Connecting ComPacT NSX or PowerPacT H-, J-, and L-Frame Circuit Breakers to the ULP System
Introduction
Use the NSX cord to connect the ComPacT NSX or PowerPacT H-, J-, and L-frame circuit breakers to the ULP system:
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The ComPacT NSX circuit breaker must have a BSCM Modbus SL/ULP module and/or a MicroLogic 5, 6, or 7 trip unit.
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The PowerPacT H-, J-, and L-frame circuit breaker must have a BSCM Modbus SL/ULP module and/or a MicroLogic 5 or 6 trip unit.
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The ComPacT NSX DC circuit breaker must have a BSCM Modbus SL/ULP module.
For more information, refer to the following documentation:
MicroLogic Trip Units
MicroLogic 5, 6, or 7 trip units provide multiple functions:
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Protecting the electrical distribution system or specific applications
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Metering instantaneous values, metering demand values for electrical quantities
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Kilowatt hour metering
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Operating information (such as peak demand, customized alarms, and operation counter)
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Communication
For more information, refer to the following documentation:
BSCM Modbus SL/ULP Module
The BSCM Modbus SL/ULP module is a Breaker Status Control Module that can be used to communicate data via:
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Modbus Serial Line communication network
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ULP communication network
Use the BSCM Modbus SL/ULP module with:
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ComPacT NSX or PowerPacT H-, J-, and L-frame circuit breakers equipped with:
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Thermal-magnetic trip units
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MicroLogic electronic trip units
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ComPacT NSX or PowerPacT H-, J-, and L-frame switch-disconnectors
The following data is exchanged:
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OF and SDE circuit breaker states from the BSCM Modbus SL/ULP module
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SD circuit breaker state from SD auxiliary contact for BSCM Modbus SL/ULP module or NSX cord (if present)
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Control instructions for the communicating motor mechanism (if present): opening, closing, and resetting
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Information to assist the operator: storage of the last 10 events
When connected to a MicroLogic 5, 6, or 7 trip unit, the BSCM Modbus SL/ULP module gives access to MicroLogic data.
The BSCM Modbus SL/ULP module can be used in the following modes:
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Modbus SL only mode
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Modbus SL and ULP mode
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ULP only mode
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Illustration |
Part number |
Documentation |
|---|---|---|
|
LV434220 S434220 |
Modbus SL Hub
The Modbus SL hub is used to connect a BSCM Modbus SL/ULP module in Modbus SL only mode and in Modbus SL and ULP mode, to a Modbus client via the Modbus Serial Line communication network.
 DANGER |
|---|
|
hazard of electric shock, explosion or arc flash
It is forbidden to use the Modbus SL hub when the system voltage is greater than 480 Vac or 480 Vdc.
Failure to follow these instructions will result in death or serious injury.
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For information about connection of the Modbus SL hub to the BSCM Modbus SL/ULP module and to the Modbus-SL network, see Connection to the Modbus-SL Network with BSCM Modbus SL/ULP Module and Modbus SL Hub.
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Illustration |
Part number |
Documentation |
|---|---|---|
|
LV434224 S434224 |
|
NSX Cord
NSX cords are internal connection blocks used to connect a ComPacT NSX or PowerPacT H-, J-, and L-frame circuit breaker equipped with the BSCM Modbus SL/ULP module and/or the MicroLogic 5, 6, or 7 trip unit to a ULP module.
| DANGER |
|---|
|
hazard of electric shock, explosion or arc flash
Failure to follow these instructions will result in death or serious injury.
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The NSX cord is available in three cable lengths and terminates with a RJ45 plug connector for direct connection to a ULP module.
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Illustration |
Length |
Part number |
Documentation |
|---|---|---|---|
|
L = 0.35 m (1.15 ft) |
LV434200 |
|
|
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L = 1.3 m (4.3 ft) |
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||
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L = 3 m (9.8 ft) |
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Lengths up to 5 m (16.4 ft) are possible by using RJ45 socket/socket connectors.
Insulated NSX Cord
The insulated NSX cord is an isolated variant of the NSX cord, terminated by an electronic module with a RJ45 socket connector.
| DANGER |
|---|
|
hazard of electric shock, explosion or arc flash
Failure to follow these instructions will result in death or serious injury.
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Use an RJ45 plug/plug ULP cord to connect the isolated electronic module of the NSX cord to a ULP module.
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Illustration |
Length |
Part number |
Documentation |
|---|---|---|---|
|
L = 1.3 m (4.3 ft) |
LV434204 S434204 |
|
|
|
L = 3 m (9.8 ft) |
S434303 |
The electronic module of the insulated NSX cord must be powered by a 24 Vdc power supply so that the ULP system is isolated.
The following table summarizes the electronic module characteristics:
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Characteristic |
Value |
|---|---|
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Dimensions |
27 x 27 x 27 mm (1 x 1 x 1 in) |
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Mounting |
On DIN rail |
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Degree of protection of the installed module |
|
|
Operating temperature |
-25 °C to +70 °C (-13 °F to +158 °F) |
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Power supply voltage |
24 Vdc -20%/+10% (19.2–26.4 Vdc) |
|
Consumption |
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Connection to the ULP System with NSX Cord
| DANGER |
|---|
|
hazard of electric shock, explosion or arc flash
Failure to follow these instructions will result in death or serious injury.
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The following figures show connection of the ComPacT NSX or PowerPacT H-, J-, and L-frame circuit breaker to the IMU with the NSX cord.
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Circuit breaker with MicroLogic 5, 6, or 7 trip unit |
Circuit breaker with BSCM Modbus SL/ULP module |
Circuit breaker with BSCM Modbus SL/ULP module and MicroLogic 5, 6, or 7 trip unit |
|---|---|---|
|
A NSX cord B BSCM Modbus SL/ULP module |
A NSX cord B BSCM Modbus SL/ULP module C MicroLogic 5, 6, or 7 trip unit |
Connection to the ULP System with Insulated NSX Cord
| DANGER |
|---|
|
hazard of electric shock, explosion or arc flash
Failure to follow these instructions will result in death or serious injury.
|
The following figures show connection of the ComPacT NSX or PowerPacT H-, J-, and L-frame circuit breaker to the IMU with the insulated NSX cord.
