B30 01
User Manual: B30
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Bus Protection
gDigital Energy
• High speed differential protection algorithm for enhanced
with Subcycle trip times of 0.75 power cycle
• Complete IEC 61850 Process Bus solution providing resource
optimization and minimizing total P&C lifecycle costs
• Superior CT saturation detector capable of detecting CT
saturation even with only 2 msec of saturation free current
for enhanced through fault stability.
• Ambient temperature monitoring with alarming when outside
temperature exceeds upper thresholds
• Cost effective alternative to high impedance schemes
• Advanced automation capabilities for providing customized
protection and control solutions
• High-end fault and disturbance recording, including internal
relay operating signals provided thus eliminating the need for
redundant recording devices
• Application flexibility with multiple I/O options and
programmable logic (FlexLogic™)
• Robust network security enabling Critical Infrastructure
Protection through user command logging, and dual
permission access control
• Simplified system integration with communications
supporting serial and Ethernet interfaces and multiple
protocols
• Embedded IEC61850 Protocol with no external
communications hardware required
• Re-configurable simple bus applications, up to 6 feeders and
2 differential zones with breaker failure
• Integrated bus protection and metering for HV and EHV
substations
• Isolator monitoring
• CT trouble monitoring, VT supervision
• Metering - current, voltage, frequency
• Oscillography - 64 samples/cycle, up to 64 records
• Event Recorder - 1024 time tagged events, with 0.5 ms scan
of digital inputs
Monitoring and Metering
Protection and Control
• Differential protection with restrained and
unrestrained function
• Fast and reliable CT saturation detection
• Breaker failure protection
• External Check-zone
• CT ratio mismatch compensation
• Dynamic Bus Replica
• Thermal overload and Back-up phase, ground
and neutral time and instantaneous overcurrent
protection
• Undervoltage function for supervision purposes
Communications
• Networking options - Ethernet-fiber (optional redundancy),
RS422, RS485, G.703, C37.94
• Multiple protocols - IEC61850, DNP 3.0 Level 2, Modbus RTU,
Modbus TCP/IP, IEC 60870-5-104
• Direct I/O - secure high-speed exchange of binary data
between URs
FEATURES
FEATURES
APPLICATIONS
KEY BENEFITS
EnerVistaTM Software
• Graphical Logic Designer and Logic Monitor to simplify
designing and testing procedures
• Document and software archiving toolset to ensure
reference material and device utilities are up-to-date
• EnerVistaTM Integrator providing easy integration of data in
the B30 into new or existing monitoring and control systems
• Robust communications with up to 8 HardFiber Bricks
• Seamless integration with existing B30 functions
• Redundant architecture for dependability and security
IEC 61850 Process Bus Interface
B30
Multilin™
BUS DIFFERENTIAL SYSTEM
Cost effective low impedance biased bus
differential protection for up to six feeders
270270
B30
Bus Differential System
Bus Protection
www.GEDigitalEnergy.com
Protection and Control
The B30 Bus Differential System provides,
secure, subcycle low impedance bus
protection for a single busbar with up
to six feeders. The B30 is ideally suited
in applications where high impedance
schemes were typically used. Overall
system costs can be reduced with the
B30, since there is no need for dedicated,
or interposing, CTs. The B30 comes with
advanced features, such as breaker
failure, CT trouble detection, under-
voltage supervision, and dynamic bus
replica. With its extreme flexibility, which
includes a CT ratio mismatch of up to 32:1
between terminals, the B30 is the ideal
solution in a wide variety of bus differential
applications.
Part of the Universal Relay family, the B30
comes with a variety of versatile features
truly integrating protection, monitoring,
metering, communication and control in
one easy-to-use device. The Universal Relay
family offers higher degree of modularity
in its design and functionality providing
superior performance in protection and
control meeting the toughest requirements
of the marketplace.
Bus Differential Protection
The B30 is based on a centralized phase-
segregated architecture that does not rely
on extensive communications between
IEDs, an approach that increases overall
reliability.
The B30 provides fast and secure low
impedance bus protection with sub-cycle
tripping times averaging 0.75 cycles. The
primary protection is based on differential
and directional protection principles,
and uses a dedicated CT saturation
mechanism for additional through-fault
stability. This mechanism is capable of
detecting saturation of CTs as quickly as
two milliseconds into an external fault.
The overall system costs can be reduced
with the B30 since there is no need for
dedicated, or interposing, external CTs.
