Electronic Driver Module (PCB)

The printed circuit board (PCB) is mounted on top of the housing (see Figure

1-6). The PCB performs the following tasks:

 Power Supply

 Isolated Input and Outputs

 Dual Redundant Demand Inputs

 Dual Redundant Inputs for Final Cylinder Feedback

 Microprocessor-based Control

 Actuator H-Bridge Drive

 Current Limiting for Thermal Protection

 Advanced Diagnostics

 Discrete Outputs for Fault, Alarm, and Shutdown Enunciation

The shield connections for the Analog Output (terminal #20), CAN1 (terminal

#23), and CAN2 (terminal #29) are through capacitors only as indicated in the

wiring section of this manual.

The power supply section performs the EMI filtering on the (18 to 32) V (dc) input

voltage and generates controlled voltages for several electronics sub-systems.

The power supply system is monitored for proper operation. If input voltage or

internal power systems are detected outside of allowable operating ranges, a

diagnostic alarm will be enunciated.

Calibration and configuration of alarms and shut down and redundancy operation

are configurable via the PC Service Tool.