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User Manual
Model PCS
Pneumatic Motion Control System
Problem:
Air lines between the actuator and PCS valves are too long.
Solution:
Longer air lines cause the system to be less accurate or respond slower. Always use the shortest
possible lines as possible (<18”). The system will work with longer lines, but may not be repeatable enough
for application requirements. Option N allows you to mount the valves close to the actuator with the PCS
electronics mounted separately.
Problem:
Air Supply pressure is too low (below 70 psi).
Solution:
Turn air supply up to at least 70 psi. Low air pressure can cause the actuator to slow down. If the air
supply experiences pressure drops due to excess air demand in the building’s air supply system, an air reservoir
may be required.
Problem:
The Electrical Power Supply is supplying less than the required 23.5 VDC.
Solution:
Utilize a DC power supply that can supply the minimum 23.5 VDC required by the PCS. At voltages
less than 23.5 VDC, the system performance will degrade.
Problem:
Decreased velocity due to flow control misadjustment.
Solution:
Some applications require flow controls to limit velocity in order to attain required repeatability. The
flow controls may have been adjusted after initial settings were made. Re-adjust to proper settings.
Problem:
Excess friction is being exerted by application components.
Solution:
Reduce the friction to levels outlined in the installation section of the manual.
Problem:
PCS system parameters are not adjusted properly.
Solution:
Follow the Installation instructions to make the appropriate system adjustments for your application
parameters, ensuring that the deadband Some applications require flow controls to limit velocity in order to
attain required repeatability. The flow controls may have been adjusted after initial settings were made. Re-
adjust to proper settings and decel adjustments are adjusted according to the application requirements. An
unnecessarily wide deceleration zone will result in lower average velocities.
