WOODWARD SPM-A Synchronizer Module (Part Number: 9907-028 Rev. D)
The WOODWARD SPM-A Synchronizer Module (9907-028 Rev. D) is a critical component for synchronization and load-sharing in multi-generator or multi-engine systems. The SPM-A module is designed to ensure that multiple generators operate in parallel without any synchronization issues, providing stable and reliable electrical power. This module helps maintain accurate frequency, voltage, and phase angle coordination, ensuring smooth and efficient system performance in power generation and distribution systems.
The SPM-A Synchronizer is primarily used in applications where multiple power generation units, such as diesel or gas engines, need to operate in parallel while sharing the load. This is particularly important in power plants, marine systems, industrial facilities, and other applications where uninterrupted and stable power supply is essential.

Key Features:
- Synchronization Control: Ensures that generators or engines are synchronized with each other in terms of frequency, voltage, and phase angle before connecting to the grid or to each other.
- Load Sharing: Allows multiple generators to share the load efficiently, preventing any individual unit from being overloaded.
- Phase-Lock Loop (PLL): Uses advanced PLL technology for precise synchronization, ensuring smooth transitions and minimal disruption during load changes or system startup.
- Manual or Automatic Operation: Can be configured for both manual and automatic operation modes, providing flexibility for different operational scenarios.
- Speed and Voltage Regulation: Provides precise control of engine speed and voltage, ensuring optimal performance during synchronization.
- Real-Time Monitoring: Provides continuous monitoring of synchronization parameters, ensuring that any issues are immediately detected and corrected.
- Compact and Durable Design: Designed to withstand harsh industrial environments, with a rugged enclosure for long-term reliability in demanding conditions.
- Flexible Communication: Offers compatibility with various industrial communication protocols, such as Modbus, for easy integration into existing control systems.
- Compatibility: Compatible with a wide range of Woodward’s other products, such as digital governors and load control systems, ensuring a seamless integration into complex power generation systems.
Technical Specifications:
- Part Number: 9907-028 Rev. D
- Function: Generator Synchronization & Load Sharing
- Input Voltage: 24V DC (nominal)
- Operating Temperature: -20°C to +70°C (-4°F to 158°F)
- Dimensions: 168 mm x 121 mm x 35 mm (6.6 in x 4.8 in x 1.4 in)
- Weight: 0.6 kg (1.3 lbs)
- Power Consumption: 10W (typical)
- Communication Protocols: Modbus, discrete I/O
- Frequency Range: 50/60 Hz systems
- Mounting: DIN rail or panel mount
- Enclosure Rating: IP20 (dust protected)
- Insulation Class: F (155°C)
- Certifications: UL, CE, RoHS
Key Functional Capabilities:
- Precise Synchronization: The SPM-A Synchronizer module ensures that the generators or engines are in perfect sync with each other, both in terms of frequency and phase angle. This prevents out-of-phase conditions that could cause damage to the system or lead to inefficient operation.
- Load Sharing: When multiple generators are running in parallel, the SPM-A ensures that the load is shared evenly among the generators based on their rated capacity. This prevents individual units from being overloaded and enhances the overall system’s reliability.
- Speed Control: The module can regulate the speed of the engines to ensure stable synchronization and smooth transitions when starting or shutting down the generators.
- Voltage Control: In addition to speed synchronization, the SPM-A module can also monitor and control voltage to ensure that the generators are providing stable and consistent voltage levels.
- Fault Detection: The module continuously monitors synchronization parameters and generates alerts or alarms when any parameter falls outside of acceptable ranges, allowing for quick corrective action.
Applications:
The WOODWARD SPM-A Synchronizer Module is used in a variety of applications, including:
- Power Plants: Ensures smooth synchronization of multiple generators in power plants, facilitating continuous power supply and optimal load sharing between units.
- Marine Applications: Used in marine power generation systems to synchronize multiple engines or generators, ensuring stable and uninterrupted power supply on ships and offshore platforms.
- Industrial Facilities: Ensures parallel operation of backup and primary generators in industrial settings, enhancing operational efficiency and ensuring that systems remain operational during power failures.
- Telecommunications: Ensures that backup generators are synchronized and ready to provide power in case of utility failure.
- Data Centers: Used in data centers to synchronize backup generators, ensuring that they are ready to provide seamless power during outages.
- Military & Aerospace: Critical in military and aerospace applications where precise synchronization and load sharing are needed for backup power systems.
Installation & Maintenance Instructions:
- Installation:
- Mounting: The SPM-A module can be mounted on a standard DIN rail or directly in a control panel. Ensure adequate space for ventilation and accessibility.
- Electrical Connections: Connect the 24V DC power supply to the module. Then, wire the module to the synchronization system, following the wiring diagram provided in the manual.
- Communication Setup: If using Modbus or other communication protocols, connect the necessary communication cables to facilitate data exchange between the SPM-A module and the control system.
- Sensor Integration: Connect voltage and frequency sensors to the module to provide feedback for synchronization and load sharing.
- Maintenance:
- Inspection: Regularly inspect the SPM-A module for dust or debris buildup, which could affect performance. Clean the unit using a soft, dry cloth.
- Wiring Check: Ensure all wiring connections are secure and show no signs of wear or damage. Tighten any loose connections.
- Firmware Updates: Check for any firmware or software updates from Woodward to improve functionality or address system bugs.
- Testing: Periodically test the synchronization and load-sharing functions by running the system under normal operating conditions. Ensure that the module is properly coordinating the generators and that no synchronization issues occur.
- Diagnostic Monitoring: Use the module’s diagnostic features to monitor its performance. If any alarms or faults are detected, troubleshoot and resolve the issue according to the user manual.
Product Recommendations:
If you’re considering the WOODWARD SPM-A Synchronizer Module or need additional synchronization or load-sharing solutions, here are a few similar products that may suit your application:
| Product | Description | Link |
|---|---|---|
| Woodward SPM-2 Synchronizer Module | A more advanced synchronizer for multi-generator systems with enhanced features for large-scale applications. | Woodward SPM-2 |
| Siemens SITRANS FM | A flexible, advanced generator synchronization system from Siemens. | Siemens SITRANS FM |
| Schneider Electric Masterpact MTZ Circuit Breaker | Includes synchronization and load-sharing functions, integrated with Schneider Electric’s advanced control systems. | Schneider Electric MTZ |
Advantages of the WOODWARD SPM-A Synchronizer Module:
- Reliable Synchronization: The SPM-A ensures precise synchronization of multiple generators, minimizing the risk of faults or equipment damage.
- Efficient Load Sharing: By evenly distributing the load, the module prevents overloads on individual generators, optimizing the performance and lifespan of the system.
- Ease of Integration: The SPM-A module is designed to work seamlessly with other Woodward control products and integrates easily with existing systems.
- Real-Time Monitoring and Diagnostics: Provides continuous feedback on system performance, allowing for prompt identification and resolution of any synchronization or load-sharing issues.
- Rugged and Durable: The SPM-A is designed to perform reliably in harsh industrial and marine environments, offering long-term durability.
Conclusion:
The WOODWARD SPM-A Synchronizer Module (9907-028 Rev. D) is a highly reliable and versatile solution for ensuring the smooth synchronization and efficient load-sharing of multiple generators or engines in parallel operation. Its precision, ease of integration, and real-time monitoring capabilities make it an essential tool for power generation systems in a variety of industries, from industrial facilities to marine and military applications. The SPM-A ensures that generators remain in sync, maintaining stable power output while preventing overloading and improving overall system efficiency.

