A×1 @ Single Pole at Battery Side
Figure 1-1 shows a front view of shelf.
Environmental Data
System Environmental Data
Specification

Value

Operating temperature

0℃ to +50℃

Storage temperature

-40℃ to +70℃

Humidity

0% to 95% RH

Altitude

-300 ft. to 10,000 ft.

Weight

Approximately 48 lbs.

EMI/FRI

FCC Part 15, Class B and CISPR 22, Class B

Lightning/surge

ANSI/IEEE C62.41-1, and IEC 1000-4-5

Seismic

Bellcore GR-63-CORE, Zone 4

Safety

CUL and UL Listed and Marked

2.4 Electrical Data
The system electrical data is provided in the following tables.
2.4.1 Input

2-3

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
Table 1 displays the system input specifications.
Table 1 System Input Specifications
Specification
Nominal range

Value

Operational range

175 ~ 275VAC
90 ~ 275VAC Full Load
150V ~ 175Vac de-rating to 80% Load
90V ~ 150Vac de-rating to 50% Load
50℃ ~ 65℃ de-rating 1500W

Frequency
Power Factor
THD
Efficiency

45 ~ 65Hz
>0.99 @ 220VAC, Full Load
<5% @ 220VAC, Full Load
>90% @ 220VAC, Full Load

2.4.2 Output
Table 2 displays the system output specifications.
Table 2 System Output Specifications
Specification

Load regulation

Value
38~60 VDC (-48V Version)
20~30 VDC (+24V Version)
<1%

Line regulation

<0.2%

Current Limit

110%

Current share
Noise:
Audio band
Wide band
Acoustic

<5%

DC Volts

<2mv
<10 mVrms
<55 dBA

2.4.3 Status/Alarm Indicators
The Power Shelf has the following status/alarm indicators:
Load Current
AC ON
Rectifier Fail Alarm (RFA)
Current Limit (CL)
Float/Equalize (FL/EQU)
Major Alarm (MAJ)
Minor Alarm (MIN)
High Voltage Alarm (HV)
High Voltage Shutdown (HVSD)
Low Voltage Alarm (LV)
Low Voltage Disconnect Open (LVDS OPEN)
Fuse Blown (FUSE ALM)
AC Fail (AC FAIL)

2-4

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
2.4.4 Mechanical Data
Dimension

Value

Height

5.2 in. (132mm)

Depth

10.35 in. (263mm)

Width

3.3 in. (83.6mm)

2-5

DELTA MCS-1800 3U Power Sh elf
Installation, Operations and
Maintenance Manual

3 Power Supply Unit (PSU)
3.1 Description
This rectifier units are rated at full load when operated from high line. For Low operation, the output is
derated to half load. This derating is automatically activated from the Alarm Control Unit (ALU). However,
the rectifier can operate on a stand-alone basis, if this ALU is removed or nonfunctional.
Warning: In the absence of the ALU, the automatic derating of the rectifiers at Low Line is not effective.
Exceeding the 50% load limit at Low Line may damage the rectifiers.
The modular design provides the flexibility to configure and expand the system as the load demand
increases. Each rectifier unit is swappable with front access for ease of maintenance without system shutdown,
providing uninterrupted service.
The rectifier unit has an active power factor correction of greater than 0.99 for maximum AC utilization.
Each module is equipped with an AC switch located at the front of the module. Figure 3 shows a front view of
PSU.
Note: The equipment is only for installation in a Restricted Access Location.
The equipment is used on a stationary equipment/unit only.

3.2 Specifications
Detailed rectifier specifications are provided in the following sections.
3.2.1 Electrical
Detailed electrical specifications for the rectifier are provided in this section.
3.2.1.1 Input
Table 6 displays the rectifier input specifications.
Table 6 Rectifier Input Specifications
Specification

Value

Input Voltage

90VAC to 275VAC, Single Phase, (during 176 to 150VAC
derated to 80% Load, during 150 to 90VAC derated to 50% Load)

Input Current

12 Amps at 176 VAC, Full Load

Line Frequency

45 to 65 Hz

Power Factor

>0.99, at 220 VAC Input, Full Load

THD

<5%, at 220 VAC Input, Full Load

Efficiency
Inrush Current

>90%, Full Load (-48V Version)
>88%, Full Load (+24V Version)
<12 Amps (peak), 220 VAC, Full Load, Cold Start

Start Time Delay
3 to 10 seconds
(Walk-In)
Protection

Fuse

3-1

DELTA MCS-1800 3U Power Sh elf
Installation, Operations and
Maintenance Manual
3.2.1.2 Output
Table 7 displays the rectifier output specifications.
Table 7 Rectifier Output Specifications
Specification

DC Output Voltage

Output Power

Value
40 to 60VDC [factory preset at –54.3VDC, 30Amps (HL) /
15Amps (LL)] –48V Version
20 to 30VDC [factory preset at 27.2VDC, 50Amps (HL) /
25Amps (LL)] +24V Version
1800W Maximum (-48V Version)
1500W Maximum (+24V Version)

Regulation:
Load
Line
Current Limit

<1% (Load 0 to 100%)
<0.1%
110% Max. of Rated Output Current

Noise:
Audio Band
Wide Band
Acoustic
Current Sharing

<2mV
<20 mVrms (10 KHz to 100 MHz)
<55 dBA @ 1M
<5% of Rated Output Current

Dynamic Response

10% to 90% Load Change Overshoot ≤5% Rated Output
Voltage Recovery Time <1 ms to ≤1% Rated Output Voltage

Protection

Fuse

3.2.1.3 Protection
Table 8 displays the protection specifications.
Table 8 Protection Specifications
Condition

Response

High Output Voltage (Exceeds
Automatic Shutdown and Latch
Preset Value)
Over Current/Output Short

