Siemens SIMATIC ET 200SP Manual page 35

Wiring diagram – connecting two single-channel sensors via two channels
Two single-channel sensors that capture the same process value are connected to two
inputs of the F-module for each process signal (1oo2 evaluation).
Figure 5-6
You can also supply the sensors by means of an external sensor supply.
Figure 5-7
To achieve SIL3/Cat.3/PLe using this wiring, you must use a qualified sensor.
Parameter assignment
Assign the following parameters for the corresponding channel:
Table 5- 4
Parameter
Sensor evaluation
Short circuit test
Digital input module F-DI 8x24VDC HF (6ES7136-6BA00-0CA0)
Manual, 07/2013, A5E03858068-01
Two single-channel sensors connected via two channels, internal sensor supply
Two single-channel sensors connected via two channels, external sensor supply
WARNING
Parameter assignment
5.3 Application 2: Safety mode SIL3/Cat.3/PLe
Channel with internal sensor
supply
1oo2 evaluation, equivalent
disable
•
enable
•
Applications of the F-I/O module
Channel with external sensor
supply
disable
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