The two differential zones can handle two
small buses, split bus, or single bus bar
with supervision zone.
Dynamic Bus Replica
The B30 provides a dynamic bus replica
for each zone of differential protection.
Built-in programmable logic removes the
need for external auxiliary relays, and
provides the ability to include or exclude
currents dynamically from the differential
zones. This allows the B30 to follow the
actual busbar configuration with no
external switching of CT circuits required.
The B30 also avoids blind and overtripping
spots in simple bus configurations.
Reliability is increased and costs reduced
by eliminating auxiliary relays that would
otherwise be used for switching physical
currents. The ability to monitor auxiliary
switches and a contact discrepancy alarm
also provides increased security.
Breaker Failure Protection
Three-pole breaker failure (BF) protection
is available. The B30 system provides for
up to 6 BF elements that can respond to
currents and/or auxiliary contacts. The
current supervision provides fast reset
B30 Bus Dierential System
Zone 1 Zone 2
27P
49
59X
59N
51N50N 50G 51G
51P
50/87
Restraint Current
Metering FlexElements
VT input
(optional)
TM
Current Directional Comparison
CT Saturation Detection
CT Trouble (50/74)
87B
51N50N 50G 51G
51P
51N50N 50G 51G
51P
51N50N 50G 51G
51P
51N50N 50G 51G
51P
51N50N 50G 51G
51P
50P
50P
50P
50P
50P
50P
Functional Block Diagram
Device
Number Function
27P Phase Undervoltage
49 Thermal overload
50G Ground Instantaneous Overcurrent
50N Neutral Instantaneous Overcurrent
50P Phase Instantaneous Overcurrent
50/74 CT Trouble
50/87 Unrestrained Bus Differential
51G Ground Time Overcurrent
51N Neutral Time Overcurrent
51P Phase Time Overcurrent
59N Neutral Overvoltage
59X Auxiliary Overvoltage
87B Restrained Bus Differential
ANSI Device Numbers & Functions
B30 - Protection, Metering, Monitoring and Control
The B30 is the single point for protection, control, metering, and monitoring in one integrated device that can
easily be connected directly into DCS or SCADA monitoring and control systems like Viewpoint Monitoring.
271271
B30
Bus Differential System
Bus Protection
www.GEDigitalEnergy.com
time and separate settings for low-set
and hi-set are implemented. The BF can
be initiated internally from the busbar
protection or externally via input contacts
or communications.
Backup Protection
Backup protection is available with
instantaneous and time overcurrent
functions for each current input of the
B30 system. For supervision purposes, an
undervoltage function is also provided for
each voltage input of the B30 system.
• IOC Functions: Two separate IOC
functions are available for trip
supervision or other user-configurable
applications
• TOC: One TOC function is incorporated
for each CT input of the relay. Up
to 6 TOCs are available for backup
protection. The TOC function can use
standard or user- programmable
curves
• Voltage Supervision: up to two
undervoltage elements are available
per each VT input of the relay. This
function may be used to supervise the
current-based protection functions for
extra security
External Check-Zone
An optional external check-zone can
be used to prevent operation of the
differential protection due to CT troubles. If
one B30 current input is left unused and an
alternative set of current signals is available
from independent CTs, the currents can
be combined externally and connected
to the relay. Two phase overcurrent
elements are available to check the level
of this independently formed differential
current to supervise the main differential
protection.
IEC 61850 Process Bus
The IEC 61850 Process Bus module is
designed to interface with the GE Multilin
HardFiber System, allowing bi-directional
IEC 61850 fiber optic communications.
The HardFiber System is designed to
integrate seamlessly with the existing
Universal Relay applications, including
protection functions, FlexLogic, metering
and communications.
The GE Multilin HardFiber System offers
the following benefits:
• Communicates using open standard
IEC 61850 messaging
• Drastically reduces P&C design,
installation and testing labor by
eliminating individual copper
terminations
• Integrates with existing B30’s by
replacing traditional CT/VT inputs with
IEC 61850 Process Bus module
• No new Cyber Security concerns
Built-in Advanced Disturbance Recording
The bus differential element picks up due to heavy CT saturation
The CT Saturation flag is set safely before the pickup flag
The directional flag is not set
The element does not maloperate
Despite heavy CT saturation the external
fault is seen in the opposite direction The bus differential element picks up
The CT Saturation flag is not set - no directional
decision required
The directional flag is set
The element operates in 10 ms
All the fault currents are
seen in one direction
The built-in advanced disturbance recording function allows users to view the COMTRADE files and trouble shoot bus fault. The internal operation of the
B30 elements, logic, and outputs can be monitored in real time to simplify commissioning and troubleshooting procedures. Two cases are shown here:
External Fault:
Even with heavy CT saturation and with only 1 msec of saturation free current B30 is stable for through faults. See the Directional Comparison element
output, which adds additional security to the bus differential function
Internal Fault:
For internal fault the CT saturation flag is not set and the directional element output is safely ignored resulting in an operating time of less than 10 msec.