Automatic Shutdown and Recovery

Over Temperature

Automatic Shutdown and Recovery

Brownout

No Damage

AC Input Voltage High

Automatic Shutdown and Recovery

AC Input Voltage Low

Automatic Shutdown and Recovery

3-2

DELTA MCS-1800 3U Power Sh elf
Installation, Operations and
Maintenance Manual
3.2.1.4 Adjustments
Table 9 displays the adjustments.
Table 9 Adjustments
Adjustment

Description

Test Points (I+,I-)

Current

Float Voltage (FLO)

Variable Resistor or Setting on ALU

Current Limit (CL)

Variable Resistor or Setting on ALU

3.2.2 Environmental
Table 10 displays the environmental specifications.
Table 10 Environmental Specifications
Specification

Value

Operating temperature

32 to +122℉ (0℃ to +50℃) OPTION

Storage temperature

-40 to +185℉ (-40℃ to +85℃)

Humidity

0% to 95% Relative Humidity No condensing

Altitude

-5.2”/132mm

Weight

3.3 Kg (7.26 lbs.)

EMI/FRI suppression

Conforms to EN 55022, BS 6527 FCC Part 15 Subpart J,
and CISPR 22 Class A

Current harmonic

Conforms to EN 61000-3-2/A12, EN 60555-2, IEC
1000-3-2 Class A

Voltage fluctuation

Conforms to EN 61000-3-3M, EN 60555-3

Electrostatic discharge

Conforms to EN 61000-4-2, IEC 1000-4-2, IEC 801-2
Level 4

Radiated susceptibility

Conforms to IEC 1000-4-3, IEC 801-3 Level 3

Electrical fast transients

Conforms to EN 61000-4-4, IEC 1000-4-4, IEC 801-4
Level 4

Conducted susceptibility

Conforms to IEC 1000-4-6 Level 3

Lightning/surge

Conforms to ANS/IEEE C62.41.-1, 1991 B3, IEC
1000-4-5 Level Special (6KV)

Safety

Meets IEC 950, EN60950, UL/CUL/CE Approval

MTBF

>150 K hours

Cooling

Fan cooling

Heat dissipation

682 BTU/hour max. per module (-48V Version)
698 BTU/hour max. per module (+24V Version)

3-3

DELTA MCS-1800 3U Power Sh elf
Installation, Operations and
Maintenance Manual
3.2.3 Status/Alarm Indicators
Table 11 displays the status alarm indicators
Table 11 Status Alarm Indicators
Indicator

Color

Function

Description

LED

Amber

CL

Current Limit

LED

Green

AC

AC ON

LED

Red

RFA

Rectifier Failure Alarm

3.2.4 Mechanical Data
Table 12 displays the rectifier mechanical data.
Table 12 Rectifier Mechanical Data
Dimension

Value

Height

5.2 in. (132mm)

Depth

10.35 in. (263mm)

Width

3.3 in. (83.6mm)

3.3 Operation and Adjustment
All operating adjustments are made at the front panel of each rectifier. The following components are
located on each rectifier panel:
1.

Float voltage adjustment

2.

Current limit adjustment

3.

Current test points

4.

Alarm indicators
Figure 3 shows different indicators and adjustment points on this unit.

Rectifier adjustments must be done sequentially from the first through the fourth rectifier with AC applied.
All adjustments must be made with no load, and the batteries disconnected to ensure adjustment accuracy.
3.3.1 Start-Up
To start up the system, perform the following steps:
1.

Aproximately 3 to 8 seconds after the AC applied, the RFA LED extinguishes.

3.3.2 Float Voltage Adjustment
Verify the required float voltage setting per battery manufacturer specification. If the factory setting differs
from the battery manufacturer recommended setting, the ALU float voltage parameter and each rectifier’s
float voltage must be adjusted to the new setting. A digital multimeter and a small screwdriver are required
to perform this procedure. Located the float voltage access point (FL) at the front of the rectifier.
To adjust the float voltage, perform the following steps:
1.

Remove the ALU.

3-4

DELTA MCS-1800 3U Power Sh elf
Installation, Operations and
Maintenance Manual
2.

Place the digital multimeter probe in the V+ and V- output voltage connecter.

3.

Adjust the float voltage by using a screwdriver to turn the FL point to the voltage value as shown on
the meter. The tolerance error should not exceed 0.02V.

Notes:
1.

Turning the variable resistor adjustment point clockwise increases the value, and counterclockwise

2.

Refer to Figure 3 (rectifier front view) for the location of V+, V- and FL point.

3.

When the setting is completed, temperature and voltage compensation must be reset to the default
value.

3.3.3 Current Limit Setting
Warning: Current limit setting is not intended to be adjusted in the field. Users should only use it for
their reference.
Current limit adjustment is made by turning the CL variable resistor with the digital multimeter probes
in the I+, I- test points. This current limit is set at the factory. The factory setting is always the
maximum value of 110%. For a 48V/30 Amp rectifier, the computation for the current limit is
1.1×30=33 Amps.
The following adjustment procedure is for reference only:
1.

At the rectifier, place the digital multimeter probes in the I+, I- test points.

2.

Place a small screwdriver in the CL adjustment point.

3.

Turn the variable resistor counterclockwise to increase the value.
clockwise to decrease the current limit value.

Turn the variable resistor

3.4 System Alarm
During an alarm condition, the faulty rectifier illuminates its RFA light on the front panel. The rectifier
fail alarm signal is sent to the ALU, which processes the alarm, closes the RFA alarm contacts, and lights the
alarm LEDs.

