Woodward 9907-018 – Load Sharing & Speed Control for Gensets and Industrial Engines

The Woodward 9907-018 is a 2301A-series speed control designed for precise engine governing and reliable load sharing across paralleled generator sets. It’s the kind of analog controller that technicians reach for when they want steady isochronous speed, clean kW sharing, and a straightforward setup without a laptop.

From my experience, this model fits well in retrofit and upgrade projects where you need dependable control, minimal downtime, and compatibility with standard 0–200 mA electric actuators. You might notice it’s especially practical in applications where stable frequency and quick response to load transients matter.

• Isochronous and droop control – Supports tight frequency regulation or intentional droop for paralleled operation.

• Load sharing capability – Shares kW via the standard analog load sharing line, typically reducing circulating current and mismatch issues.

• MPU speed input – Accepts a magnetic pickup signal for robust and noise-resistant speed sensing.

• Actuator drive (0–200 mA) – Drives Woodward proportional electric actuators commonly used on diesel and gas engines.

• Analog tuning – On-board trimpots for gain, stability, and droop; no software required, which in many cases speeds up commissioning.

• Retrofit-friendly form factor – Typically panel or backplate mounted, making it simple to drop into existing cabinets.

• Proven field reliability – The 2301A lineage is widely used in power gen and oil & gas, so spare parts and know-how are easy to source.

• Prime and standby generator sets on industrial sites and healthcare facilities

• Oil & gas compressor packages and pump drives where stable RPM is critical

• Marine auxiliary gensets and propulsion support systems

• Mining and construction power modules that need simple, serviceable controls

• Retrofits replacing aging governors with a clean analog 2301A solution

A supervisor at a power rental fleet mentioned the 9907-018 “settled faster on load steps than the old unit,” and the team appreciated that tuning was intuitive. That seems to be a recurring theme in the field.

• Reliability under real-world conditions – Stable governing in most cases even with electrical noise and variable loads.

• Compatibility – Works with standard Woodward proportional actuators and typical MPU speed pickups, easing spares management.

• Lower lifecycle cost – No software licenses; quick field tuning often reduces commissioning time.

• Procurement confidence – Long-running 2301A platform means predictable lead times and broad service know-how.

• Cabinet & environment – Install inside a clean, dry, ventilated control cabinet (NEMA/IEC equivalent). Keep clear of high-vibration or high-heat zones.

• Power & wiring – Use a clean 24 Vdc supply (fused). Route the MPU cable separately from high-voltage lines and use shielded twisted pair with proper grounding.

• Actuator loop – Verify actuator current range (typically 0–200 mA) and confirm linkage is free from binding before tuning.

• Tuning – Start with conservative gain/stability settings; step-load the generator and trim for response without overshoot.

• Routine checks – Inspect connectors, verify speed pickup gap per sensor spec, and re-validate droop/isochronous settings after major service.

• Spares – Keep an MPU and actuator on hand; they’re the most common wear/field-replace items around this controller.

• CE marking – Conforms to applicable EMC and safety directives for industrial controls.

• UL/cUL or CSA (variant-dependent) – Many 2301A builds carry North American safety approvals; confirm on the unit nameplate.

• ISO 9001 manufacturing – Produced under certified quality systems.

• RoHS (current production) – Compliance may apply to current builds; legacy spares can vary by date code.

• Warranty – Standard manufacturer’s warranty terms apply; we typically see 12 months from commissioning or 18 months from shipment, whichever comes first.