Recommendations for Protecting Access to the MicroLogic Control or Trip Unit Through FDM121 Display

Functions Accessible Through FDM121 Display

It is possible to access the functions of the MicroLogic control or trip unit from the FDM121 display connected to the IMU.

The FDM121 display shows measurements, alarms, and operating assistance data from the IMU. The FDM121 display can be used to control:

• A circuit breaker equipped with a motor mechanism

• The pre-defined application performed by the IO module.

The FDM121 display is compatible with the following devices:

• MasterPacT MTZ circuit breakers with MicroLogic X control units

• MasterPacT MTZ circuit breakers with MicroLogic Active control units

• MasterPacT NT/NW circuit breakers

• ComPacT NS circuit breakers

• PowerPacT P and R-Frame circuit breakers

• ComPacT NSX circuit breakers

• PowerPacT H, J, and L-Frame circuit breakers

General Recommendations for Protecting Access Through FDM121 Display

To protect access to functions accessible on the FDM121 display, it is recommended to:

• Install the MasterPacT MTZ, ComPacT or PowerPacT circuit breaker and the associated FDM121 display in a locked area so that only authorized personnel can access the FDM121 display

• Keep that area locked at all times.

• Give the key or access code to authorized personnel only.

For further information, see the recommendations for restricting local access to the MasterPacT MTZ, ComPacT or PowerPacT circuit breaker.

Recommendations for Protecting Access to MicroLogic Active Control Unit Through FDM121 Display

Access to MicroLogic Active control units through FDM121 display is allowed only in Auto Local control mode. It is recommended to set the control mode to Manual to avoid intrusive commands.