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Product Introduction
The Woodward 9907-186 Load Sharing Module is an advanced analog controller specifically designed to manage and distribute electrical load across multiple generator sets operating in parallel. By producing a torque bias signal, the module ensures that power is evenly shared among generators, maintaining system stability and extending equipment life.
Renowned for its reliability and simplicity, the 9907-186 is part of Woodward’s trusted lineup of analog control solutions. It plays a pivotal role in preventing load imbalances that could otherwise lead to generator damage or operational inefficiency. With its robust metal enclosure and wide environmental operating range, the 9907-186 is perfectly suited for use in harsh industrial and remote environments.
This module integrates easily into legacy and modern generator systems where analog load sharing is required, offering dependable performance without the need for software configuration.
Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | Load Sharing Module |
| Model Number | 9907-186 |
| Manufacturer | Woodward, Inc. |
| Primary Function | Load sharing and synchronization |
| Power Supply Input | 18–32 V DC (nominal 24 V DC) |
| Current Consumption | Less than 250 mA |
| Load Share Line Impedance | 500 Ohms typical |
| Output Type | ±5 V DC torque bias signal |
| Interface | Analog signal interface |
| Mounting Type | Panel mount / DIN rail compatible |
| Operating Temperature | –40 °C to +85 °C |
| Storage Temperature | –55 °C to +105 °C |
| Protection Features | Reverse polarity protection, EMI shielding |
| Enclosure Type | Coated metal housing |
| Certifications | CE, UL, RoHS |
| Dimensions (W × H × D) | 250 × 160 × 50 mm |
| Weight | 1.2 kg |
Product Applications
The 9907-186 Load Sharing Module is suitable for any application requiring precise control of parallel generator operation, including:
-
Power Generation Plants
Ensures balanced output between base and peak load generators. -
Marine Power Systems
Used onboard ships for coordinated sharing between propulsion and auxiliary generators. -
Industrial Generator Banks
Distributes electrical load evenly across large diesel or gas generators in process industries. -
Off-Grid Installations
Maintains synchronization and load balance in isolated microgrids or field deployments. -
Emergency Power Systems
Provides seamless load transition during power outages or failures in backup systems. -
Oil & Gas Installations
Supports stable operation of generators in remote or extreme environmental conditions.
Product Advantages
-
Stable Load Distribution
Delivers reliable torque bias signals to maintain proportional load sharing. -
No Software Required
Hardware-based control makes it simple to install, configure, and maintain. -
Field-Proven Reliability
Trusted in diverse environments—from data centers to offshore platforms. -
Compact, Durable Design
Metal enclosure protects against EMI and harsh environmental effects. -
Wide Operating Range
Performs reliably from –40 °C to +85 °C for all-season use. -
System Protection
Helps reduce wear and tear on generators by avoiding load spikes and imbalances.
Frequently Asked Questions (FAQ)
-
Q: What is the primary function of the Woodward 9907-186?
A: It manages load sharing between multiple generators running in parallel by sending torque bias signals. -
Q: Is the 9907-186 suitable for both new and legacy systems?
A: Yes, it is compatible with analog control systems and many Woodward governors. -
Q: Does this module support digital communication protocols?
A: No, it uses analog signals and is not natively compatible with digital bus protocols. -
Q: What kind of output does the 9907-186 produce?
A: It produces a ±5 V DC torque bias signal used for adjusting load sharing. -
Q: What voltage is required to power this module?
A: It operates on 18–32 V DC, typically sourced from a 24 V power system. -
Q: Can this unit be used in marine environments?
A: Yes, its robust and EMI-protected design makes it suitable for maritime applications. -
Q: What happens if a generator fails during operation?
A: The system will respond based on governor and system settings; the 9907-186 itself does not provide fault handling but ensures load distribution. -
Q: Is reverse polarity protection included?
A: Yes, to prevent damage during installation or maintenance. -
Q: Does it require software for setup?
A: No, setup is done through wiring and voltage tuning—no software is needed. -
Q: What is the expected service life of this module?
A: With proper environmental conditions, it can operate reliably for 10+ years.
Related or Compatible Models
| Model Number | Description | Function | Compatibility |
|---|---|---|---|
| 9907-167 | Load Sharing Module | Analog load sharing | Similar function; variant version |
| 9907-175 | Standard Load Sharing Module | Load sharing | Commonly used analog controller |
| 2301A | Speed/Load Sharing Controller | Dual-function control | For engines and gensets |
| 9905-840 | Speed Control and Load Sharing Module | Speed + torque control | Works with electronic governors |
| DSLC II (8440-2088) | Digital Synchronizer and Load Controller | Synchronization + load | Digital replacement option |
| 8237-124 | Distribution Interface Module | Signal interface | Used in analog systems |
Popular Woodward Models (Same Brand)
| Model Number | Description | Category | Common Use Case |
|---|---|---|---|
| EASYGEN-3500XT | Generator Set Controller | Genset Control | Parallel operation & protection |
| 2301D Digital | Load Sharing & Speed Control | Engine Controller | Industrial engines |
| 505XT | Steam/Gas Turbine Controller | Turbine Control | Oil, gas, and energy sectors |
| SPM-D2 | Synchronizer for Generator Applications | Synchronization Module | Gen-bus synchronization |
| Atlas-II | Engine Control Platform | Large Engine Controller | High-power reciprocating engines |
| ProAct II Actuator | Integrated Actuator & Controller | Actuation + Control | Diesel/gas engine regulation |
