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
69
8/16 F-DI
4/8 F-DI/4 F-DO
1L+ M DI0 DI1 DI2 DI3 DI4 DI5 DI6 DI7 Vs1 Vs2
L+ M
S0
S1
S2
S3
1L+
Figure 8-6 Wiring Diagram for F-DI Modules - One Sensor Connected Via One Channel to Two
Inputs, External Sensor Supply
WARNING
In order to achieve SIL3/Category 3 with this wiring, you must install a suitably qualified
sensor, for example, in accordance with IEC 60947.
Assignable Parameters for Use Case 2.1
Set the "Evaluation of the sensors" parameter to "1oo2 evaluation" and the "Type of sensor
interconnection" parameter to "1-channel" for the relevant input. The discrepancy time is
permanently preset to 10 ms and cannot be changed.
You can enable or disable the "Short-circuit test" parameter. However, you must disable the
short-circuit test as soon as at least one fail-safe digital input is externally supplied.
Otherwise, the "Short circuit" diagnostic is reported.
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