General presentation of the COM option

The COM option is available for all devices of the ranges:
1) Compact NS630b to 1600
2) Masterpact NT and NW, equipped with Micrologic A, P and H control units. With the option, the devices may be integrated in a supervision system implementing the ModBUS protocol.

In conjunction with the Micrologic control units, the option is used to:
1) Analyse distribution-system parameters for operating and maintenance purposes
2) Control the device
3) Indicate status conditions
4) Identify the causes of faults
5) Set protection functions
6) Identify the device.

Status indication by the COM option is independent of the device indication contacts. These contacts remain available for conventional uses.