Fail-Safe Electronic Modules
8.1 8 /16 F-DI DC24V PROFIsafe Digital Electronic Module
ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02
63
8.1.5 Wiring of Inputs of 8/16 F-DI DC24V PROFIsafe Electronic Module
Note
The following sections on wiring options and specific
STEP 7
parameters (use cases) apply
to the 8/16 F-DI and the inputs of the 4/8 F-DI/4 F-DO.
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.
5HTXLUHG
VDIHW\FODVV"
8VHFDVHVWR
6HHFDVH
6HHFDVHV
6HHFDVHV
6,/&DWHJRU\ 6,/&DWHJRU\ 6,/&DWHJRU\
Figure 8-2 Use Case Selection
WARNING
The achievable safety class depends on the sensor quality and the size of the proof-test
interval in accordance with IEC 61508. If the sensor quality is less than that of the required
safety class, the sensor must be installed redundantly and connected via two channels.
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