3.5 PSU Block Diagram
Refer to Figure 5.

3.6 PSU Operating Principle
After applying the incoming line voltage to the rectifier, current is applied to the EMI filter and circulates
through protection components such as the AC circuit breaker and the fuse. The major functions of the
protection devices are to prevent the rectifier from being damaged by surge voltage, to efficiently reduce the
noise of differential mode and common mode, to eliminate the high frequency noise from input current, and to
prevent noise reverse to the source circuit.
The AC input voltage is rectified and converted to a 400VDC bus through a PFC boost stage.
stage maintains the Power Factor at >.99 and the Total Harmonic Distortion (THD) at <5%.

This PFC

The 400 VDC bus voltages is modulated at a frequency higher than 100KHz and stepped down through a
transformer. Output of this transformer is rectified and filtered to provide the output DC voltage.

3-5

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

4 Alarm Control Unit
4.1 Description
The Alarm Control Unit (ALU) with RS232 & LAN interface and remote monitoring function provides
output alarms, alarm threshold adjustments, float and equalize voltage adjustments, temperature compensation
voltage settings, low voltage disconnect voltage threshold settings, an equalize charge timer, and system alarm
LEDs. In addition, the ALU automatically derates the system output current according to the following table:
Figure 2 shows a front view of Alarm control unit.
Table 13 Voltage Ranges
Input Voltage Range

Output

90-150 VAC

50%

150-175 VAC

80%

176-275 VAC

100%

The module is hot swappable.

4.2 Specifications
4.2.1 Input Characteristics
Table 14 displays the input characteristics.
Table 14 Input Characteristics
Characteristic
Input Voltage Range
Input Current

Value
40V to 59.5V for 48V system
20V to 30V for 24V system
<0.5 Amps

4.2.2 Push Buttons
This alarm unit has 3 push buttons on the front panel. These push buttons are used to control the
alarm unit. Following are possible functions these buttons will act:
Control
-

FL/EQU

-

HVSD RST

-

SMR RST

-

Voltage/Current Display

4-1

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

Settings

Description

FL/EQU
- Function
HVSD RST
- Function

- This button is used to manually select SMR into float or equalize state.
- When SMRs shut down resulting from DC high voltage.
used to reset alarm state.

SMR RST
- Function

This button is

System will detect RFA warning when SMRs are vacant or turned off.
However, if the button is pushed at this time, the system will stop
sending the warning.

Voltage/Current
- Function

This button is used to change the voltage or current of LED display.

Notice: When SMR turn off , the system will detect RFA warning in ES48/90-JFAxx.
When SMR vacant , the system will detect RFA warning in other system.
4.2.3 Indicators
Table 15 displays the ALU indicators.
Table 15 ALU Indicators
Indicator

Color

Function

Description

LED1

Green

FL

LED2

Yellow

EQU

LED3

Red

HV

DC High Voltage Alarm-Minor

LED4

Red

LV

DC Low Voltage Alarm-Minor

LED5

Yellow

MIN

System Minor Alarm

LED6

Red

MAJ

System Major Alarm

LED7

Red

HVSD

LED8

Red

AC FAIL

LED9

Red

FUSE ALM

LED10

Red

LVDS OPEN Low Voltage Disconnect Open

System Float State
System Equalize State

High Voltage Shutdown (DC)
Loss of AC Input
DC Output or Breaker SW. Trip

4.2.4 Relay Output
Table 16 displays the relay output.(Please refer to Figure 5)
Table 16 Relay Output
Relay

Function

Relay1

ACF

Relay2

MAJ

Relay3

HVSD

Relay4

HV

Description

Relay

Function

AC Failure

Relay5

LV

Major Alarm

Relay6

LVD

High Voltage Shutdown

Relay7

FA

DC High Voltage
Alarm-Minor

Relay8

MIN

4-2

Description
DC Low Voltage
Alarm-Minor
Low Voltage Disconnect
Open
Breaker Trip
Alarm
Minor Alarm

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
4.2.5 ALU Alarm Signal Descriptions
MAJ:

Major Alarm
(1)

2 or above rectifiers fail.

(2)

Temperature sensor disconnects.

(3)

AC Low Voltage Alarm.

(4)

AC High Voltage Alarm.

(5)

LVDS Trip Alarm. (System equipped with PDU)

(6)

Battery or Ambient over temperature. (System equipped with PDU)

(7)

HVSD Alarm.

(8)

Breaker Trip Alarm.

MIN:

Minor Alarm
(1)

One rectifier fail.

(2)

Current Limit Alarm.

(3)

DC High Voltage Alarm.

(4)

DC Low Voltage Alarm.

HV:

The alarm condition exists when the DC output voltage is higher than the parameter setting.

LV:

The alarm condition exists when the DC output voltage is lower than the parameter setting.

AC Fail:

The alarm condition exists when the AC voltage is absent.

LVDS:

The alarm condition exists when the DC output voltage is lower than the threshold voltage.
(System equipped with PDU)

Fuse Fail:

The alarm condition exists when the battery switch trip off or the DC Load output switch trip off.

4.2.6 Physical
Table 18 displays the ALU mechanical data.
Table 18 ALU Mechanical Data
Dimension

Value

Height

5.2 in. (132mm)

Depth

9.9 in. (251.3mm)

Width

1.9 in. (46.2mm)

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DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
4.2.7 Environmental
Table 19 displays the environmental specifications.
Table 19 Environmental Specifications
Specification

Value

Operating temperature

32℉ to +122℉ (0℃ to +50℃)

Storage temperature

-40℉ to +185℉ (-40℃ to +85℃)

Humidity

0% to 95% Relative Humidity No condensing

Altitude

-500 to 10,000 ft.

