Woodward 9907-671 Digital Speed Controller

Product Brief Introduction The Woodward 9907-671 digital speed controller is a closed-loop governing unit for diesel and gas prime movers. It receives speed pulse feedback and outputs proportional drive signals to control the fuel actuator to maintain stable rotational speed.
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Technical Specifications 24VDC power supply, magnetic pickup speed signal input, proportional actuator drive output. Operating temperature: -40℃ ~ +70℃.

Functional Features PID closed-loop speed regulation, overspeed alarm and trip protection, startup fuel limiting, fault self-diagnosis and power-off parameter retention.

Application Scenarios Land standby generator sets, industrial water pump prime movers and stationary power units.

Performance Parameters Smooth dynamic adjustment, small steady-state speed deviation, good compatibility with different actuators.

Structural Characteristics Compact panel-mounted controller, wiring terminal block, running, alarm and fault LED indicators.

Working Principle The controller converts pulse signals from the magnetic pickup into actual speed values, compares them with the preset speed setpoint, and adjusts output current to change the fuel actuator position.

Installation Requirements Install on a shock-absorbing bracket, use shielded twisted-pair cables for speed sensor wiring.

Usage Notes Calibrate actuator stroke before commissioning, do not modify the overspeed protection threshold arbitrarily.




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