Applications of the F-I/O module
5.1 Digital input applications
Digital I/O module F-DI 4+F-DQ 2x24VDC/2A, 4xM12 (6ES7146-5FF00-0BA0)
Equipment Manual, V1.0, 05/2021, A5E51082342-AA
45
Figure 5-5
F-DI application mode 3: Internal sensor supply (1oo2 evaluation of two single-channel sensors shown)
Parameter assignment
Parameter name
Parameter value
Sensor evaluation
1oo2 evaluation, 2 channel equivalent
Sensor supply
Internal
Short-circuit test
Enable
F-DI application mode 4
This application mode uses a two-channel sensor or two single-channel sensors in a 1oo2
voting with discrepancy 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 4 into a SIL 3-rated application, ensure the sensors are
appropriately qualified devices.
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