The Woodward 723 Digital Control is a high-performance, microprocessor-based controller designed to manage the speed and load of reciprocating engines (diesel, gas, or dual-fuel) and steam turbines. The Revision H model represents a mature, robust iteration of this series, offering enhanced signal processing stability and reliable performance in demanding industrial environments.

 

Product Parameters

• Model Number: 8280-501
• Revision: H
• Input Power: 18–40 VDC (24 VDC nominal); 20 W maximum consumption.
• Speed Signals: Two magnetic pickup (MPU) or proximity switch inputs.
• Analog Inputs: Four configurable inputs (0–5 V, 0–10 V, or 4–20 mA).
• Discrete Inputs: Eight contact inputs, optically isolated.
• Analog Outputs: Three configurable outputs (0–20 mA or 4–20 mA) for actuators or remote monitoring.
• Discrete Outputs: Three relay outputs (form C) for status and alarm signaling.
• Communication: Serial ports supporting RS-232, RS-422, or RS-485 protocols.

Product Datasheet Summary

• Control Precision: Maintains speed stability within ±0.25% of the rated speed.
• Processing Unit: 16-bit high-speed microprocessor for real-time control loops.
• Construction: Rugged aluminum chassis designed for surface mounting; provides excellent EMI/RFI shielding.
• Control Dynamics: Dual-dynamics support (allowing different PID settings for start-up vs. loaded conditions).
• Environmental Rating: Operating temperature range of -40°C to +70°C.

 

Country of Origin

• Manufacturer: Woodward, Inc.
• Origin: United States of America (USA).

 

Application Fields

• Marine Power: Main propulsion and auxiliary power generation systems on vessels.
• Power Generation: Control of generator sets in prime power, standby, or peak-shaving applications.
• Oil & Gas: Management of gas engine-driven compressors and pumps.
• Industrial Steam Turbines: Speed and load control in processing plants and small-scale utilities.

 

Product Usage Instructions

1. Installation: Mount the unit vertically in a protected control cabinet. Ensure the mounting surface is grounded to minimize electrical noise.
2. Wiring: Use shielded, twisted-pair cables for all speed and analog signals. Connect shields only at the control end to prevent ground loops.
3. Configuration: Connect a Woodward Hand-Held Programmer (HHP) or a PC with Watch Window software to the serial port to enter engine-specific parameters (rated speed, gear teeth count, etc.).
4. Tuning: Adjust Proportional, Integral, and Derivative (PID) gains during engine operation to achieve stable transient response.
5. Operation: Monitor the “Status” LED; a solid green light indicates the processor is functioning correctly and the internal self-test has passed.

 

Product Technical Description

The Woodward 723 utilizes sophisticated control algorithms to provide isochronous speed control, droop speed control, and base load control. It features a unique “Dual Dynamics” capability, which allows the controller to automatically switch between two sets of PID parameters based on load or speed triggers, ensuring optimal stability across the entire operating range. The Rev H hardware includes improved input filtering and high-voltage isolation for the discrete inputs, making it highly resilient against electrical surges and industrial interference.

For further information regarding the Woodward 8280-501, please consult the official technical manual for specific wiring diagrams and logic configuration.