BBH SMX 12-2 - Appendix; Appendix A - Classification of Switch Types

Installation manual
HB-37350-810-01-51F-EN SMX Installation manual.docx Page 227 of 234
Version: 50F
Appendix
Appendix A – Classification of switch types
General note:
The individual switches of the following input elements can be assigned to the digital inputs
DI1 to DI8 as desired.
Enable switch
Switch type
Comment
Classification PI acc.
to EN ISO 13849-1
Classification SIL acc.
to IEC 61508
1 normally closed
Enable switch standard
PL d
SIL 2
1 normally open
Enable switch standard
PL d
SIL 2
2 normally closed
Enable switch higher
requirements
PL e
SIL 3
2 normally closed
time monitored
Enable switch monitored
PL e
SIL 3
Emergency Stop
Switch type
Comment
Classification
category
Classification SIL
1 normally closed
Emergency Stop
standard
PL d
1)
SIL 2
2 normally closed
Emergency stop higher
requirements
PL e
SIL 3
2 normally closed time
monitored
Emergency Stop
monitored
PL e
SIL 3
1)
Fault exclusions and boundary conditions acc. EN 13849-2 must be observed!
Door monitoring
Switch type
Comment
Classification
category
Classification SIL
2 normally closed
Door monitoring higher
requirements
PL e
SIL 3
2 normally closed
time monitored
Door monitoring monitored
PL e
SIL 3
1 normally open + 1
normally closed
Door monitoring higher
requirements
PL e
SIL 3
1 normally open + 1
normally closed time
monitored
Door monitoring monitored
SIL 3
2 normally open + 2
normally closed
Door monitoring higher
requirements
PL e
SIL 3
2 normally open + 2
normally closed time
monitored
Door monitoring monitored
PL e
SIL 3
3 normally closed
Door monitoring higher
requirements
PL e
SIL 3
3 normally closed
time monitored
Door monitoring monitored
PL e
SIL 3