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Installation manual
PSC1-C-10 Installation manual V2.6
Page 170 of 173
Version: 57E
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
contacts
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
c 1 normally
closed contact
Door monitoring for
increased requirement
PL e
SIL 3
1 normally open
c 1 normally
closed contact time
monitored
Monitored door monitoring PL e
SIL 3
2 normally open
c 2 normally
closed contact
Door monitoring for
increased requirement
PL e
SIL 3