WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
3. Key Technical Specifications
| Parameter | Specification Value |
| Manufacturer | Woodward |
| Part Number | 9907-029 |
| Control Series | 2301A Load Sharing & Speed Control |
| Operating Input Voltage | 18–40 VDC (24 VDC nominal) |
| Power Consumption | 5 W nominal |
| Action Type | Forward-acting (increased output current increases fuel/steam) |
| Speed Sensor Input | Magnetic Pickup Unit (MPU) signal (1.0 to 30 VRMS) |
| Actuator Driver Output | 0–200 mA signal to hydraulic or electric 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 internal control panel mounting |
4. Product Introduction & Supply Chain Strategy
The Woodward 9907-029 is a 24 VDC forward-acting 2301A load sharing and speed control module designed to govern speed and load distribution for prime movers such as industrial steam turbines, gas turbines, and diesel engines. Processing frequency signals from a magnetic pickup (MPU), the 9907-029 delivers a precise 0–200 mA output signal to position governor actuators, keeping grid frequency stable and balancing kilowatts across multi-generator configurations.
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 New Surplus 9907-029 on-site protects your facility from long factory lead times on legacy governor components and guards against sudden plant trips. Refurbished speed controllers often feature internal component wear, dried-up capacitors, or oxidized potentiometers that introduce speed oscillations and frequency drift. Investing in genuine New Surplus hardware guarantees original circuit tolerances, zero terminal pin wear, and total operational reliability.
9907-029
9907-029
9907-029
5. Installation & Configuration Guide
1.Pre-Installation Preparation & Safety:Enforce LOTO on power and engine starter circuits.
Apply full Lockout/Tagout (LOTO) to the engine starter system and 24 VDC control power source to prevent accidental cranking. Strap on an ESD-grounded wrist strap before handling module terminals. Document and photograph existing field wiring connections for reference.
2.Legacy Component Removal:Label and disconnect field wires before chassis removal.
Systematically disconnect all field wiring from the terminal screw blocks, including MPU sensor cables, power lines, load sensor inputs, and actuator drive wires. Remove the corner mounting screws from the baseplate chassis and extract the old module from the panel enclosure.
3.Mechanical Mounting & Trim Calibration:Mount new module and mirror dial potentiometer settings.
Bolt the new 9907-029 securely into the cabinet chassis. Measure the exact physical positions of all tuning potentiometers (Rated Speed, Gain, Stability, Actuator Compensation) on the old unit and mirror those settings onto the new 9907-029 as an initial calibration baseline. Securely terminate all field wires.
4.Power-On & Commissioning:Verify MPU voltage levels and tune dynamic response.
Energize the 24 VDC power rail and verify correct supply voltage and polarity. Crank the engine and check that the MPU signal reads at least 1.5 VRMS. Once running at rated speed, fine-tune the Gain and Stability potentiometers to achieve a smooth, stable recovery following sudden step-load shifts.
6. Firmware/Software Versions & Upgrade Notes
- Hardware Architecture: The 9907-029 uses an analog control circuit; it does not utilize firmware, flash memory, or digital configuration software.
- Operating Voltage Notice: Ensure your supply power is within the 18–40 VDC range. Do not connect high-voltage AC (120/240 VAC) directly to the 9907-029, as high voltage will instantly destroy the low-voltage internal components.
- Action Type Verification: The 9907-029 is a forward-acting control unit. Verify that your actuator setup requires an increasing milliamp signal to open the fuel rack (forward-acting) rather than a reverse-acting signal profile.
7. Frequently Asked Questions (FAQ)
Q: Is this Woodward 9907-029 speed control New Surplus or refurbished?
A: This unit is 100% Brand New Surplus stock. It has never seen active duty on an engine or turbine assembly, exhibits zero terminal pin degradation, and is preserved in original protective packaging.
Q: Why choose New Surplus over a refurbished governor control?
A: Analog governor controls depend on precise electronic component tolerances. Refurbished boards frequently suffer from aged capacitors and worn potentiometer contacts that cause speed hunting, load imbalances, or random tripping. A speed controller failure can lead to catastrophic overspeed events or severe engine damage. Buying New Surplus ensures full original service life and protects critical plant assets.
Q: What does “forward-acting” mean for the 9907-029 control?
A: Forward-acting means that as the controller demands more fuel or steam to handle an increasing load, its output current increases (e.g., from 0 mA up toward 200 mA). Make sure your governor actuator matches this control logic.
Q: How do I eliminate engine speed hunting during setup?
A: Engine speed hunting is resolved by adjusting the Gain and Stability potentiometers. Turn the Gain potentiometer counter-clockwise to reduce sensitivity, then adjust Stability clockwise until the frequency output stabilizes under both loaded and unloaded states.
Q: What warranty is included with this New Surplus Woodward component?
A: This Woodward 9907-029 control module comes with a full 1-year replacement warranty protecting against hardware defects and operational failures.
