Key Technical Specifications
| Parameter | Detail |
|---|---|
| Product Type | Load sharing and speed control module |
| Manufacturer | Woodward |
| Model | 9907-018 |
| Associated Controller Family | 2301A |
| Prime Mover Types | Diesel engines, gas engines, steam turbines, gas turbines |
| Control Modes | Isochronous and droop |
| Speed Setting Input | 4–20 mA or 1–5 Vdc |
| Actuator Output | 0–200 mA |
| Power Consumption | ≤15 W |
| Dimensions | 15.25 × 7.125 × 2.5 in |
| Weight | 1.758 kg |
| Typical Use | Generator speed control, load sharing, turbine or engine-driven generator control |
Product Introduction
The Woodward 9907-018 is a 2301A-series load sharing and speed control module used with diesel engines, gas engines, steam turbines, and gas turbines. It controls generator speed and load distribution by driving a proportional actuator that positions the fuel-metering device.This module supports isochronous control for constant speed operation and droop control for load-dependent speed control. It accepts 4–20 mA or 1–5 Vdc speed setting signals and provides a 0–200 mA output for compatible Woodward actuators. Because some 2301A hardware is available in low-voltage and high-voltage versions, the exact power supply requirement must be verified from the physical nameplate before installation.
Installation & Configuration Guide
Preparation — about 10 minutes
- Lock out and tag out the prime mover, generator, actuator, and control power.
- Photograph the existing 9907-018 nameplate, wiring, actuator connections, and mounting position.
- Confirm whether the replacement is a low-voltage or high-voltage 2301A model.
- Verify actuator type, current/potential transformer ratios, speed sensor wiring, and control mode.
- Prepare a multimeter, insulated tools, ESD precautions, and the required DC or AC power supply.
Removal — about 5–10 minutes
- Disconnect all control wiring and label each connection.
- Remove actuator output wiring.
- Disconnect speed setting inputs if applicable.
- Unmount the module from the panel.
- Keep fasteners and wiring labels organized.
Installation — about 10 minutes
- Mount the 9907-018 in the same panel location or an equivalent ventilated position.
- Reconnect actuator wiring to the correct output terminals.
- Reconnect speed setting inputs, speed sensors, load sensing inputs, and control power.
- Confirm the power supply matches the module voltage model.
- Do not energize until all wiring, grounding, and mechanical linkages are verified.
Power-On & Test — about 10 minutes
- Apply control power and check for normal indication.
- Verify speed setting response from 4–20 mA or 1–5 Vdc input.
- Confirm actuator movement and correct fuel rack or valve positioning.
- Test isochronous or droop mode as required by the application.
- Run a no-load test before connecting to production load.
Troubleshooting Quick Reference
| Symptom | Most Likely Cause | First Check |
|---|---|---|
| No power indication | Wrong supply voltage or open fuse | Measure control power at the module terminals |
| Engine or turbine will not reach set speed | Speed setting signal missing or actuator fault | Check 4–20 mA / 1–5 Vdc input and actuator wiring |
| Unstable speed | Poor tuning, loose feedback, or load fluctuation | Inspect speed sensor, feedback wiring, and load conditions |
| Load sharing error | Incorrect droop setting or CT/PT wiring | Verify load sensing inputs and droop configuration |
| Actuator does not move | Output circuit fault or actuator mismatch | Measure 0–200 mA output and check actuator continuity |
| Intermittent control | Loose terminal, damaged cable, or EMI | Tighten terminals and check cable routing near power conductors |
Dimensions, Mounting & Wiring Notes
- Dimensions: 15.25 × 7.125 × 2.5 in
- Weight: 1.758 kg
- Mounting: Panel-mounted sheet-metal chassis installation
- Wiring Notes: Confirm actuator output polarity, speed setting input type, and control power rating before connection.
- Important: Do not assume low-voltage and high-voltage 2301A modules are interchangeable. The wrong power supply can damage the module or connected equipment.
FAQ
Is the Woodward 9907-018 a standalone controller?
It is a 2301A-series load sharing and speed control module. It is normally used with a proportional actuator, speed sensing, and load sensing to control a diesel, gas, steam, or gas turbine-driven generator.What control modes does it support?
It supports isochronous control for constant speed and droop control for load-dependent speed control.Can I replace another 2301A module with 9907-018?
Only after verifying the voltage model, power supply, actuator type, wiring, and control configuration. The model number alone is not enough to confirm compatibility.I don’t have the nameplate. Can I still install it safely?
That is risky. Without the nameplate, you cannot confirm whether it is a low-voltage or high-voltage unit, or whether the power supply, actuator, and wiring are correct.What is the most common installation mistake?
Connecting the wrong power supply or assuming the actuator wiring is universal. Always verify the 0–200 mA actuator output wiring and control power rating before energizing.Is this module suitable for generator load sharing?
Yes. The 2301A 9907-018 is used for load sharing and speed control on generator sets driven by diesel, gas, steam, or gas turbine prime movers.
