Siemens SIMATIC Operating Instructions Manual page 122

Distributed i/o fail-safe engineering et 200pro distributed i/o system - fail-safe modules
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Fail-Safe Electronic Modules
8.3 F -Switch PROFIsafe Digital Electronic Module
Wiring Diagram for Use Case 2.3 – Connecting One Nonequivalent Sensor Via Two Channels
Nonequivalently
One nonequivalent sensor is connected nonequivalently via two channels to two inputs of
the F-I/O module for each process signal (1oo2 evaluation).
The left channels on the F-module (DI0 through DI1) supply the wanted signals. If no faults
are detected, these signals will be available in the I/O area for inputs on the F-CPU.
Note
If the voltage is supplied to the sensor from the F-Switch PROFIsafe 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.
Figure 8-28
Figure 8-29
122
Wiring Diagram for F-Switch - One Nonequivalent Sensor Connected Via Two Channels
Nonequivalently, Internal Sensor Supply
Wiring Diagram for F-Switch - One Nonequivalent Sensor Connected Via Two Channels
Nonequivalently, External Sensor Supply
ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02

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