The Front End Module AddFEM is an autonomous unit for the input/output of analog and digital process signals that can be connected with standardized protocols via the PROFIBUS DP fieldbus to the SIMATIC PCS 7 automation system. Its fast response times for signal acquisition and processing should be particularly emphasized.

The product range consists of two versions:

• AddFEM
  • 12 analog inputs
  • 8 analog outputs
  • 12 digital inputs
  • 16 digital outputs (can also be configured as digital inputs)
  • 3 counter/timer inputs (can also be configured as digital inputs)
• AddFEM SoE (Sequence of Event) with a preprocessing Front End Function (FEF)
  • 31 digital inputs with highly exact time tagging.

Both product versions can be operated in redundant pairs. The advantage of AddFEM redundancy is that the switchover in this case takes place independent of the automation system (CPU).

Note:

The AddFEM can be used in combination with SIMATIC PCS 7 V7.1, V8.0 from Update 1 upwards, V8.1 as well as V8.2.