272272
B30
Bus Differential System
Bus Protection
www.GEDigitalEnergy.com
Visit the HardFiber System product page
on the GE Multilin web site for more
details.
Advanced Automation
The B30 incorporates advanced automation
features including powerful FlexLogic™
programmable logic, communication, and
SCADA capabilities that far surpass what
is found in the average bus relay. The B30
integrates seamlessly with other UR relays
for complete system protection.
FlexLogic™
FlexLogic™ is the powerful UR-platform
programming logic engine that provides
the ability of creating customized
protection and control schemes thereby
minimizing the need, and the associated
costs, of auxiliary components and wiring.
Using FlexLogic™, the B30 can be
programmed to provide required tripping
logic along with custom scheme logic for
breaker control, transfer tripping schemes
for remote breakers and dynamic setting
group changes.
Scalable Hardware
The B30 is available with a multitude of I/O
configurations to suit the most demanding
application needs. The expandable modular
design allows for easy configuration and
future upgrades.
• Multiple CT/VT configurations allow
for implementation of many different
schemes
• Flexible, modular I/O covering a broad
range of input signals and tripping
schemes
• Types of digital outputs include trip-
rated Form-A and Solid State Relay
(SSR) mechanically latching, and
Form-C outputs
• Form-A and SSR outputs available with
optional circuit continuity monitoring
and current detection to verify
continuity and health of the associated
circuitry
• Mechanically latching outputs
can be used to develop secure
interlocking applications and replace
electromechanical lockout relays
• RTDs and DCmA inputs are available to
monitor equipment parameters such as
temperature & pressure
Monitoring and Metering
The B30 includes high accuracy metering
and recording for all AC signals. Voltage,
current, and power metering are built into
the relay as a standard feature. Current
and voltage parameters are available
as total RMS magnitude, and as
fundamental frequency magnitude and
angle.
Fault and Disturbance Recording
The advanced disturbance and event
recording features within the B30 can
significantly reduce the time needed for
postmortem analysis of power system
events and creation of regulatory reports.
Recording functions include:
• Sequence of Event (SOE)
- 1024 time stamped events
• Oscillography,
- 64 digital & up to 40 Analog channels
• Data Logger, disturbance recording –
16 channels up to 1 sample / cycle /
channel
• Fault Reports
- Powerful summary report of pre-fault
and fault values
The very high sampling rate and large
amount of storage space available for
data recording in the B30 can eliminate
the need for installing costly standalone
recording equipment.
Advanced Device Health
Diagnostics
The B30 performs comprehensive
device health diagnostic tests during
startup and continuously at runtime to
test its own major functions and critical
hardware. These diagnostic tests monitor
for conditions that could impact security
and availability of protection, and present
device status via SCADA communications
and front panel display. Providing
continuous monitoring and early detection
of possible issues helps improve system
uptime.
• Comprehensive device health
diagnostic performed during startup
• Monitors the CT/VT input circuitry to
validate the integrity of all signals
Custom Programmable Logic Designer
The internal operation of the B30 elements, logic, and outputs can be monitored in real time to
simplify commissioning and troubleshooting procedures
273273
B30
Bus Differential System
Bus Protection
www.GEDigitalEnergy.com
Communications
The B30 provides for secure remote data
and engineering access, making it easy
and flexible to use and integrate into
new and existing infrastructures. Fiber
optic Ethernet provides high-bandwidth
communications allowing for low-latency
controls and high-speed file transfers of
relay fault and event record information.
The available redundant Ethernet option
provides the means of creating fault
tolerant communication architectures in
an easy, cost-effective manner.
The B30 supports the most popular industry
standard protocols enabling easy, direct
integration into DCS and SCADA systems.
• IEC61850
• DNP 3.0
• IEC60870-5-104
• Modbus RTU, Modbus TCP/IP
Interoperability with Embedded
IEC61850
The B30 with integrated IEC61850 can
be used to lower costs associated with
bus protection, control, and automation.
