9907-077
May 26, 2026

9907-077

Woodward 9907‑077 is a 2301A series electronic governor, designed for diesel/gas engines, steam/gas turbines and generator sets. It performs precise speed regulation, parallel load sharing, overspeed protection and fault monitoring for prime movers used in power generation, petrochemical, oil‑gas and marine heavy‑duty industrial applications.

Description

Core Functions

  1. Dual control modes: isochronous mode for single‑unit constant‑speed operation; droop mode for multi‑unit genset parallel load sharing.

  2. PID closed‑loop control with startup ramp, actuator stroke limit and load rejection protection.

  3. Built‑in overspeed protection, real‑time self‑diagnosis and relay alarm outputs.

  4. 4‑20 mA analog remote setpoint input for connection with DCS/PLC systems.

  5. Forward‑acting control logic for fuel actuator driving.

Electrical Specifications

  • Power Supply: 18–40 VDC (nominal 24 VDC)

  • Speed Input: Magnetic Pickup (MPU) sensor

  • Actuator Output: Proportional current output

  • Communication: RS‑485 Modbus‑RTU

  • Certification: CE certified, industrial anti‑interference

Environmental & Mechanical Features

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

  • Mounting: Panel‑mount installation

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

Typical Applications

  • Speed‑load control for engine & turbine generator sets

  • Petrochemical, oil‑gas compressor prime mover control

  • Marine auxiliary power generation systems

  • Industrial prime mover governing and safety protection systems


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