Pneumatic Connections; Control Function 1; Connecting The Control Medium - GEM 660 Operating Instructions Manual

11 Pneumatic connections

11.1 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 (NC) +
2 (NO) -
3 (DA) +
+ = available / - = not available
(see figures for connectors 2/4)
www.gemu-group.com
Connector 4
Connector 2
Connections
2 4
-
+
+

11.2 Connecting the control medium

1. Use suitable connectors.
2. Connect the control medium lines tension-free and
without any bends or knots.
Thread size of the control medium connectors:
Diaphragm size 8: M5
Diaphragm size 10: G1/8
Diaphragm size 25: G1/4
Control function
1 Normally closed (NC)
2 Normally open (NO)
3 Double acting (DA)
For connectors 2/4 see figure on the left
It is possible to control actuator version R via the connections
offset by 90°.
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11 Pneumatic connections
Connections
2: Control medium (open)
4: Control medium
(close)
2: Control medium (open)
4: Control medium
(close)
GEMÜ 660