GE Multilin’s leadership in IEC61850
comes from thousands of installed
devices and follows on Multilin’s
extensive development experience with
UCA 2.0.
• Replace expensive copper wiring
between devices with direct transfer of
data using GOOSE messaging
• Configure systems based on IEC61850
and also monitor and troubleshoot
them in real-time with EnerVistaTM
Viewpoint Engineer
• Integrate GE Multilin IEDs and generic
IEC61850-compliant devices seamlessly
in EnerVistaTM Viewpoint Monitoring
Direct I/O Messaging
Direct I/O allows for sharing of high-speed
digital information between multiple UR
relays via direct back-to-back connections
or multiplexed through a standard DS0
multiplexer channel bank. Regardless of
the connection method, Direct I/O provides
continuous real-time channel monitoring
that supplies diagnostics information on
channel health.
Direct I/O provides superior relay-to-relay
communications that can be used in
advanced interlocking, generation rejection
and other special protection schemes.
• Communication with up to 16 UR relays
in single or redundant rings rather
than strictly limited to simplistic point-
to-point configurations between two
devices
• Connect to standard DS0 channel
banks through standard RS422, G.703
or IEEE C37.94 interfaces or via direct
fiber optic connections
• No external or handheld tester
required to provide channel diagnostic
information
Multi-Language
The B30 supports English, French, Russian,
Chinese and Turkish Languages on the
front panel, EnerVista setup software, and
product manual. Easily switch between
English and an additional language on
the local displays without uploading new
firmware.
EnerVistaTM Software
The EnerVista™ Suite is an industry-leading
set of software programs that simplifies
every aspect of using the B30 relay. The
EnerVistaTM suite provides all the tools
to monitor the status of the protected
asset, maintain the relay, and integrate
information measured by the B30 into
DCS or SCADA monitoring systems.
Convenient COMTRADE and Sequence
of Events viewers are an integral part
of the UR Setup software included with
every UR relay, to carry out postmortem
event analysis to ensure proper protection
system operation.
EnerVista™ Launchpad
EnerVista™ Launchpad is a powerful
software package that provides users with
all of the setup and support tools needed
for configuring and maintaining GE Multilin
products. The setup software within
Launchpad allows configuring devices
in real-time by communicating using
serial, Ethernet, or modem connections, or
offline by creating setting files to be sent to
devices at a later time.
Included in Launchpad is a document
archiving and management system
that ensures critical documentation is
up-to-date and available when needed.
Documents made available include:
• Manuals
• Application Notes
• Guideform Specifications
• Brochures
• Wiring Diagrams
• FAQ’s
• Service Bulletins
Monitor the status of your substation using the easy to use Viewpoint Monitoring HMI
Substation Monitoring
274274
B30
Bus Differential System
Bus Protection
www.GEDigitalEnergy.com
Viewpoint Monitoring
Viewpoint Monitoring is a simple-to-use
and full-featured monitoring and data
recording software package for small
systems. Viewpoint Monitoring provides a
complete HMI package with the following
functionality:
• Plug-&-Play Device Monitoring
• System Single-Line Monitoring & Control
• Annunciator Alarm Screens
• Trending Reports
• Automatic Event Retrieval
• Automatic Waveform Retrieval
Viewpoint Engineer
Viewpoint Engineer is a set of powerful
tools that will allow the configuration
and testing of UR relays at a system level
in an easy-to-use graphical drag-and-
drop environment. Viewpoint Engineer
provides the following configuration and
commissioning utilities:
• Graphical Logic Designer
• Graphical System Designer
• Graphical Logic Monitor
• Graphical System Monitor
Record the operation of the internal B30 elements and external connected devices
with 1ms time-stamped accuracy
Simplifying Commissioning and Testing
Create B30 Setting File Templates to ensure critical settings are not altered
LED Indicators
Multi-Language Display
• English
• Russian
• French
• Chinese
• Turkish
User Programmable Pushbuttons
Viewpoint Maintenance
Viewpoint Maintenance provides tools that
will create reports on the operating status
of the relay, simplify the steps to download
fault and event data, and reduce the work
required for cyber-security compliance
audits. Tools available in Viewpoint
Maintenance include:
• Settings Security Audit Report
• Device Health Report
• Single Click Fault Data Retrieval
EnerVista™ Integrator
EnerVistaTM Integrator is a toolkit that
allows seamless integration of GE Multilin
devices into new or existing automation
systems. Included in EnerVista Integrator
is:
• OPC/DDE Server
• GE Multilin Drivers
• Automatic Event Retrieval
• Automatic Waveform Retrieval
User Interface
The B30 front panel provides extensive
local HMI capabilities. The local display
is used for monitoring, status messaging,
fault diagnosis, and device configuration.
