WOODWARD 9907-1200 – Digital Speed/Load Control for Engine and Turbine Applications

The WOODWARD 9907-1200 is commonly used as a digital governor/speed control module for prime movers—diesel and gas engines, as well as small steam or gas turbines. From my experience, it’s typically applied where tight isochronous speed control, load sharing, and reliable actuator drive are required. If you’re replacing an older governor or upgrading a genset control panel, this part number often drops in with minimal wiring changes, which saves time on commissioning.

Company’s Order Placement Process and Guarantees

• Warranty period: 365 days
• Delivery time: 1 week for in-stock items; no more than one month at the latest
• Payment method: 50% advance payment, full payment before delivery
• Express delivery: FedEx, UPS, DHL

Key Features

• Closed-loop speed control – Maintains stable RPM in isochronous or droop mode to keep your setpoints steady under varying load.
• Load sharing and paralleling – Works with standard load-share lines so multiple gensets can split kW smoothly without hunting.
• Standard MPU speed input – Accepts a typical magnetic pickup for reliable speed feedback on flywheels or gear teeth.
• Actuator drive output – Provides a proportional current output for common electric actuators, enabling precise fuel/steam valve positioning.
• 24 Vdc control power – Usually powered from a 24 Vdc panel supply, which simplifies retrofit into existing cabinets.
• Built-in protections – Overspeed shutdown, loss-of-signal handling, and configurable limits to safeguard the prime mover.
• Service/configuration port – Supports parameter setup and fine-tuning with a laptop or handheld tool; you might notice commissioning goes quicker than expected.
• Industrial temperature design – Suited to cabinet-mounted environments found in power, marine, and process plants.

Technical Specifications

Application Fields

This controller is typically selected for:

• Generator sets running in island or parallel with utility
• Mechanical drive packages: pumps, compressors, blowers
• Marine propulsion and auxiliary engines
• Small gas/steam turbines used for process power or cogeneration

One thing I appreciate is how forgiving the tuning usually is—most teams get stable load acceptance with modest gain changes. A power plant client mentioned that swapping in a 9907-1200 reduced start-up time because the MPU input and actuator wiring matched their existing harness.

Advantages & Value

• Reliability – Woodward controls are known for long service life and stable control loops in tough environments.
• Compatibility – Works with standard MPUs and electric actuators; simplifies retrofit projects and reduces re-engineering.
• Cost savings – Faster commissioning and fewer nuisance trips often translate to lower downtime costs.
• Technical support – Documentation and field expertise are widely available, which in many cases shortens troubleshooting cycles.

Installation & Maintenance

• Cabinet standards – Mount in a clean, dry control cabinet with adequate ventilation; follow spacing to avoid heat build-up near power supplies or VFDs.
• Wiring practices – Use shielded twisted pair for MPU and low-level signals; ground shields at one point to reduce noise. Separate actuator wiring from high-voltage runs.
• Power supply – Provide a stable 24 Vdc source with proper fusing. You might notice smoother performance with a dedicated control-power circuit.
• Commissioning – Verify rotation direction and MPU gap, then set droop/isochronous modes. Record baseline tuning parameters for future reference.
• Routine maintenance – Inspect terminal tightness, clean dust from the cabinet, back up configuration, and review event logs. Firmware updates may be available for certain variants.
• Safety – Confirm overspeed trip and shutdown logic during SAT; always lock out/tag out before actuator linkage work.

Quality & Certifications

• Manufacturer quality system: ISO 9001
• Conformity: CE marking (EMC/Low Voltage) typically applicable to this family
• UL/cUL recognition on many variants; RoHS compliance where applicable
• Standard warranty: 12 months (365 days)

If you’re matching an existing installation, sharing a photo of the front label and terminal map helps confirm whether your 9907-1200 includes specific I/O options. We can also supply complementary parts such as magnetic pickups, electric actuators, and wiring kits to make the retrofit smoother.