Fail Safe Functions - GEM 1441 cPos-X Manual

Fail safe functions

Fail safe functions
Case
1 Power supply failure
2 Compressed air supply failure
However, the fail safe function does not replace the plant-specific safety devices.
Adjustable safety reactions
Error
Set value < 4 mA
(range below the set value under I Min W
can be adjusted 0–22 mA)
Set value > 20 mA
(range below the set value I max can be
adjusted from 0–22 mA)
* Safe = default setting. In this case, the valve actuator is moved to its safety position (undefined for double acting)
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Error
Single acting fail safe: Venting
Single acting fail freeze: Blocking
Double acting fail safe: Venting
Double acting fail freeze: Blocking
Single acting fail safe: Venting
Single acting fail freeze: Blocking
Double acting fail safe: Venting
Double acting fail freeze: Blocking
Single and double acting
Adjustable function
(Open, Close, Hold, Safe*)
Single and double acting
:Adjustable function
(Open, Close, Hold, Safe*)
Connection A1 (2)
Connection A1 (2)
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Fail safe functions
Connection A2 (4)
Single acting: - (No connection avail-
able)
Double acting fail safe: Venting
Double acting fail freeze: Blocking
Single acting: - (No connection avail-
able)
Double acting fail safe: Venting
Double acting fail freeze: Blocking
Connection A2 (4)
Single acting: (Connection not available)
Double acting: Adjustable function
(Open, Close, Hold, Safe*)
Single acting: (Connection not available)
Double acting: Adjustable function
(Open, Close, Hold, Safe*)
GEMÜ 1441