Weight

2.64 lbs. (1.2Kg)

ESD

IEC 1000-4-2 (Contact 4KV Air 8KV)

4.2.8 Remote monitoring and control
The ALU provide the flowing remote monitoring methods.
1.

Use RS232 Interface.

2.

Use Internet Web server function (RJ45)-(Optional)

4.2.10 Parameter Modify
Enter the Remote monitoring software or use the internet Brower to modify the parameter.

4.3 Alarm Control Unit Block Diagram
Refer to Figure 7.

4.4. Settings and Control
Settings:
Settings
DC High Voltage Shutdown
Function
Default
Recovery
Steps
DC High Voltage Alarm
Function
Default
Recovery
Steps
DC Low Voltage Alarm
Function
Default
Recovery

Description
-

High voltage shutdown threshold adjustment
58.5VDC (-48V System)
29.5VDC (+24V System)
57.5VDC (-48V System)
28.5VDC (+24V System)
0.1VDC

-

High voltage alarm threshold adjustment
57.5VDC (-48V System)
29VDC (+24V System)
56.5VDC (-48V System)
28VDC (+24V System)
0.1VDC

-

Low voltage alarm threshold adjustment
44.0VDC (-48V System)
23VDC (+24V System)
45.0VDC (-48V System)
24VDC (+24V System)
4-4

Comment

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
Settings
Steps
AC High Voltage Alarm
Function
Default
Recovery
Steps
AC Low Voltage Alarm
Function
Default
Recovery
Steps
Temperature Alarm
Function
Default
Steps
Site ID
Function
Setting
Floating / Equalize charging
voltage
Function
Default

Steps
LVDS Trip Voltage
Function
Default
Recovery
Steps
Compensation On/Off
Function
Setting
Default
Compensation Volt. Range
Function
Default
Steps
Equalize Duration Time
Function
Default
Steps
Mains Recovery Charging
Current Limited

Description
-

0.1VDC

-

AC high voltage alarm threshold adjustment
264V
261V
1V

-

AC Low voltage alarm threshold adjustment
176V
179V
1V

-

Battery Temperature alarm
104℉ (40℃)
1℃

-

Set identification number for this site
4 digits and number range is 0-9

-

Float / Equalize charging voltage
Float
54.3VDC (-48V System)
27.2VDC (+24V System)
EQUALIZE
56.4VDC (-48V System)
28.2VDC (+24V System)
0.1V

-

Sets LVDS trip voltage
42VDC (-48V System)
22VDC (+24V System)
When one rectifier work normally and not in the
CL Mode
- 0.1V

-

Enable / Disable Temperature Compensation
feature
- ON/OFF
- On

-

To set Temperature Compensation Voltage
-1.3VDC~+1.3VDC (-48V System)
-0.7VDC~+0.7VDC (+24V System)
0.1V
To set the duration of equalizes charging after
AC recovery. This setting is active when battery
deeply discharge resulting from AC fail.
1-10 hours
1 hour
When mains recovery to avoid the charging
current too large, CSU will limit the charging
current.
[ (IL+ Max. Cap.) / Parameter] / available SMR
4-5

Comment

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
Settings
Function
Battery Max. Capacity
Default
Range
Parameter
Default
Range
Temperature Shut Down
Function
Default
Recovery

Description

-

74AH
1~2500 AH

-

4
1~20

-

High Temperature Shutdown
149℉
122℉

Comment

Control:
Settings
Remote SMR On/Off
- Function
-

Description

Description
-

Remote SMR on/off capability exists through the SMR Shutdown
(1-3)
CSU control.

-

CSU automatically shuts down SMR in case of
DC high voltage.
Users can manually shut down SMR from
Remote Management System.

Floating / Equalize control
- Function
-

Description

-

HVSD Recovery
- Function

Comment

-

SMR floating/equalize status can be set through
the CSU control.
CSU automatically transfer SMR to floating
mode in case of mains recover after deep
discharge resulted from blackout/battery test
Users can manually set SMR to floating or
equalize from CSU.
When system HVSD alarm recovery and system
voltage reduce to normal, this function is used to
reset the HVSD alarm

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DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

5 DC Distribution
5.1 DC Cabling
You can find DC output which marked Load + and Load – behind the shelf of the left hand side.

5.2 Low Voltage Battery Disconnect (System equipped with PDU)
The low voltage disconnect contactor is installed in front of the battery connection bus. Battery and system
bus are connected in parallel. When LVDS opens, it disconnects the batteries from the system bus.

5.3 Battery Connections (System equipped with PDU)
The battery connections which are behind the distribution module should be made through the breaker.
BAT + for battery positive and BAT – for battery negative.

5.4 Battery Temperature Probe Connection (System equipped with PDU)
The battery temperature probe senses the battery temperature and sends the signal back to the ALU. The
temperature is used to determine the temperature compensation voltage. A temperature sensor is included
with each Power Shelf. To connect the temperature sensor, perform the following steps:
1.

Connect the sensor to the connector labeled TB located behind the shelf.

2.

Attach the copper lug sensor to the center position.

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DELTA MCS-180 3U 0 Power Shelf
Installation, Operations and
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6 Installation
6.1 Preliminary Inspection
Prior to removing the system from the crate, note any damage to the carton. Remove the system from the
packaging and inspect the shelf and components for any dents or damage. If any damage is noted, contact
the carrier immediately.

6.2 System Mounting
The power system is typically shipped with the shelf in one carton and rectifiers in individual cartons. The
shelf typically is shipped with the ALU and the distribution module. The module can be mounted in a
19”relay rack provided by the customer.
This system allows the relay rack to be installed as close to a rear wall as is necessary for the installation.
The front of the system should be clear of all obstruction and allow room for proper ventilation, installation,
and maintenance.

