Surge protection module (FSM)
1
Module FSM Side 1 (above)
2
Module FSM Side 2 (above)
3
Plugs
The FSM module is designed for surge diversion to analogue or S0 connection lines. Surge protection is required for
each interface to be protected. Surges arising on the lines are discharged to the functional earth (see page 5 ,15).
Hence, you must imperatively install and connect the functional earth (min. 2.5 mm2 wire), as protection is other-
wise not present. The FSM module is plugged into the matching slots of the connection modules (see page8). The
FSM is symmetrical in structure. It can be inserted in any direction.
The FSM is a one-time fuse, meaning that once a module has been removed, it must be replaced with a new module.
If a surge protection module is actuated by an overvoltage, this cause a short-circuit in the connection lines. If there is
no tone when the receiver is picked up, the module should be checked. Before checking, disable the connection and
the 230 V ~ power supply to the system.
If the system is operated in a complex electromagnetic environment (e.g. at locations with machines, lifts,
printers, etc.), every connected interface must be protected via the surge protection module (FSM). Here
again, it is imperative that a functional earth is connected to the system.
Surge protection module (FSM)
Module Connection (MC)
38
elm
eg
1
2
3
