9907-147
May 26, 2026

9907-147

Product Overview Woodward 9907‑147 is a high‑voltage reverse‑acting analog speed‑load & load‑sharing controller of the classic 2301A series, designed for diesel/gas engines, gas/steam turbines and generator sets. It supports high‑voltage power supply, reverse‑acting output logic, precise speed regulation, real‑kW parallel load sharing, overspeed protection and torque limiting, widely used in power generation, marine propulsion, oil‑gas compressors and heavy‑duty industrial prime‑mover control systems.

Description

Core Functions

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

  2. Reverse‑acting logic: Fuel increases as control signal decreases; failsafe to full‑fuel position on power loss, compatible with hydraulic/electro‑hydraulic heavy‑duty actuators.

  3. Analog PID closed‑loop control with startup ramp, actuator stroke limit, load rejection protection and overspeed test function.

  4. High‑voltage power input (88‑132 VAC / 90‑150 VDC), suitable for harsh industrial power supply environments.

  5. Supports real‑kW load sharing signal, 4‑20 mA remote setpoint, and RS‑485 Modbus‑RTU communication for remote monitoring & parameter configuration.

Electrical Specifications

  • Power Supply: 88‑132 VAC / 90‑150 VDC (high‑voltage version)

  • Power Consumption: ≤15 W

  • Speed Input: Magnetic Pickup (MPU), switch‑selectable ranges: 500‑1500Hz / 1000‑3000Hz / 2000‑6000Hz / 4000‑12000Hz

  • Actuator Output: 0‑200 mA proportional current (reverse‑acting)

  • Communication: RS‑485 Modbus‑RTU

  • Operating Temperature: −40 °C ~ +65 °C

  • Storage Temperature: −55 °C ~ +105 °C

  • Certifications: UL Listed E97763, MIL‑STD‑461C, CE, Class I Div 2 hazardous area compliant

Mechanical & Environmental Features

  • Mounting: Front panel‑mount

  • Enclosure: NEMA 4X / IP54 metal housing, dust‑proof, vibration‑resistant, corrosion‑resistant

  • Weight: ~4.4 kg (9.7 lbs)

  • Vibration & shock resistance meets MIL‑STD‑810 standards for marine and industrial harsh environments

Typical Applications

  • Multi‑generator parallel control for thermal power plants and emergency power stations

  • Gas/steam turbine governing and load control systems

  • Marine main engine speed regulation and propulsion control

  • Oil‑gas field compressor engine and prime‑mover control systems


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