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Operating Instructions
4.4.1
Safe end position
The safety end position after failure of the auxiliary electric power depends on the pneumatic connection of the actuator to the wor-
king ports A1 or A2.
Drive type
Designation
Single-acting
up
Control function FC
down
Single-acting
up
Control function FO
down
obere
Kammer
untere
Kammer
Double-acting
up
Control function DA
down
4.4.2
Standard: Use of positioner port A1
Type Positioner
Pneumatic actuator Positioner Pneumatic actuator
Connection 1
Port RIGHT
FC
A1
OPEN
FO
A1
CLOSE
DA
A1
OPEN
4.4.3
Special variant: Use of positioner port A2
Type Positioner
Pneumatic actuator Positioner Pneumatic actuator
Port 1
Port LEFT
FC
-
-
FO
-
-
DA
A1
CLOSE
Safety end positions after failure of the auxiliary power Pneumatic
down
Connect working connection
A1 to actuator
Close A2
Connect working connection A1 and A2 to actuator
up = lower
Chamber of the actuator at
A2
Port 2
Port LEFT
-
-
-
-
A2
CLOSE
Port 2
Port RIGHT
A2
OPEN
A2
CLOSE
A2
OPEN
A2
A1
up
Connect working connec-
tion A2 to actuator
Close A1
down = upper
Chamber of the actuator at
A2
Basic Position
Position Pneumatic
actuator
CLOSE
OPEN
CLOSE
Basic Position
Position Pneumatic
actuator
OPEN
CLOSE
OPEN
Type RPC positioner
down
up
Undefined
Positioner value
4mA
4mA
4mA
Positioner value
4mA
4mA
4mA
19
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