Bernecker + Rainer 4MP181.0843-03, User Manual

Page: 119 / 160

Standards and Certifications • Standards and Definitions for Safety Technology
Chap
ter 5
Sta
nda
rds a
nd
Certifi
cati
ons
119 Mobile Panel User's Manual V 1.5
Selecting the suitable safety category must be done based on a risk evaluation. This risk
evaluation is a part of the total risk evaluation for the machine.
The following risk graph (according to EN 954-1, Appendix B) provides a simplified procedure
for risk evaluation:
Information:
Connections examples with a suitable monitoring device in chapter 3 "Start-up /
Operation", section "Connection Examples for the E-stop and Key Switch", on
page 86 and section "Connection Example for the Enable Switch", on page 90 show
how safety category 4 according to EN 954-1 can be achieved with the Mobile Panel
and its safety-related parts. Take note that the entire system concept must be
designed accordingly.
Figure 53: Risk graph according to EN 954-1, Appendix B
Safety integrity level - SIL
(according to IEC 61508-2)
Starting point for the
risk evaluation of the
safety related parts
of the controller
B, 1 to 4
Preferred categories
Possible categories which require extra measures
Measure which may be over-dimensioned with regard to the actual risk
Safety categories for safety related parts of controllers
Safety Category
(according to IEC 954-1)
- 1 1 2 3
S1
S2
F1
F2
P1
P1
P2
P2
B 1 2 3 4