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DET-136A
POWER LEADER™
Modbus® Concentrator
Product Overview
GE’s recent introduction of the POWER LEADER
Modbus Concentrator brings a new level of
performance and compatibility to users of GE’s
POWER LEADER communication network (commnet)
family of power management devices. Used in
conjunction with GE’s Power Management Control
System 5.0 (PMCS) software, the Modbus Concentrator
allows you to integrate your existing base of commnet
devices into the faster Modbus Remote Terminal Unit
(RTU) based PMCS network, improving overall system
performance while retaining the full functionality of
each commnet device.
Modbus RTU is an industry-standard communications
protocol that operates on an RS485 network. The
Modbus RTU protocol is widely supported for
supervisory control and data acquisition (SCADA)
systems, building management systems (BMS) and
distributed control systems (DCS). Industry leaders
such as Multilin, Power Measurements Limited, and GE
Fanuc produce Modbus RTU-compatible devices and
programmable logic controllers.
Modbus’ open architecture provides a high level of
flexibility while reducing the risks associated with
proprietary communications protocols. Key benefits of
the Modbus RTU protocol include:
• Devices and systems can be upgraded easily.
• A wide range of compatible devices from a
variety of manufacturers is supported.
• Communications are extremely flexible, both
upstream (to DCS, SCADA and BMS systems)
and downstream (to meters and trip units).
GE’s Power Management Control System 5.0 is a
powerful yet easy-to-use software package. It provides
communications and control functions for Modbus
RTU-compatible devices and (via the Modbus
Concentrator) commnet-based devices (such as the
POWER LEADER Meter or MicroVersaTrip trip unit).
The Concentrator polls data from up to 32 commnet
devices and communicates this data with PMCS. PMCS
may also communicate with other Modbus-native
devices such as the GE Fanuc 90/70 and 90/30
Programmable Logic Controllers, and Electronic Power
Meter (EPM) 3710/3720 waveform capture meters.
For current POWER LEADER commnet device users,
the POWER LEADER Modbus Concentrator provides a
modular and cost-effective way to meet future power
management needs by offering a link from commnet to
the higher speed Modbus network.
Upgrading an existing commnet network with POWER
LEADER Modbus Concentrators and PMCS has two
important benefits. First, your network may benefit
from increased overall performance, because the
Modbus Concentrator provides the higher speed of
Modbus communications. Second, PMCS is compatible
with many Modbus devices. As your needs change and
grow, PMCS supports a wide array of devices to meet
those needs, while maintaining compatibility of your
commnet devices through the Modbus Concentrator.
Conversely, if you are a user of PMCS equipped with
Modbus devices who wishes to use commnet devices,
you may add such devices to your network via the
Modbus Concentrator. Up to 215 commnet devices may
be attached (via multiple Modbus Concentrators) to a
single Modbus RTU network, allowing you to build a
power management system with maximum
functionality and flexibility.
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Standard Features
• One-piece steel case construction
– Simple installation (no cutouts)
• Ease of operation
– Four-character alphanumeric high-contrast LED
display
– Simple four-button keypad
– All setup done via faceplate keypad and display; no
confusing DIP switches
– Quick automatic setup capability
Product Specifications
Catalog Number
Description Catalog Number
POWER LEADER
Modbus Concentrator
Communications
• POWER LEADER Eight individual segments
commnet supporting up to
four devices per segment
• Modbus RTU One RS485 input port,
One RS485 output port
(1200 baud, 2400 baud,
4800 baud, 9600 baud,
and 19.2 Kbaud)
Power Requirements
• Control power 85 Vac – 265 Vac
100 Vdc – 250 Vdc
PLZOOMG01
• Communications
– Communicates on POWER LEADER commnet
communications protocol
– Communicates on Modbus RTU communications
protocol
– Each Modbus Concentrator supports up to 32
commnet devices (maximum 215 Commnet
devices per RS485 network possible with multiple
Concentrators)
Standards
• UL listed 508 & 840
• CSA certified C22.2 No. 14
Environment
• Operating temperature range –0° to +70° C
• Storage temperature range –20° to +80° C
• Relative humidity 5% to 95%
noncondensing
• Vibration response and IEC 255-21-1
endurance Severity Class 1
• Fast transient surge ANSI C37.90.1
• Radiated EMI withstand ANSI C37.90.2
capability
• Electrostatic discharge IEC 801-2
Severity Class 4
Supported POWER LEADER commnet Devices
Meters
• POWER LEADER Meter
• POWER LEADER Electronic Power Meter
Protection and Control Devices
• Spectra RMS™ Electronic Control Module
• POWER LEADER MDP200 Overcurrent Relay
Other Devices
• POWER LEADER Repeater
• POWER LEADER Junction Box
Trip Units
• MicroVersaTrip for Spectra Molded Case circuit
breakers (RMS6)
• MicroVersaTrip for Power Break and Type AKR
circuit breakers (RMS9C)
• MicroVersaTrip for Power Break II circuit breakers
(RMS9D)
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Outline Drawings TEST TEST
0.250 i n.
