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Bosch Rexroth AG
Connection examples for safe inputs
8.2
Measures to achieve a specific safety integrity level
SIL/SILCL
Performance level
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IndraControl S20 Module With Safe Digital Inputs S20-PSDI-8/4
Key for tables in this chapter:
Representation
Meaning
Bold
Mandatory setting
Normal
Typical setting, another setting is possible depending on the
application
–
Not evaluated
Errors (cross-circuits, short circuits) which can be prevented by correct installation
(e.g., protected cable installation, isolated cable installation, double insulation, use
of ferrules) are not described in the tables.
Only errors between inputs, which are on the same connector, are described. For
example, in the event of correct installation, cross-circuits with inputs/outputs of
other connectors cannot occur.
The safety integrity level (SIL, SILCL, category, and performance level) that can be
achieved is specified for each connection example.
Use the standard to determine the probability of failure in your appli-
cation according to IEC 61508 (SIL) and EN 62061 (SILCL).
Safety integrity
SIL 2/SILCL 2
SIL 3/SILCL 3
Fig. 8-1
PFD and PFH depending on the SIL/SILCL
Use standard EN ISO 13849-1 to determine the performance level.
DOK-CONTRL-S20*PSDI*8*-AP02-EN-P
PFD
-2
1% of 10
-3
1% of 10
PFH
-6
1% of 10
-7
1% of 10
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