schmersal PSC1 - 13 Appendix; Appendix A - Categorisation of the Switch Types

Installation manual
HB-37420-810-01-25F-EN PSC1-C-100 Installation manual - V2.2.docx Page 196 of 201
Version: 25F
13 Appendix
13.1 Appendix A – categorisation of the switch types
General note:
The individual switches for the following input elements can be assigned as required to the
digital inputs I0 to I13.
Enable switch
Switch type Remark PL categorisation
according to EN ISO
13849
-
1
SIL categorisation
according to EN 61508
1 normally closed
contact
Simple enable switch
PL d
SIL 2
1 normally open
contact
Simple enable switch PL d SIL 2
2 normally closed
contact
Enable switch for increased
requirement
PL e SIL 3
2 normally closed
contacts time
monitoring
Monitored enable switch PL e SIL 3
Emergency stop
Switch type Remark Category
categorisation
SIL categorisation
1 normally closed
contact
EMERGENCY STOP
simple
PL d
1)
SIL 2
2 normally closed
contact
EMERGENCY STOP for
increased requirement
PL e SIL 3
2 normally closed
contacts time
monitoring
EMERGENCY STOP
monitored
PL e SIL 3
(1)
Fault exclusions and boundary conditions according to EN ISO 13849-2 are to be observed!
Door monitoring
Switch type Remark Category
categorisation
SIL categorisation
2 normally closed
contact
Door monitoring for
increased requirement
PL e SIL 3
2 normally closed
contacts time
monitoring
Monitored door monitoring PL e SIL 3
1 normally open
contact + 1 normally
closed contact
Door monitoring for
increased requirement
PL e SIL 3
1 normally open
contact + 1 normally
closed contact time
monitored
Monitored door monitoring PL e SIL 3