The WOODWARD 9907-247 is a sophisticated 828 Digital Control unit designed for the precise management of reciprocating engines. As a high-speed, microprocessor-based controller, it is engineered to handle complex governing tasks, including speed control, air-fuel ratio monitoring, and system diagnostics. The Revision G update provides enhanced processing stability and refined control algorithms, making it a reliable choice for mission-critical engine applications where performance and emissions compliance are paramount.

 

Product Parameters & Datasheet

The technical specifications for the WOODWARD 9907-247 828 Digital Control are summarized below:

• Part Number: 9907-247
• Model: 828 Digital Control
• Revision: G
• Input Power: 18–40 Vdc (24 Vdc nominal)
• Power Consumption: 15 Watts maximum
• Magnetic Pickup (MPU) Input: 1.0 to 30 Vrms
• Discrete Inputs: 8 Programmable (High/Low side)
• Analog Inputs: 4 Configurable (0–5 V, 4–20 mA)
• Actuator Output: 0–200 mA or 4–20 mA (Software selectable)
• Communication: RS-232 / RS-485 Modbus RTU
• Operating Temperature: -40°C to +70°C

Product Technical Description

The 828 Digital Control utilizes a 32-bit microprocessor to execute real-time control strategies. It features advanced PID (Proportional-Integral-Derivative) control logic that can be tuned for various engine dynamics. The Rev G hardware is built with industrial-grade surface-mount components and enhanced EMI shielding to prevent interference from spark ignition systems or high-voltage switchgear. The unit supports “Watch Window” software, allowing technicians to monitor internal variables and adjust tuning parameters without interrupting engine operation.

 

Application Fields

This digital controller is extensively used in global industrial engine sectors, including:

• Gas Compression: Precise speed and torque control for natural gas compressors.
• Power Generation: Isochronous or droop speed control for standby and prime power gensets.
• Pump Stations: Automated speed regulation for high-capacity fluid transport.
• Marine Power: Managing auxiliary engines and small propulsion units on commercial vessels.

 

Country of Origin

The WOODWARD 9907-247 is manufactured in the United States of America (USA), ensuring compliance with international quality and safety standards for the energy and transportation sectors.

 

Product Usage Instructions

1. Mechanical Installation: Mount the 828 control in a vibration-isolated location within the engine control panel. Ensure there is adequate space for connector access and heat dissipation.
2. Electrical Wiring: Use twisted, shielded pairs for the MPU and analog signal lines. Ground the shields only at the control end to avoid ground loops.
3. Power-Up: Apply 24 Vdc power and verify the status LED sequence. A steady green light typically indicates the CPU is running and the application software is active.
4. Software Configuration: Connect a PC via the serial service port to configure engine-specific parameters such as rated speed, fuel limits, and gain settings.
5. Tuning: While the engine is running at idle, adjust the dynamic gain and reset parameters to achieve a stable speed. Gradually increase load to verify transient response and stability across the entire operating range.