11. INSTRUCTIONS FOR TROUBLESHOOTING A CONTROL
BOARD
The Power Supply recharge circuitry either reduces (high voltage board) or increases (low volt-
age board) input voltage within the specified range supplied to maintain an 80 V charge voltage
across the capacitors.
The Control Unit monitors binary inputs and outputs, hardware and software configurations,
position sensors, capacitor charge, and switches the FET circuit to connect the capacitor
voltage to the magnetic actuator coils following an open or close command.
Warning: Because of the risk of death or serious bodily injury, capacitors must be fully
discharged prior to troubleshooting.
Apx Figure 8 Standard Actuator Control Board and Pin Assignments
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