8904-484
May 26, 2026

8904-484

Woodward 8904‑484 is a high‑performance ProAct Series Digital Electronic Governor (Speed Controller) designed for diesel and gas‑engine‑powered generator sets, marine propulsion engines and industrial prime movers. It provides high‑precision closed‑loop speed regulation, direct PWM drive for fuel‑control actuators, overspeed protection and integrated fault self‑diagnosis. With fast dynamic response, strong anti‑interference capability and wide‑temperature stability, it is widely applied in power generation, oil & gas, mining and heavy‑duty marine environments.

Description

Core Functions

  1. High‑precision closed‑loop speed control to maintain stable frequency under load fluctuations

  2. Direct PWM driving for Woodward fuel‑control actuators

  3. Built‑in overspeed protection, fault diagnosis and alarm output

  4. Supports isochronous mode for single‑unit gensets and droop mode for parallel‑running units

  5. Remote speed setpoint via 4‑20 mA analog input

  6. Parameter configuration using dedicated Woodward PC tuning software

Electrical Specifications

  • Power Supply: 24 VDC (wide‑range input: 18–40 VDC)

  • Speed Input: Magnetic Pickup (MPU) sensor signal

  • Actuator Output: PWM drive signal for fuel‑control actuators

  • Analog Input: 4‑20 mA for remote speed reference

  • Communication: Serial interface for monitoring and parameter adjustment

  • EMC: Industrial‑grade electromagnetic interference resistance

Environmental & Mechanical Features

  • Operating Temperature: −40 °C ~ +85 °C

  • Vibration & Shock: Compliant with marine and heavy‑duty industrial standards

  • Mounting: Panel‑mount installation

  • Enclosure: Rugged metal housing, dust‑proof and shock‑resistant

Typical Applications

  • Diesel & gas engine generator sets

  • Marine auxiliary power and propulsion systems

  • Oilfield, mining and industrial prime movers

  • Continuous‑run and emergency backup power supply systems


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