6.3 Module Installation
In order to reduce the weight of the system, all power modules can be removed from the shelf when mounting
the shelf onto a rack.
1)

Ensure that the AC power is isolation.

2)

Loosen the fixed thumbscrew on the rectifier and pull the rectifier out.

3)

Loosen the fixed thumbscrew on the ALU panel and pull the ALU out.

4)

Reverse the procedure, to install the rectifier and ALU.

6.4 Shelf Wiring
The shelf comes fully assembled and is equipped with the ALU and the distribution module.
connections are made at the factory. No internal, shelf, or module wiring is required.

All internal

6.5 AC Input Connections
The power system is equipped with one power terminal located at the center rear of the shelf.
Warning:

1. AC power wire cannot less than AWG 10 and failure to use the appropriate power wire
causes safety hazards.
2. Each shelf requires a properly grounded AC input feeds supplied by Delta.
3. The system operates at AC voltages that can produce fatal electrical shock. Installation
and maintenance personnel must observe all safety precautions.
4. Confirm the operating voltage and proper grounding of the incoming line before
proceeding.

6.6 Battery String Connections (System equipped with PDU)
Warning:

1. Verify the polarity of the battery leads prior to connecting the battery cables to the system.
Failure to connect the battery cables correctly to the system can cause damage to batteries
and the system.

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DELTA MCS-180 3U 0 Power Shelf
Installation, Operations and
Maintenance Manual
2. While connecting the battery cables inside the distribution module, make sure the system
is completely disenergized (that is, the AC lines are turned off and the battery cables are
disconnected at the battery end).
3. The system voltage (rectifier output voltage) is –48VDC. Connect the positive battery
cable(s) to the BATT + and connect the negative battery cable(s) to the BATT -.

6.7 Temperature and Alarm Connections
6.7.1 Battery Temperature Sensors
One (1) battery sensor cable is provided with each system.
section 5.4.

The connection method please refers to

6.7.2 External Alarm Connections
1.

Table 21 Alarm Terminal Block Pin Assignments
Alarm

Description

ACF

AC Fail

MAJ

Major

HVSD

High Voltage Shutdown

HV

High Voltage Alarm

LV

Low Voltage Alarm

LVD

Low Voltage Disconnect

FA

Fuse Alarm

MIN

Minor

2. Each alarm connection is provided with a normally close relay contact. This contact is capable of
carrying 0.5 Amp DC at 30VDC on a continuous basis.
3. Warning: All external circuits connected to these alarm relay terminals must be secondary and
properly isolated from the incoming line.

6.8

Connect the PDU signal cables to the rear of the shelf which are mark “EXT. Breaker trip
signal I/P” connector.
The “FUSE ALM” LED on the front panel of ALU will light up when the breaker open.

6.9 AC High Voltage Aux. Relay output wiring
The connection point of “AC High Voltage Trigger Relay” which is on the rear of shelf will close when the
AC input voltage is higher than the setting value normally it’s open.

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DELTA MCS-1800 3U Power Shelf
Installation, Operations and
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7 System Start-Up Procedure
7.1 Initial Start-Up Preparation
1.

Verify all connections prior to starting this section.

2.

Confirm the operating voltage before proceeding.

3.

Ensure that the AC line is properly grounded.

4.

Ensure the battery DC circuit breaker is switched to the “OFF” position

5.

Ensure the PSU breaker is switched to the “OFF” position.

7.2 No Load Start-Up
The system can be started up without a load.

To start up the system, perform the following steps:

1.

Switch all DC distribution circuit breakers to the “OFF” position and/or remove all the fuses. If there is
the PDU in the system.

2.

Verify that the battery is not connected to the system battery bus or ensure the battery switch in the “OFF”
position.

3.

Check the ALU for alarm and status conditions.

7.3 Basic Functional Verification
After system start-up, basic functional verification should proceed as follows:
1.

Check the ALU status and alarm LEDs.

2.

Compare the rectifier DC voltage readings at the ALU with the output voltage of each rectifier by using
digital multimeter (measure at the V+ and V– points located on the front of each rectifier).

3.

The “FUSE ALM” LED on the panel light because the battery breaker is switched to “OFF”.

7.4 DC Load Connections
1.

Connect the positive load wires to the Load +.

2.

Connect the negative load cable to the Load -.
Please refer to section 5 DC Distribution.

7.5 System Functionality Check
Control and supervisory functional testing can be performed at the ALU after the basic functional testing
is completed and the DC load is connected.
7.5.1 System Status and Alarms
Check the status of the equipment by viewing the ALU alarm and status LEDs.

7.6 System Operation
Upon completion of the system functional testing, the system is operational.

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DELTA MCS-1800 3U Power Shelf
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8 System Alarms and Troubleshooting
8.1 AC Fail Voltage Alarm Description
8.1.1 Description
If the ALU detects an input AC voltage below 50 VAC, the ALU sends an AC Fail alarm signal and
activates the dry contact. The AC Fail LED on the ALU panel lights up. When AC voltage is restored to the
nominal input voltage, the ALU extinguishes the AC Fail LED, and returns the contact to the normally closed
position.
8.1.2 Troubleshooting
The AC Fail alarm is normally caused by a commercial AC interruption due to a storm or maintenance.
If commercial AC is detected at the AC panel, check the rectifier input breakers in the AC panel for a tripped or
failed breaker.
Warning:

The ALU senses the AC line through the AC Input terminal. If this connection is missing, the
system generates an AC Fail alarm.