User configurable messages that combine
text with live data, can be displayed when
user-defined conditions are met.
275275
B30
Bus Differential System
Bus Protection
www.GEDigitalEnergy.com
Typical Wiring
B30-H00-HCL-F8H-H6H-L8H-N6A-S8H-U6H
F3
F5
F4
F6
DC
Dry
B30
1
Power
Supply
9
CPU
JU MX LW KV BHT D
NG FPS R
8
CT
6
Inputs/
outputs
8
CT
*
6
Inputs/
outputs
*
8
CT
*
6
Inputs/
outputs
*
F1
F2
ABC
Digital Energy
Multilin
B30-H00-HCL-F8H-L8H-N6A-S8H-U6H
(Rear View)
CRITICAL
FAILURE
OUTPUT
CONTROL
POWER
HI
LO
1
FILTER
SURGE
B3a
B1b
B8a
B6b
B8b
B6a
B3b
B1a
B2b
B5b
SURGE
N6a
N8a
N5b
N7b
N8b
N5a
N7a
N6c
N8c
N5c
N7c
6A
N1
N2
N3
N4
N1a
N2b
N1c
N1b
N2c
N2a
N4a
N4c
N3b
N3a
N4b
N3c
I
V
I
V
6H
H8a
H7b
H7a
H8c
H7c
H1b
H2b
H3b
H4b
H5b
H6b
H1a
H2a
H3a
H4a
H5a
H6a
H1c
H2c
H3c
H4c
H5c
H6c
SURGE
H8b
H1
H5
H2
H6
H3
H4
I
V
I
V
I
V
I
V
I
V
I
V
Wet
6H
U8a
U7b
U7a
U8c
U7c
U1b
U2b
U3b
U4b
U5b
U6b
U1a
U2a
U3a
U4a
U5a
U6a
U1c
U2c
U3c
U4c
U5c
U6c
SURGE
U8b
U1
U5
U2
U6
U3
U4
I
V
I
V
I
V
I
V
I
V
I
V
Minimum
PROVIDED
com
10BaseFL
10BaseFL
10BaseT
D1a
D2a
D4b
D3a
D4a IRIG-B
Input
IRIG-B
Output
COM
1
RS485
ALTERNATE
NORMAL
Tx2
Rx2
Tx1
Rx1
BNC
BNC
Fibre
Optic
*
Remote
Device
Shielded
Co-axial
Co-axial
F7c
F5c
F5a
F5b
F7b
F3c
F1c
F6a
F2b
F7a
F2a
F6b
F6c
F2c
F1a
F1b
F3a
F3b
IA
IA
IC
IC
IB
IB
IA5
IA5
IC5
IC5
IB5
IB5
IA1
IA1
IC1
IC1
IB1
IB1
7c
5c
5a
5b
7b
3c
1c
6a
2b
7a
2a
6b
6c
2c
1a
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
1b
3a
3b
IA
IA
IC
IC
IB
IB
IA5
IA5
IC5
IC5
IB5
IB5
IA1
IA1
IC1
IC1
IB1
IB1
L7c
L5c
L5a
L5b
L7b
L3c
L1c
L6a
L2b
L7a
L2a
L6b
L6c
L2c
L1a
L1b
L3a
L3b
IA
IA
IC
IC
IB
IB
IA5
IA5
IC5
IC5
IB5
IB5
IA1
IA1
IC1
IC1
IB1
IB1
276276
B30
Bus Differential System
Bus Protection
www.GEDigitalEnergy.com
Ordering Note:
1 - For vertical mounting order codes, please visit our online store or review the B30 instruction manual
2 - To view the latest options available for theB30, or to order the UR Classic Front Panel, please visit our online store for more details.
