Safety Function

The counter module samples the switching operations of the connected sensors with

safety-related accuracy (1 % if the frequency is measured, ± 1 pulse if the pulse is

measured) .

The safety function is performed in accordance with SIL 3.

Reaction in the Event of a Fault

If a fault occurs, the counter module enters the safe state. The rotation speed is set to 0.

The user program retains its last valid process value for the counter readings.

The module activates the Error LED on the front plate.

Scope of Delivery

The counter module must be installed on a suitable connector board to be able to operate.

If a FTA is used, a system cable is required to connect the connector board to the FTA.

Connector boards, sensor selection plug, system cables and FTAs are not included within

the module’s scope of delivery.

The various connector boards are described in Chapter 3.6. the system cables in Chapter

3.7. The FTAs are described in separated manuals.