WEG CPW17 User Manual page 11

General Information
MTTFd
„
Mean Time To dangerous Failure: Expectation of the mean time to failure. Normally expressed as an average of
expectation of the time to failure.
[EN ISO 13849-1:2015 and IEC 62061:2005]
OSSD
„
Output Signal Switching Device: Output switching element, verified by inspections or tests, independently and
continuously, able to detect the following foreseeable faults when in ON-state:
Short circuit of the output to supply voltage.
„
Short circuit of the output to ground.
„
Short circuit between outputs.
„
Overload.
„
[IEC 61496-1:2012]
SELV / PELV
„
Safety Extra-Low Voltage / Protective Extra-Low Voltage: Eletric system in wich the voltage cannot exceed the value
of extra-low voltage, protecting against eletric shock under normal operation and under single fault conditions,
including earth faults in order electric circuits.
[IEC 61140:2016]
10 | CPW17