8.2 High Voltage Shutdown Alarm
8.2.1 Description
When the ALU detects the output DC voltage exceeding the HVSD threshold setting, the ALU sends an
HVSD alarm signal and activates the dry contact. The ALU lights the HVSD LED located on the ALU panel
and shuts down each rectifier. At this point, the system is running on reserve batteries. When the DC voltage
falls below the HVSD threshold voltage, and push the HVSD RST Button, then the system recovers. The ALU
extinguishes the HVSD LED, returns the rectifiers to service, and closes the normally closed set of contacts.
8.2.2 Troubleshooting
High voltage shutdown occurs when the output voltage exceeds the HVSD threshold. This can be caused
by a rectifier failure, the system equalize voltage exceeding the HVSD threshold, or temperature compensation
exceeding the HVSD threshold setting.
1.

Restart the rectifiers by resetting the HVSD RST button located on the ALU.

2.

Verify the output voltage of each rectifier in both float and equalize.

3.

Verify that the equalize voltage setting does not exceed the HVSD threshold setting.

4.

Verify the temperature compensation voltage setting. Ensure that Temp Comp does not exceed the
HVSD threshold setting when operating in cold temperatures.

8.3 High Voltage Alarm Description
8.3.1 Description
The High Voltage alarm (HV) is a minor alarm activated when the DC output voltage exceeds the HV
threshold setting. When the system voltage exceeds the HV setting value, the ALU sends the HV alarm signal,
lights the HV LED located on the ALU panel, and activates the HV alarm contact. The rectifiers remain on
line during this minor alarm condition. When the system voltage decreases below the threshold setting, the
ALU extinguishes the HV LED and deactivates the HV alarm contact.

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DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
8.3.2 Troubleshooting
The HV alarm is usually caused when the equalize voltage exceeds the HV threshold setting. Another
probable cause that the temperature compensation voltage exceeds the HV threshold during cold temperature
operation. During this alarm condition, the system continues to operate.

8.4 Low Voltage Alarm
8.4.1 Description
The Low Voltage alarm (LV) is a minor alarm activated when the DC output voltage decreases below the
LV threshold setting. When the system voltage decreases below the LV LED located on the ALU panel, and
activates the LV alarm contact. The rectifiers remain on line during this minor alarm condition. When the
system voltage increases above the threshold setting, the ALU extinguishes the LV LED and deactivates the LV
alarm contact.
8.4.2 Troubleshooting
The LV alarm condition occurs during a brownout condition or prior to a complete AC Fail condition
caused by commercial AC problem conditions.
Another probable cause is that the temperature compensation voltage decreases the float voltage below the
LV threshold during hot temperature operation. During this alarm condition, the system continues to operate.

8.5 Low Voltage Disconnect Alarm (System equipped with PDU)
8.5.1 Description
During an AC Fail condition, the rectifiers are shut down and the reserve batteries begin to discharge.
When the battery cells discharge below the LVD setting, the ALU lights the LVD LED on the ALU panel,
activates the LVDS OPEN alarm contact, and opens the LVDS contactor. When the AC recovers, the LVBD
recovers automatically. The ALU extinguishes the LVD LED and resets the normally closed set of alarm
contacts.
8.5.2 Troubleshooting
If the battery disconnect switch remains open after voltage is restored to the rectifiers, one of the following
is occurring:
1.

The ALU may be faulty. Swap out the ALU with a spare and verify voltage settings.

2.

The LVBD coil windings may be open. With a digital multimeter, check the LVBD coil windings.

8.6 Fuse/Circuit Breaker Fail Alarm (System equipped with PDU)
8.6.1 Description
If the DC load output fuse opens or battery switch trip off, the ALU sends the alarm condition, lights the
LED on the ALU panel, and activates the Fuse Fail alarm.
8.6.2 Troubleshooting
To troubleshoot the fuse/circuit breaker fail alarm condition, perform the following steps:
1.

Verify that the fuse/circuit breaker is the proper size (use 80% derating guide).

2.

Verify that the external fault that might cause fuse/circuit breaker tripping is removed.

3.

Replace the blown fuse with a fuse with the same rating or of the corrected value. In case of a circuit

8-2

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
breaker, turn it on. If necessary replace with the correct size fuse.
If the fuse/circuit breaker continues to trip, perform the following steps:
1.

Check the DC branch load to ensure tat the fuse/ circuit breaker is the correct size.

2.

If the branch load exceeds the fuse/circuit breaker rating, the device must be changed to a higher rating.

3.

Install a fuse/circuit breaker with a higher rating.

Warning: Ensure that the device rating does not exceed the branch load wire capacity. If the device
rating is higher than the branch load wire rating, the branch load wire must be changed to a
larger wire. Failure to protect the branch load wire may result in overheating and fire.

8.7 Alarm Unit Fail
8.7.1 Description
During an ALU fail condition, the ALU fail and status LEDs are extinguished, and all alarm contacts open.
During an ALU failure, the rectifiers status changes from equalize to float or remains in the float condition.
The LVBD does not open during an ALU failure.
8.7.2 Troubleshooting
To troubleshoot the ALU fail condition, perform the following steps:
1.

Check the input fuse located on the rear of the ALU. Replace if blown.

2.

Check the DC input connectors for proper connections.

3.

Replace with a spare and send the faulty unit to Delta for repair.

8.8 Rectifier Fail Alarm
(1)

If one rectifier fails, the MIN contacts open, and the MIN LED on the ALU lights. When two rectifiers
fail, the MAJ alarm contact is opened, and the MAJ LED lights.
Warning: Do not open the rectifier unit. There are no serviceable parts.

(2)

If you want to ignore the MAJ or MIN alarm when you pull out the rectifiers from the slots, just please
press the SMR RST button on the ALU.

(3)

If you insert the above rectifier back to the slot, then pull out after the “FL” LED on the SMR panel light
up. The system will alarm in the “MIN” mode.
That means if we repeat to pull out and insert in and pull out the rectifier, the condition described in item
(2) will be cleared.

