Woodward 8280-501 (723/723PLUS Digital Speed Control Controller) Complete Information
I. Basic Information
Brand: Woodward (USA)
Component Model: 8280-501, belongs to the 723 / 723PLUS Digital Generator / Turbine Speed Control Controller series
Product Status: The original factory has discontinued production. A large number of units are in use in thermal power plants, gas power plants, ship power, and oil and gas compression units. Market spare parts are mainly composed of disassembled test pieces, refurbished pieces, and inventory spare parts.
Enclosure: Reinforced metal chassis, suitable for installation in hazardous areas, with excellent EMI electromagnetic shielding performance
Core Electrical Parameters Table
Project Parameter Details
Power Supply 18–40 VDC (compatible with 24V DC control power supply for the unit)
Nominal Power Consumption 40W
Actuator Drive Output 0–200 mA, directly drives electro-hydraulic actuators / fuel actuators
Operating Temperature -40℃ ~ +70℃, suitable for harsh environments in the engine room and outdoor cabinets
Storage Temperature -55℃ ~ +105℃
Overall Dimensions 41.28cm (width) × 29.21cm (depth) × 6.04cm (height) (16.25×11.5×2.375 inches)
Overall Weight < 7 pounds (approximately 3.2kg)
Communication and I/O Configuration
Serial Communication Interface
2 configurable serial ports, supporting RS232 / RS422 / RS485; can be connected to computer debugging software, upper-level DCS/SCADA, handheld programmer
Supports LON Talk bus, can be connected to thermocouples, RTD thermoresistors, analog / switch quantity remote IO modules Analog input
4 Analog Input Channels, supporting 4-20mA / 1-5V signals, for collecting process parameters such as power, pressure, and temperature
Switching Output
3 C-type Relay Outputs, used for alarms, fault tripping, and status indication
Programming and Debugging
Parameters can be locally set using the Woodward dedicated handheld programmer; an internal power-off permanent memory ensures that configurations and settings are not lost upon power failure
Support for GAP programming, allowing for custom control logic and cascading control strategies
Core Control Functions (Speed Control + Grid Connection)
Closed-loop Speed Control
The speed control accuracy can reach ±0.25% of the rated speed; built-in torsional vibration filter and notch filter eliminate low-frequency oscillations of the engine / coupling
Supports PID control throughout the start-up, acceleration, idle, and rated speed stages, with two sets of PID dynamic parameters for start-up conditions and load conditions
Grid Connection Control Mode
Droop Mode: Frequency modulation with a differential based on the active power signal
Synchronous Load Distribution: Soft loading / soft unloading of multiple units in parallel, and automatic tripping upon completion of unloading
MW Active Power Control: Precisely control the output active power of the units, smoothly increase and decrease load
Supporting functions
Unit start-stop logic, overspeed protection, fault self-diagnosis, operation event recording
Can be paired with an automatic synchronizer and AVR excitation regulator to complete complete grid connection control of the generator set
Typical Application Scenarios
Diesel / Gas Generator Sets (Plant Power Supply, Emergency Power Supply, Islanded Operation)
Main Propulsion for Ships, Auxiliary Power Supply System for Ships
Gas Engine Driven Compressor, Oil and Gas Field Booster Units
Small Steam Turbines, Industrial Turbine Speed / Load Control
Self-Provided Power Station, Distributed Energy Station Generator Set Speed Control
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