Operation; Pneumatic Connections; Control Function 1 - GEM 615 Operating Instructions Manual

10 Pneumatic connections

9.8 Operation

Optical position indicator
Valve open
GEMÜ 615
Valve closed
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10 Pneumatic connections
10.1 Control function
The following control functions are available:

Control function 1

Normally closed (NC):
Valve resting position: closed by spring force. Activation of
the actuator (connector 2) opens the valve. When the actuator
is vented, the valve is closed by spring force.
Control function 2
Normally open (NO):
Valve resting position: opened by spring force. Activation of
the actuator (connector 4) closes the valve. When the actu-
ator is vented, the valve is opened by spring force.
Control function 3
Double acting (DA):
Valve resting position: no defined normal position. The valve
is opened and closed by activating the respective control me-
dium connectors (connector 2: open/connector 4: close).
Control function 1: connector 4 is closed with a blanking plug.
Control function 2: connector 2 is closed with a blanking plug.
Control function
1 (NC) +
2 (NO) -
3 (DA) +
+ = available / - = not available
(see figure for connectors 2 / 4)
Connector 4
Connector 2
Connectors
2 4
-
+
+
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