SED 024.16.720 - Page 36

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36
Installation
Type 024.16.720
Control function Pneumatic connection Type 024.16.720 with actuator
Control air connection
Type 024.16.720
Actuator input
A
Process valve closed in rest position
(by spring force)
2
1
lower chamber of the actuator
2
2
should be connected to the
upper chamber of the actuator
B
Process valve open in rest position
(by spring force)
2
1
upper chamber of the actuator
2
2
should be connected to the
lower chamber of the actuator
Table 13: Pneumatic connection to actuator
"In rest position" means that the control valves of the positioner Type 024.16.720 are isolated or not
actuated.
If the ambient air is humid, a hose can be connected between control air connection 2
2
of the positioner
and the unconnected chamber of the actuator for control function A or control function B. As a result,
the spring chamber of the actuator is supplied with dry air from the vent duct of the positioner.