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DELTA MCS-1800 3U Power Shelf
Installation, Operations and
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9 Maintenance
9.1 Cleaning and Maintenance
9.1.1 General
Special maintenance is not necessary for this system, unless the system is being operated in a severely
harsh environment (dusty environment). The front panels and the cover of the DC distribution cabinet were
treated with a special coating. Do not use organic cleanser or volatile solvent because corrosion damage
may occur. For periodic cleaning, brush the dust from the cover and panel. If necessary, use a gentle
cleanser or a lightly dampened lint free cloth to remove any dirt or smudges.
9.1.2 Periodic Maintenance
Periodic maintenance is not required for normal operation. If necessary, wipe dust from the front of
the power system using a lint free, soft cloth and gently wipe the front of the distribution module, the ALU,
and the rectifiers. If necessary, use a gentle detergent to clean.
Warning: Do not use a spray cleanser to clean the equipment. Using a spray cleanser directly on the
equipment can result in serious equipment damage.

9.2 Removing and Replacing a Rectifier Unit
9.2.1 Removing a Rectifier
Warning: Do not touch the DC output bus when pulling out the PSU module.
To remove a rectifier, perform the following steps.
1.

Switch off PSU module.

2.

Loosen the captive retaining screws located on the bottom of the front panel.

3.

Pull out the rectifier unit slowly from the shelf.

9.2.2 Replacing a Rectifier
To replace a rectifier, perform the following steps:
1.

Make sure the breaker on the front panel of PSU is switched off.

2.

Install the rectifier unit carefully. Place the rectifier on the shelf, ensuring that the rails are on the
track.

Warning: Do not force the module into the slot. If does not slide in and connect easily, remove and reset
the unit.
3.

Lock the rectifier into position by screwing in the captive retaining screws located at the bottom of
the rectifier.

4.

Switch on the PSU and check the AC ON LED lights on the front of the PSU on the front of the
rectifier. AC ON LED lights.

9-1

Delta MCS-1800 3U Power Shelf
Installation, Operations and
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10

Acronyms and Abbreviations

--- A --ALU
Amp
ANSI

Alarm Control Unit
Ampere
American National Standards Institute

--- B --BS
BTU

British Standard
British Thermal Unit

--- C --C
CB
CE
CISPR
CL
CUL

Centigrade
Circuit Breaker
European Community
International Special Committee on Radio Interference
Current Limit
Canadian Underwriters Laboratory

--- D ----- E --EMI
ESD

Electro-Magnetic Interference
Electrostatic Discharge

--- F --F
FCC
Ft.

Fahrenheit
Federal Communications Commission
Foot

--- G --GND

Ground

--- H --HL
HV
HVSD
Hz

High Line
High Voltage
High Voltage Shutdown
Hertz

--- I --IEC
IEEE
In.

International Electronics Commission
Institute of Electrical and Electronics Engineers
Inch

--- J ----- K --Kg.
KHz

Kilogram
Kilohertz

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Delta MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
KHz
KV
KW

Kilohertz
Kilovolt
Kilowatt

--- L --Lb.

Pound

LED

Light-Emitting Diode

LL

Low Line

LV

Low Voltage

LVD

Low Voltage Disconnect

LVBD

Low Voltage Battery Disconnect

LVDS

Low Voltage Disconnect Switch

--- M --M
Max.
MHz
Mm
Ms
MTBF
MV
mVrms

Meter
Maximum
Megahertz
Millimeter
Millisecond
Mean Time Between Failure
Millivolt
Millivolt root root mean square

--- N --NEMA
No.

National Electrical Manufacturers Association
Number

--- O ----- P --PF
PFC
PSU

Power Factor
Power Factor Correction
Power Supply Unit

--- Q --Qty.

Quantity

--- R --RFA
RFI
RH
RMA

Rectifier Failure Alarm
Radio Frequency Interference
Relative Humidity
Return Material Authorization

--- S ----- T ---

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Delta MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
TB
THD

Terminal Block
Total Harmonic Distortion

--- U --UL

Underwriters Laboratory

--- V --V
VAC
VDC

Volt
Volts AC
Volts DC

--- W --W

Watt

--- X ----- Y ----- Z ---

10-3

Delta MCS 1800 3U
Power Shelf

ATTACHMENT

DELTA ELECTRONICS, INC.

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

I+
I-

FL

O

F
OF

RF
A

AC

CL

ON

I-

I+

ON

AC

Power Supply Unit

ES 48/120-JAAxx、ES 24/200-JAAxx (-48V/+24VPower Shelf)

CL

Figure 1:

FL

O

F
OF

CL
RF
A

AC

CL

ON

I-

I+

ON

AC
FL

O

F
OF

CL
RF
A

AC

I-

I+

ON

ON

FL

O

F
OF

CL
RF
A

AC

CL
ON

AC

ON

Alarm Control Unit

AC

Power Shelf

CL

REV: 00

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DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

A-2

Alarm Relay Output
PDU Detect Control Signal Input

Current Signal Input

台達電子工業股份有限公司
交換式電源供應器

DC Output
REV: 00

EXT: Breaker Trip Signal I/P

ES 48/120-JAAxx 、 ES 24/200-JAAxx (DC Output Lug
Distribution)

DETAIL "A"

Figure 1-1:

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
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Figure 1-2:

REV: 00

ES 48/120-JAAxx 、 ES 24/200-JAAxx (Signal connection
Connectors for External Distribution Unit )

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DELTA MCS 1800 3U Power Shelf
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REV: 00

