About Motion Control
KVAL 994-X Operation/Service Manual
6-6
Typical Positioning System Pneumatic Circuit
A control valve (solenoid) is used to drive cylinders to move different loads in the
machine. For Example: extending and retracting router, drill, clamping a door.
PLC
Output
High
Pressure
Air
Cylinder
Common
Control Circuit
ON
Should measure
24 VDC here
Control Voltage
Should have High
Pressure air here
Extended
Cylinder
Retracted
Control
Control
(Coil)
Input
Air
Input
Air
Output
Valve
Should have High
Pressure air on
Activated Output
FIGURE6- 26. Block Diagram of a Pneumatic Circuit
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