Kval 994-X Operation And Service Manual page 162

Pre-hanging door system
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About a Typical Pneumatic Circuit
The
senses the voltage from the
4.
PLC
to the
Control Valve.
Control Valve
24 V Applied
Extend Sensor:
Activated
Retracted Sensor:
Deactivated
PLC
Retract Process
If the
determines the conditions are right to retract the
PLC
The
1.
Control Valve
The
2.
Cylinder
When the
3.
The
4.
PLC
Position Feed Back
Extend
Sensor
Activated
Cylinder
Air Pressure Extends
Cylinder and Router
Assembly
Air In
Position Feedback
Translated
Positioning
Instructions
24 Volts
Positioning
System
directs compressed air to the retract port of the
and
retract deactivating the
Router
and
are fully retracted, the
Cylinder
Router
senses the voltage from the
KVAL 994-X Operation/Service Manual
6-18
and removes the control voltage
Extend Sensor
Router Assembly (Load)
Force
Extended
Router
Extend Sensor
Retract Sensor
completing the process
Retract Sensor
EXTENDED
Load
:
Cylinder.
is activated.

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