A-4

25

ALARM RELAY OUTPUT

1
13

ALAR M RELAY

14

ES 48/120-JAAxx、ES 24/200-JAAxx (Battery Temperature
and Alarm Relay Output Connectors)

BATTERY TEMPERATURE DETECT SIGNAL INPUT

Figure 1-3:

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

Figure 1-4:

REV: 00

ES 48/120-JAAxx (Shelf Wiring MCS 1800 Series Shelf)

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DELTA MCS 1800 3U Power Shelf
Installation, Operations and
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Figure 1-5:

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ES 24/200-JAAxx (Shelf Wiring Diagram)

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DELTA MCS 1800 3U Power Shelf
Installation, Operations and
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Figure 2:

REV: 00

ES 48/90-JBAxx (-48V Power Shelf With PDU)

A-7

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

Figure 2-1:

REV: 00

ES 48/90-JBAxx (DC Output Lug Distribution)

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DELTA MCS 1800 3U Power Shelf
Installation, Operations and
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Figure 2-2:

REV: 00

ES 48/90-JBAxx (Load Cable and Battery String
Connection Terminals)

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DELTA MCS 1800 3U Power Shelf
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ES 48/90-JBAxx (Battery Temperature and Alarm Relay
Output Connectors)

台達電子工業股份有限公司
交換式電源供應器

Figure 2-3:

REV: 00

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DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

Figure 2-4:

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ES 48/90-JBAxx (Battery and Load Breaker Distribution)

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DELTA MCS 1800 3U Power Shelf
Installation, Operations and
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Figure 2-5:

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ES 48/90-JBAxx (Shelf Wiring MCS 1800 Series Shelf)

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DELTA MCS 1800 3U Power Shelf
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I+
I-

F
OF

AC

CL
RF

A
ON

I-

I+

ON

AC

Power Supply Unit

ES 48/90-JFAxx (-48V Power Shelf With PDU)

CL
FL
O

Figure 3:

F
OF

CL
FL
O
A
ON

I-

I+

ON

AC

F
OF

CL
FL
O

AC

CL
RF

A
ON

Alarm Control Unit

Power Shelf

ON

AC

A-13

Power Distribution Unit

AC

CL
RF

REV: 00

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

REV: 00

A-14

Alarm Relay Output

DETAIL "A"

ES 48/90-JFAxx (Alarm Relay Output connectors)

台達電子工業股份有限公司
交換式電源供應器

Figure 3-1:

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

ES 48/90-JFAxx (AC Input Connector)

AC INPUT TERMINAL
(USE 1015 6AWG~10AWG)

Figure 3-2:

REV: 00

A-15

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

ES 48/90-JFAxx (Battery Temperature)

BATTERY TEMPERATURE DETECT SIGNAL INPUT

Figure 3-3:

REV: 00

A-16

REV: 00

A-17
LOAD -48V TERMINAL
(USE 1015 4AWG~8AWG)

BATT. -48V TERMINAL
(USE 1015 4AWG~8AWG)

Figure 3-4

BATT+0V TERMINAL
(USE 1015 4AWG~8AWG)

LOAD +0V TERMINAL
(USE 1015 4AWG~8AWG)

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

ES 48/90-JFAxx (DC Output Lug Distribution)

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

Figure 3-5:

REV: 00

ES 48/90-JFAxx (Shelf Wiring MCS 1800 Series Shelf)

A-18

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

Figure 4:

Alarm Control Unit

System Voltage
Measurment

System Current
Measurement

Manual Float/
Equalizing Button
High Voltage Shut
Down Reset
SMR RFA
Warning Reset

Alarm/Status
Indicator LEDS

RS232 Interface

LAN Interface

REV: 00

A-20

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

Figure 4-1:

Alarm Control Unit
System Voltage
Measurment

System Current
Measurement

Manual Float/
Equalizing Button
High Voltage Shut
Down Reset
SMR RFA
Warning Reset

Alarm/Status
Indicator LEDS

REV: 00

RS232 Interface

A-21

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

Figure 5:

REV: 00

Power Supply Unit

A-22

REV: 00

D/I

A/D

A-23

USART

SSP

PWM

D/O

RS232 Communication
WEB Communication

EEPROM

Voltage Output

Current Limit Signal

Alarm Output Relay
and LED Indicator
LVDS Contact Control

Figure 6:

SMR Fail Alarm Detection
SMR Current Limit
Detection
Temp. Sensor Lock Off
Breaker or Fuse Fail
FL/EQU Exchange Signal
SMR Fail Reset
HVSD Alarm Reset

SMR Current (1-5)
Load Current (1)
Batt. Temperature
DC Voltage
AC voltage
Current

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

ALU Block Diagram

REV: 00

FG

A-24

I/P Bridge
PFC Boost
Converter

Driver C.K.T.

&

Aux. Power

PFC
Controller

Input Fuse
Inrush C.K.T.
EMI Filter

C

Fan.
Connector
C.K.T.

DC/DC
Output
Controller & Fuse
Protection Filter

Full
BPhase
id
Shift
DC/DC
Rectifier

Output

Vo-

Vo+

Figure 7:

N

L

DELTA MCS 1800 3U Power Shelf
Installation, Operations and
Maintenance Manual

SMR Block Diagram

TAIPEI OFFICE
186 RUEY KUANG ROAD, NEIHU
TAIPEI 114, TAIWAN, R.O.C.
TEL : 886-2-87972088
FAX : 886-2-87972120
CHUNGLI PLANT
3 TUNG YUAN ROAD,
CHUNGLI INDUSTRIAL ZONE,
CHUNGLI, TAOYUAN HSIEN 320, TAIWAN, R.O.C.
TEL. 886-3-4526107
FAX. 886-3-4527314

P/N: MCS-1800 Power Shelf



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