Woodward 9904-1533 Product Specification
1. Product Overview
The Woodward 9904-1533 is a high-performance digital governor designed for speed and load control of diesel, gas, and dual-fuel engines, as well as industrial turbines. As a core control component in power generation, marine propulsion, and industrial drive systems, it precisely regulates fuel supply or ignition timing based on real-time speed and load signals, ensuring stable operation of prime movers. Widely applied in emergency generator sets, marine main engines, and industrial cogeneration systems, this governor enhances equipment efficiency, reduces fuel consumption, and improves operational safety.
Compliant with international standards including ISO 8528 and IEC 61508 (SIL 2), the 9904-1533 features a robust microprocessor-based design, flexible configuration options, and excellent anti-interference performance. It maintains reliable operation in harsh environments with temperature fluctuations, vibration, and electrical noise, meeting the stringent control requirements of critical power systems.
2. Technical Parameters & Specifications
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Category
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Details
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Product Model
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Woodward 9904-1533
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Product Type
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Digital Governor (SIL 2 Certified)
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Controlled Prime Movers
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Diesel Engines, Gas Engines, Industrial Turbines
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Speed Control Range
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100–3000 RPM (Adjustable)
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Speed Regulation Accuracy
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±0.1% of Rated Speed (Steady State)
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Input/Output (I/O) Channels
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4 AI (4–20 mA); 4 AO (4–20 mA); 8 DI (24 V DC); 6 DO (24 V DC)
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Communication Protocols
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Modbus RTU/TCP; CANopen; Ethernet/IP
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Control Algorithms
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PID, Lead-Lag Compensation, Load Sharing
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Power Supply
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12/24 V DC ±20%; Power Consumption: ≤15 W
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Environmental Ratings
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Operating Temp: -40°C–70°C; Humidity: 0%–95% (Non-Condensing); Vibration: ≤3 g
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Certifications
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IEC 61508 (SIL 2); ISO 8528; UL 1604; CE; ABS
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3. Key Features
3.1 High-Precision Speed Control
With speed regulation accuracy of ±0.1% of rated speed, the governor maintains stable operation of prime movers even under varying load conditions. The optimized PID algorithm with lead-lag compensation ensures rapid response to speed deviations (response time ≤100 ms), preventing overspeed or underspeed in critical applications like emergency generators.
3.2 SIL 2 Safety Compliance
Certified for SIL 2 operation, the governor integrates built-in fault detection and diagnostics (FDD) with ≥99% coverage. It features emergency shutdown (ESD) and overspeed protection functions, automatically cutting off fuel supply when dangerous conditions occur, ensuring compliance with industrial safety standards.
3.3 Flexible Load Management
The governor supports load sharing and load shedding functions, enabling synchronized operation of multiple generator sets in parallel. It automatically distributes load evenly among units (load imbalance ≤2%), optimizing fuel efficiency and extending equipment lifespan in data center backup power systems and marine power plants.
3.4 Extreme Environment Adaptability
Designed to operate in -40°C–70°C, the governor adapts to extreme cold (arctic marine applications) and high-temperature (desert power plants) environments. Its rugged housing with IP65 protection and 3 g vibration resistance ensures reliable performance in off-road vehicles and offshore platforms.
4. Related Woodward Products
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Woodward 9904-1534: Enhanced digital governor with 8 I/O channels, supporting remote monitoring via 4G LTE for off-grid applications.
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Woodward 505XT: Turbine-specific governor, paired with 9904-1533 for combined cycle power plant control.
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Woodward ProTech-GII: Overspeed protection module, providing redundant safety control for engines governed by 9904-1533.
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Woodward MPC200: Modular process controller, integrating 9904-1533 into centralized industrial control systems.
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Woodward HMI3000: Human-machine interface, enabling parameter configuration and real-time status monitoring of the 9904-1533 governor.
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