Use Case 3.1 (Sil3/Cat.4/Ple) - Siemens SIMATIC ET 200SP Manual

Applications of the F-I/O module
5.4 Application 3: Safety mode SIL3/Cat.4/PLe
5.4.1

Use case 3.1 (SIL3/Cat.4/PLe)

Wiring diagram – connecting a two-channel sensor via two channels
A two-channel sensor is connected to two inputs of the F-module for each process signal
(1oo2 evaluation).
Supply the sensors from two different sensor supplies.
Figure 5-8
You can also connect two single-channel sensors via two channels. In this case, the same
process variable is acquired with two mechanically separate sensors.
Figure 5-9
To achieve SIL3/Cat.4/PLe using this wiring, you must use a suitably qualified sensor.
Parameter assignment
Assign the following parameters for the corresponding channel:
Table 5- 6
Parameter
Sensor evaluation
Short circuit test
Sensor supply
38
One two-channel sensor connected via two channels, internal sensor supply
Two single-channel sensors connected via two channels, internal sensor supply
WARNING
Parameter assignment
1oo2 evaluation, equivalent
enable
Sensor supply n (internally by at least one channel)
•
External
•
Digital input module F-DI 8x24VDC HF (6ES7136-6BA00-0CA0)
Manual, 07/2013, A5E03858068-01