BSCM Modbus SL/ULP Module Modes

Use of the BSCM Modbus SL/ULP Module Depending on the System Voltage

DANGER
hazard of electric shock, explosion or arc flash Do not connect the BSCM Modbus SL/ULP module to Modbus Serial Line communication network when the system voltage is greater than 480 Vac or 480 Vdc. Failure to follow these instructions will result in death or serious injury.

When the system voltage is lower than 480 Vac or 480 Vdc, you can use the BSCM Modbus SL/ULP module in the following modes:
- In Modbus SL only mode
- In ULP only mode
- In Modbus SL and ULP mode
When the system voltage is greater than 480 Vac or 480 Vdc, and less than or equal to 690 Vac or 690 Vdc, use the BSCM Modbus SL/ULP module in ULP only mode, with the insulated NSX cord.

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.

The figure below illustrates an example of the BSCM Modbus SL/ULP module in Modbus SL only mode.

Modbus TCP client
Ethernet cable
Modbus SL hub (LV434224)
Modbus SL cord (LV434221, LV434222, or LV434223)
BSCM Modbus SL/ULP module (LV434220)
MicroLogic 5, 6, or 7 trip unit
SD auxiliary contact for BSCM Modbus SL/ULP module (LV434210)
IFE Ethernet switchboard server (LV434002)

BSCM ULP Only Mode

In ULP only mode, the BSCM Modbus SL/ULP module 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 ULP modules such as the IO module and the FDM121 display can also be connected to the same ULP communication network.

DANGER
hazard of electric shock, explosion or arc flash If the system voltage is greater than 480 Vac or 480 Vdc, and less than or equal to 690 Vac or 690 Vdc, ULP only mode is the only BSCM Modbus SL/ULP module mode allowed, using insulated NSX cord with commercial reference LV434204. It is forbidden to use the BSCM Modbus SL/ULP module or the insulated NSX cord for system voltages greater than 690 Vac or 690 Vdc. Failure to follow these instructions will result in death or serious injury.

DANGER

hazard of electric shock, explosion or arc flash

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

Failure to follow these instructions will result in death or serious injury.

The ULP only mode is recommended to connect plug-in or withdrawable ComPacT NSX circuit breakers to a communication network, by using an IFM or IFE communication interface.

The BSCM Modbus SL/ULP module with commercial reference LV434220 in ULP only mode replaces the BSCM module with commercial reference LV434205. The specific features of BSCM module with commercial reference LV434205 are detailed in the appendices.

The figure below illustrates an example of the BSCM Modbus SL/ULP module in ULP only mode.

Modbus TCP client
Ethernet cable
IFE Ethernet interface for one circuit breaker (LV434001) or IFE Ethernet switchboard server (LV434002)
BSCM Modbus SL/ULP module (LV434220)
MicroLogic 5, 6, or 7 trip unit
NSX cord (LV434200, LV434201, LV434202, or LV434204)
ULP cord (LV434195, LV434196, LV434197, or LV434198)
IO module (LV434063)
FDM121 display (TRV00121)

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

NOTE: Connection to an IFM or IFE communication interface used as a ULP module is not possible in this mode. If you connect to an IFM or IFE communication interface as a ULP module, the Modbus connection via the Modbus SL hub is not operational any more.

The power to the BSCM Modbus SL/ULP module, to the connected ULP modules and to the MicroLogic 5, 6, or 7 trip unit is provided by the Modbus SL hub. The Modbus SL hub can be powered directly by the terminal block connector or through the stacking connector.

The figure below illustrates an example of the BSCM Modbus SL/ULP module in Modbus SL and ULP mode.

Modbus TCP client
Ethernet cable
Modbus SL hub (LV434224)
Modbus SL cord (LV434221, LV434222, or LV434223)
BSCM Modbus SL/ULP module (LV434220)
MicroLogic 5, 6, or 7 trip unit
NSX cord (LV434200, LV434201, LV434202, or LV434204)
IFE Ethernet switchboard server (LV434002)
ULP cord (LV434195, LV434196, LV434197, or LV434198)
IO module (LV434063)
FDM121 display (TRV00121)

BSCM Modbus SL/ULP Module and Communicating Motor Mechanism

When the ComPacT NSX circuit breaker is fitted with a communicating motor mechanism, the BSCM Modbus SL/ULP module is mandatory to enable connection of the motor mechanism to a communication network.

If the BSCM Modbus SL/ULP module is in Modbus SL only mode, the SD auxiliary contact for BSCM Modbus SL/ULP module is mandatory to provide the SD status to the communicating motor mechanism.