Attainable Safety Level; Failures Due To Common Cause (Common Cause Failure - Ccf) - Festo CPX-FVDA-P2 Traducción Del Manual De Instrucciones Original

CPX-FVDA-P2
Note
In the event of damage caused by unauthorised manipulation or other than
intended use, the guarantee is invalidated and the manufacturer is not liable
for damages.

Attainable safety level

With the CPX-FVDA-P2, safety functions can be implemented up to:
– Safety integrity level SIL 3 in accordance with IEC 61508
– Performance level e, cat. 3 in accordance with EN ISO 13849-1.
The CPX-FVDA-P2 achieves an SIL entitlement limit of max. SIL CL3 in accordance
with EN 62061.
The attainable safety level of the entire safety system depends on other compon-
ents used to implement the safety function.
To maintain the safety level:
S
Check the operational capability of the safety system at adequate time inter-
vals (
Failures due to common cause (common cause failure – CCF)
Common cause failures cause the loss of the safety function, since both channels
(P and M) in a two-channel system fail simultaneously.
Through the following measures, you ensure that common cause failures are
avoided:
– Maintain operating voltage limits
– Comply with temperature range
– Use max. 2 output channels in a shared safety-oriented control circuit
Additional measures for avoidance of common cause faults may result from the
application.
Festo CPX-FVDA-P2-Z6 1209NH English
Technical data).
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