Fail-Safe Electronic Modules
8.3 F -Switch PROFIsafe Digital Electronic Module
ET 200pro Distributed I/O System - Fail-Safe Modules
114
Operating Instructions, 05/2007, A5E00394073-02
8.3.5
Wiring of Inputs of the F-Switch PROFIsafe Electronic Module
Note
The information about wiring options and specific parameters in
STEP 7 (use cases) in the
following section is applicable to the F-Switch PROFIsafe.
Use Case Selection
The following figure provides information to help you select the use case that corresponds to
your fail-safe requirements. The following sections provide instructions on wiring the F-
module and identify the parameters you must assign in
STEP 7 for each use case.
2
1
3
Required
safety class?
Use cases 1 to 3
See case
1
Not intended
See cases
2.1
2.2
2.3
See cases
3.1
3.2
SIL3/Category 3
SIL3/Category 4
Figure 8-22 Use Case Selection
WARNING
The achievable safety class is dependent on the quality of the sensor and the magnitude of
the proof-test interval in accordance with IEC 61508.
