ABB IRC5 Product Manual page 126

2 Installation and commissioning
2.9.2 Installation of external enabling device
Continued
Performance of IRC5 original enabling device chain
The safety-related performance of the enabling device chain, without the external
enabling device, is as follows:
126
with IRC5's enabling device chain is above 55 years. See safety related
performance for the enabling device chain below.
• MTTF for IRC5 enabling device chain is 80 years.
d
• IRC5's enabling device chain's calculated average probability of dangerous
failure per hour (PFH
• 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.
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) is 6.62x10E-08.
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Product manual - IRC5
3HAC047136-001 Revision: M