Siemens SIMATIC ET 200AL System Manual page 949

F-DI application mode 2
This application mode uses single-channel sensors with a 1oo1 evaluation. When you use an
external sensor supply, the module does not evaluate that channel for short-circuit testing.
Note
To incorporate F-DI application mode 2 into a SIL 2-rated application, ensure the sensors are
appropriately qualified devices.
Figure 5-3 F-DI application mode 2: External sensor supply (1oo1 evaluation of two single-channel sensors shown)
Parameter assignment
Sensor evaluation
Sensor supply
Digital I/O module F-DI 4+F-DQ 2x24VDC/2A, 4xM12 (6ES7146-5FF00-0BA0)
Equipment Manual, V1.0, 05/2021, A5E51082342-AA
Parameter name
Applications of the F-I/O module
5.1 Digital input applications
Parameter value
1oo1 evaluation
External
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