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1435
e
Pos
19 Fail safe function
Error Outlet A1 Outlet A2
Electrical power supply failure
Single acting: vented
Double acting: vented
Single acting: non existent
Double acting: pressurized
Pneumatic supply failure
Single acting: vented
Double acting: undefined,
dependent on the
operating conditions of the actuator
Single acting: non existent
Double acting: undefined,
dependent on the
operating conditions of the actuator
This fail safe function is not a substitute for specific plant safety requirements
Fail safe function
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