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3. Key Technical Specifications
| Parameter | Specification Value |
| Manufacturer | Woodward |
| Part Number | 9907-205 |
| Control Series | 2301A Load Sharing & Speed Control |
| Power Supply Input | 18–40 VDC (24 VDC nominal) |
| Power Consumption | 5 W nominal |
| Speed Sensor Input | Magnetic Pickup Unit (MPU) signal (1.0 to 30 VRMS) |
| Control Modes | Isochronous speed control or Droop mode |
| Actuator Output Signal | 0–200 mA output for hydraulic or electric governor actuators |
| Operating Temperature | −40°C to +85°C (−40°F to +185°F) |
| Adjustable Trims | Rated Speed, Idle Speed, Gain, Stability, Actuator Compensation |
| Mounting Architecture | Metal base-plate chassis designed for control cabinet surface mounting |
4. Product Introduction & Supply Chain Strategy
The Woodward 9907-205 is a 24 VDC 2301A load sharing and speed control module designed for accurate speed regulation and kW load distribution on industrial diesel engines, gas engines, and steam turbines. Reading speed signals from a magnetic pickup (MPU), the module drives a 0–200 mA output to position the fuel actuator, maintaining stable steady-state frequency control under varying electrical loads.
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability. Stocking a factory-fresh 9907-205 unit eliminates long factory lead times on legacy governor components and protects your plant against sudden overspeed or load-rejection downtime. Refurbished speed controls frequently contain aged internal capacitors and oxidized potentiometer wipers that cause frequency oscillation or engine hunting under load. Securing genuine New Surplus hardware guarantees original circuit tolerances, zero pin wear, and long-term operational peace of mind.
9907-205
9907-205
5. Installation & Configuration Guide
1.Pre-Installation Preparation & Safety:Enforce LOTO on control power and engine starter.
Apply complete Lockout/Tagout (LOTO) to the engine starter circuit and 24 VDC control power lines. Wear an ESD-grounded wrist strap when handling internal cabinet terminals. Photograph and label all field wiring connections prior to disconnecting the existing controller.
2.Legacy Component Removal:Label field wires and remove mounting hardware.
Carefully unscrew and disconnect wires from the terminal blocks, including MPU input lines, actuator drive leads, power supply connections, and load sharing buses. Remove the chassis mounting screws and set the old unit aside.
3.Mechanical Mounting & Baseline Calibration:Mount unit and replicate potentiometer positions.
Bolt the new 9907-205 module securely into the control cabinet. Measure the physical potentiometer dial positions (Rated Speed, Idle Speed, Gain, Stability, Actuator Compensation) on the original unit and mirror these settings on the new module as a baseline. Reattach all field wiring securely.
4.Power-On & Commissioning:Verify MPU signal voltage and fine-tune dynamic loop.
Energize the 24 VDC power rail and verify correct supply voltage and pin polarity. Crank the prime mover and verify that the MPU signal reads at least 1.5 VRMS. Once running at operating speed, adjust the Gain and Stability potentiometers to achieve a smooth, stable recovery following transient load changes.
6. Firmware/Software Versions & Upgrade Notes
- Hardware Architecture: The 9907-205 uses discrete analog circuitry; it does not utilize firmware, microprocessors, or software programming software.
- Power Input Check: Confirm your power distribution supply falls within the 18–40 VDC operating window. Connecting high-voltage AC directly to the 9907-205 terminals will destroy internal low-voltage components.
- Actuator Drive Output: Verify that the actuator current range jumper matches your specific actuator coil requirement (0–200 mA output range).
7. Frequently Asked Questions (FAQ)
Q: Is this Woodward 9907-205 unit Brand New Surplus or refurbished?
A: This module is 100% Brand New Surplus stock. It has never seen field service, features zero terminal pin degradation, and is preserved in original packaging.
Q: Why choose New Surplus over a refurbished governor control board?
A: Governor controls require exact electronic tolerances to regulate prime mover speed accurately. Refurbished boards often have aged capacitors and worn trim potentiometers that lead to frequency drift, improper load sharing, or severe speed hunting. A governor failure can cause catastrophic overspeed damage to your engine or turbine. Buying New Surplus ensures original factory performance and operational safety.
Q: Can the 9907-205 operate in parallel with other generator sets?
A: Yes. The 9907-205 supports Isochronous Load Sharing when connected to compatible Woodward load sensing modules, as well as standard Droop mode for paralleling with utility grids or generator buses.
Q: How do I resolve engine speed hunting during setup?
A: Speed hunting is resolved by adjusting the Gain and Stability potentiometers. Turn the Gain potentiometer counter-clockwise to reduce system sensitivity, then adjust Stability clockwise until frequency output stabilizes cleanly under loaded and unloaded conditions.
Q: What warranty is provided with this New Surplus Woodward unit?
A: This Woodward 9907-205 speed control module includes a full 1-year replacement warranty covering operational performance and hardware defects.
