Digital guide
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Woodward 8404-505
Product Name: Digital Electronic Speed Governor Controller
Product Introduction: A compact, microprocessor-based digital speed governor designed for small-to-medium bore diesel and gas engines, integrating speed signal sampling, PID operation, and actuator drive functions. It supports single-unit speed regulation and basic protection functions, ideal for standby and prime power applications in industrial and commercial settings.
Detailed content
Technical Specifications:
- Power Supply: 12/24 VDC (8–40 VDC operating range)
- Speed Signal Input: MPU magnetic pickup signal, frequency range 50–15000 Hz
- Control Output: 4–20 mA proportional current drive output
- Control Precision: Steady state speed regulation accuracy ≤±0.5%
- Analog I/O: 4 configurable analog inputs, 2 analog outputs
- Digital I/O: 8 isolated digital inputs, 4 relay outputs
- Operating Temperature: -20 °C to +70 °C
- Protection Grade: IP30 (panel-mounted)
Functional Features:
- Adaptive PID algorithm automatically matches engine dynamic characteristics
- Support isochronous constant speed control and droop speed control dual modes
- Built-in overspeed, undervoltage, overcurrent, and reverse connection comprehensive protection
- On-site adjustable speed gain, dynamic stability, and static droop parameters
- With soft start control function to eliminate unit startup mechanical impact
- Complete fault self-diagnosis and fault code storage function
- Compact design for panel or DIN rail mounting
Application Scenarios:
- Small industrial fixed speed generator set speed regulation
- Marine auxiliary power engine control
- Oil and gas field small gas compression unit prime mover
- Mining engineering machinery heavy duty diesel engine
- Remote area unattended off-grid power station