110927-v7
Ordering
• UR Applications I Learning CD TRCD-URA1-C-S-1
• Multilink Ethernet Switch ML2400-F-HI-HI-A2-A2-A6-G1
• Viewpoint Engineer VPE-1
• Viewpoint Maintenance VPM-1
• Viewpoint Monitoring IEC61850 VP-1-61850
Accessories for the B30
• View Guideform specifications
• Download the instruction manual
• Review applications notes and support documents
• Buy a B30 online
• View the UR Family brochure
Visit www.GEMultilin.com/B30 to:
B30 - * ** - H * * - F ** - H ** - L ** - N ** - S ** - U ** - W ** For Full Sized Horizontal Mount
Base Unit B30 Base Unit
CPU E RS485 + RS485 (IEC61850 option not available)
G RS485 + 10BaseF
H RS485 + Redundant 10BaseF
J RS485 + Multi-mode ST 100BaseFX
K RS485 + Multi-mode ST Redundant 100BaseFX
N RS485 + 10/100 BaseT
Software Options 00 No Software Options
03 IEC61850
Mount/Coating H Horizontal (19" rack)
A Horizontal (19" rack) - Harsh Chemical Environment Option
User Interface K Enhanced English Front Panel
L Enhanced English Front Panel with User-Programmable Pushbuttons
M Enhanced French Front Panel
N Enhanced French Front Panel with User-Programmable Pushbuttons
Q Enhanced Russian Front Panel
T Enhanced Russian Front Panel with User-Programmable Pushbuttons
U Enhanced Chinese Front Panel
V Enhanced Chinese Front Panel with User-Programmable Pushbuttons
C Basic Front Panel with English display
W Enhanced Turkish Front Panel
Y Enhanced Turkish Front Panel with User-Programmable Pushbuttons
Power Supply H 125 / 250 V AC/DC
H RH 125/250 V AC/DC with redundant 125/250 V AC/DC power supply
L 24 - 48 V (DC only)
CT/VT DSP 8L 8L 8L Standard 4CT/4VT w/ enhanced diagnostics
8M 8M 8M Sensitive Ground 4CT/4VT w/ enhanced diagnostics
8N 8N 8N Standard 8CT w/ enhanced diagnostics
8R 8R 8R Sensitive Ground 8CT w/ enhanced diagnostics
IEC 61850 Process Bus 81 8 Port IEC 61850 Process Bus Module
Digital I/O XX XX XX No module
4A 4A 4A 4 Solid State (No Monitoring) MOSFET Outputs
4C 4C 4C 4 Solid State (Current w/opt Voltage) MOSFET Outputs
4D 4D 4D 16 Digital Inputs with Auto-Burnish
4L 4L 4L 14 Form-A (No Monitoring) Latchable Outputs
67 67 67 8 Form-A (No Monitoring) Outputs
6C 6C 6C 8 Form-C Outputs
6D 6D 6D 16 Digital Inputs
6E 6E 6E 4 Form-C Outputs, 8 Digital Inputs
6F 6F 6F 8 Fast Form-C Outputs
6K 6K 6K 4 Form-C & 4 Fast Form-C Outputs
6L 6L 6L 2 Form-A (Current w/ opt Voltage) & 2 Form-C Outputs, 8 Digital Inputs
6M 6M 6M 2 Form-A (Current w/ opt Voltage) & 4 Form-C Outputs, 4 Digital Inputs
6N 6N 6N 4 Form-A (Current w/ opt Voltage) Outputs, 8 Digital Inputs
6P 6P 6P 6 Form-A (Current w/ opt Voltage) Outputs, 4 Digital Inputs
6R 6R 6R 2 Form-A (No Monitoring) & 2 Form-C Outputs, 8 Digital Inputs
6S 6S 6S 2 Form-A (No Monitoring) & 4 Form-C Outputs, 4 Digital Inputs
6T 6T 6T 4 Form-A (No Monitoring) Outputs, 8 Digital Inputs
6U 6U 6U 6 Form-A (No Monitoring) Outputs, 4 Digital
6V 6V 6V 2 Form-A (Cur w/ opt Volt) 1 Form-C Output, 2 Latching Outputs, 8 Digital Inputs
Transducer I/O 5A 5A 5A 4 dcmA Inputs, 4 dcmA Outputs
5F 5F 5F 8 dcmA Inputs
Inter-Relay Communications 2B C37.94SM, 1300nm single-mode, ELED, 2 channel single-mode
7A 820 nm, multi-mode, LED, 1 Channel
7B 1300 nm, multi-mode, LED, 1 Channel
7C 1300 nm, single-mode, ELED, 1 Channel
7H 820 nm, multi-mode, LED, 2 Channels
7I 1300 nm, multi-mode, LED, 2 Channels
7J 1300 nm, single-mode, ELED, 2 Channels
7S G.703, 2 Channels
7W RS422, 2 Channels
77 IEEE C37.94, 820 nm, multimode, LED, 2 Channel
