Woodward 9907-031 723 Series Digital Engine Speed Regulator

The Woodward 9907-031 723 Series Digital Engine Speed Regulator is a precision control unit designed for accurate engine speed management in industrial and power generation applications. Operating on low-voltage input (18–32 V DC) with a maximum power consumption of 40 W, it delivers efficient and reliable performance. The regulator provides proportional actuator output for precise control of engine components, while communication interfaces including RS-232 and RS-485 enable seamless integration into automated systems. Engineered for extreme conditions, it operates reliably from –40 °C to +70 °C (–40 °F to +158 °F) and can be safely stored between –55 °C and +105 °C (–67 °F to +221 °F), ensuring dependable operation in demanding environments.As part of the well‑established 723 digital control family, the 9907-031 integrates electronic speed regulation with built‑in logic flexibility for smooth acceleration, load changes, and stable engine operation under varying conditions.

Model: 9907-031
Product Family: Woodward 723 Series Digital Engine Speed Regulator
Control Type: Digital speed regulator / governor controller
Power Supply: 18–32 V DC nominal (typically 24 V DC)
Speed Sensor Inputs: Magnetic pickup (MPU) / proximity switch inputs
Control Outputs:

• Analog output (0–20 mA) for actuator control
• Discrete output for alarms or lockout status

Feedback Sampling Rate: High‑frequency digital sampling for responsive control loops
Operating Temperature: –20 °C to +70 °C
Storage Temperature: –40 °C to +85 °C
Communication: Optional digital bus expansion via LinkNet™ or CAN open nodes (with additional modules)
Panel Mounting: Designed for control cabinet installation
Power Consumption: 40 W

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Q1: What role does the Woodward 9907-031 play in an engine control system?
A1: The Woodward 9907-031 723 Series Digital Engine Speed Regulator manages engine speed by processing real‑time feedback and adjusting actuator outputs, replacing older mechanical governors with precise digital control.
Q2: What types of speed sensors can the 9907-031 work with?
A2: The 9907-031 is compatible with both magnetic pickup (MPU) sensors and proximity switch speed inputs, providing flexibility in field installations.
Q3: Can this regulator interface with other control modules?
A3: Yes - when expanded with additional network modules, the 9907-031 can be integrated into larger control systems using LinkNet™ or other digital node interfaces.
Q4: What type of output does the digital controller provide for engine actuation?
A4: The controller outputs analog control signals (e.g., 0–20 mA) for proportional actuators or electronic governor valves, and has discrete outputs for alarm and status signals.

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• High-Speed RPM Governance:The 9907-031 serves as a precision-engineered governor, utilizing advanced digital processing to eliminate frequency drift and maintain a rock-solid engine speed even during sudden, heavy load applications.
  
• Dynamic Response Tuning:The internal algorithms of the 9907-031 are built to adapt to the specific inertia of your prime mover, providing a smooth and stable fuel-rack response that minimizes mechanical wear and prevents overspeed oscillations.
• Command and Actuation Precision:Through its dedicated analog output channels, the 9907-031 provides linear and accurate control signals to proportional actuators, allowing for microscopic adjustments in fuel or steam delivery for optimal combustion efficiency.
• Integrated Safety and Alarm Logic:The 9907-041 (Note: Corrected to 9907-031) features a comprehensive suite of discrete outputs that provide real-time status updates to the master control panel, including dedicated triggers for overspeed trips and sensor failure alerts.
• System-Wide Connectivity:Beyond standalone speed control, the 9907-031 is fully capable of integrating into complex Woodward LinkNet networks, allowing it to share critical telemetry with synchronizers and load-sharing modules for total plant automation.

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