Introduction

The BSCM Modbus SL/ULP module with commercial reference LV434220 is a Breaker Status Control Module that can be used to communicate data via:

• Modbus Serial Line communication network

• ULP communication network

Use the BSCM Modbus SL/ULP module with:

• ComPacT NSX circuit breakers equipped with:

  • Thermal-magnetic trip units

  • MicroLogic electronic trip units

• ComPacT NSX DC circuit breakers equipped with thermal-magnetic trip units

• ComPacT NSX switch-disconnectors

The following data is exchanged:

• OF and SDE circuit breaker stated from the BSCM Modbus SL/ULP module

• SD circuit breaker state from SD auxiliary contact for BSCM Modbus SL/ULP module or NSX cord (if present)

• Control instructions for the communicating motor mechanism (if present): opening, closing, and resetting

• 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 the MicroLogic data.

The BSCM Modbus SL/ULP module can be used in the following modes:

• Modbus SL only mode

• Modbus SL and ULP mode

• ULP only mode

BSCM Modbus SL Only Mode

In Modbus SL only mode, the BSCM Modbus SL/ULP module is used to connect the ComPacT NSX circuit breaker to the Modbus Serial Line communication network by using a Modbus SL hub with commercial reference LV434224. To read the SD status on the BSCM Modbus SL/ULP module, use the SD auxiliary contact for BSCM Modbus SL/ULP module with commercial reference LV434210.

BSCM Modbus SL and ULP Mode

In Modbus SL and ULP mode, the BSCM Modbus SL/ULP module is used to connect the ComPacT NSX circuit breaker to:

• The Modbus Serial Line communication network via a Modbus SL hub

• ULP modules such as IO module 1, IO module 2, FDM121 display via NSX cord

BSCM ULP Only Mode

In ULP only mode, the BSCM Modbus SL/ULP module is not used as a Modbus SL communication interface.

It is used to connect the ComPacT NSX circuit breaker to ULP modules such as IFM or IFE communication interface, via ULP communication network using NSX cord. Other accessories, such as the IO module and the FDM121 display can also be connected to the same ULP communication network.

For system voltages greater than 480 Vac or 480 Vdc, and less than or equal to 690 Vac or 690 Vdc, this is the only BSCM Modbus SL/ULP module mode allowed, using insulated NSX cord with commercial reference LV434204.

The BSCM Modbus SL/ULP module with commercial reference LV434220 in ULP only mode replaces the BSCM module with commercial reference LV434205.

It is recommended to use the BSCM Modbus SL/ULP module in ULP only mode only with withdrawable and plug-in circuit breakers.