Siemens SIMATIC Operating Instructions Manual page 68

Fail-Safe Electronic Modules
8.1 8 /16 F-DI DC24V PROFIsafe Digital Electronic Module
Wiring Diagram for Use Case 2.1 – Connecting One Sensor Via One Channel to Two Inputs
One sensor is connected via one channel to two inputs of the F-module for each process
signal (1oo2 evaluation).
Note
If the voltage is supplied to the sensor from the F-DI module, you must use the internal
sensor supply Vs1. Connection to Vs2 is not possible.
The wiring is carried out at the appropriate connection module.
The figures below illustrate an example wiring diagram for channel groups 1 and 2.
1L+
1L+ M
L+
Figure 8-5
68
Vs1 DI0
S0
M
Wiring Diagram for F-DI Modules - One Sensor Connected Via One Channel to Two
Inputs, Internal Sensor Supply
8/16 F-DI
4/8 F-DI/4 F-DO
DI1 DI2 DI3
S1
S2
S3
ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02
Vs2 DI4 DI5 DI6 DI7