0.64 in.
3.466 in. 2.520 in.
g
POWER LEADER
Modbus® Concentrator
Contr ol Power
85Vac- 265Vac
100Vdc- 250Vd c
6.000 in.
2.312 in.
5.904 in.
2.312 in.
10.500 in.
10.000 in.
9.312 in.
+ - S + - S + - S + - S
Segment Segment Segment Segment
A B C D
Commnet Connecti ons
ST ATUS
LE Ds
Commnet Connecti ons
Segment Segment Segment Segment
E F G H
+ - S + - S + - S + - S
+ - S + - S
RS-485 In /Out
DISPLAY
s t
Sel ect
0.213 dia.
0.250 dia.
Enter
0.594 in.
Groundi ng
Scr ew
3.466 in. 2.520 in.
3.350 in. 3.025 in. 2.375 in.
Front View
Mount ing Surface
3.400 i n.
0.640 i n.
Groundi ng
2.137 in.
Scr ew
6.000 i n.
Side View
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Guide Form Specifications hidden
The microprocessor-based multifunction device shall
provide the functions listed below.
Communications
The device shall be capable of communicating on both
the POWER LEADER commnet and Modbus RTU
communication protocols. It shall communicate all
metering and setup information polled from connected
POWER LEADER commnet devices to a host PC
equipped with Power Management Control System 5.0
software. This shall be a multitasking system, providing
event logging, alarm and event indication, energy
trending, and the collection of information on a
scheduled basis. The device shall also be capable of
communicating setup and control commands from the
host computer to the attached commnet devices.
Inputs/Outputs
The device shall accept input from up to eight POWER
LEADER commnet segments. Each commnet segment
shall support up to four POWER LEADER commnet
devices (not including POWER LEADER Repeaters
and Junction/Outlet Boxes).
Modbus net wor k connect s RS485 native devi ces
Hos t
The device shall provide RS485 input and output ports
with adjustable baud rate (1200, 2400, 4800 and 9600
baud, and 19.2 Kbaud) for communications on a
Modbus RTU protocol network.
The device shall have a four-character alphanumeric
high-contrast LED display and a four-key keypad on its
faceplate.
The device shall require control power of 85-265 volts
ac or 100-250 volts dc.
Configuration
The device configuration and all user-defined values
and settings shall be entered via the keypad. The device
shall be capable of being automatically configured.
Construction
The device shall be provided in a steel case with
provisions for communications connections on the
front of the case. Control power voltage connections
shall also be made on the front of the case. The device
shall be front mounted via mounting holes provided at
each end of the case.
POWER MEASU REME NT LIMITED
EPM 3710 or 3720
g
POWER LEADER
Modbus® Concentrator
Control Power
85Vac-265 Vac
100Vdc-25 0Vdc
Contr ol Power
Commnet segment s t o POWER LEADER Commnet devices
Commnet Connect ions
STATUS
LED s
Commnet Connect ions
3720 ACM
RS485 In/Out
DISPLAY
Selec t
s t
Enter
MULTILIN
Multi l in 565
RS485 connect ion t o
Modbus Concentr ator
POWER LEADER
FEEDER MANAGE MENT RELAY
Met er
565
GE Fanuc 90/30 or 9 0/70
RMS-9D Tr ip Units
RMS- 9C
Trip Unit s
POWER LEADER
Electr onic Power Meter
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GE Electrical Distribution & Control
General Electric Company
41 Woodford Ave., Plainville, CT 06062
DET-136A 0996 BLA © 1995 General Electric Company
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