ABB IRC5 Compact

with IRC5’s enabling device chain is above 55 years. See safety related
performance for the enabling device chain below.
Performance of IRC5 original enabling device chain
The safety-related performance of the enabling device chain, without the external
enabling device, is as follows:
• MTTF
d
for IRC5 enabling device chain is 80 years.
• IRC5’s enabling device chain’s calculated average probability of dangerous
failure per hour (PFH
d
) is 6.62x10E-08.
• IRC5’s enabling device chain’s design and structure is category 3.
• IRC5’s enabling device chain’s Diagnostic Coverage is medium (90% < DCavg
< 99%).
• The Common Cause Failure (CCF) is met according to the standard
requirements.
Product manual - IRC5 Compact 103
3HAC047138-001 Revision: G
© Copyright 2009-2017 ABB. All rights reserved.
2 Installation and commissioning
2.11.2 Installation of external enabling device
Continued