Siemens SIMATIC Operating Instructions Manual page 119

Wiring Diagram for Use Case 2.2 – Connecting One Two-Channel Sensor Via Two Channels
One two-channel sensor is connected via two channels to two inputs of the F-module for
each process signal (1oo2 evaluation).
The wiring is carried out at the appropriate connection module.
Figure 8-25
Figure 8-26
ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02
Wiring Diagram for F-Switch - One Two-Channel Sensor Connected, Internal Sensor
Supply
Wiring Diagram for F-Switch - One Two-Channel Sensor Connected Via Two Channels,
External Sensor Supply
Fail-Safe Electronic Modules
8.3 F -Switch PROFIsafe Digital Electronic Module
119