Siemens SIMATIC ET 200AL, System Manual

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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)
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Equipment Manual, V1.0, 05/2021, A5E51082342-AA
Parameter assignment
Parameter name Parameter value
Sensor evaluation 1oo2 evaluation, 2 channel - 3 wire nonequiva-
lent
Sensor supply Internal
Short-circuit test Enable
F-DI application mode 6
This application mode uses a two-channel sensor or two single-channel sensors with two
nonequivalent outputs 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.
The application mode uses the following pins:
•
Pin 2 (channels 2 and 3) is the inverted input of the nonequivalent configuration
• Pin 4 (channels 0 and 1) is the non-inverted input of the nonequivalent configuration
Note
To incorporate F-DI application mode 6 into a SIL 3-rated application, ensure the sensors are
appropriately qualified devices.
Figure 5-9 F-DI application mode 6: External sensor supply (1oo2 evaluation of two-channel sensor with nonequivalent
outputs shown)
Parameter assignment
Parameter name Parameter value
Sensor evaluation 1oo2 evaluation, 2 channel - 3 wire nonequiva-
lent
Sensor supply External