9907-838 Power Supply Module

Parameter Name
Parameter Value
Manufacturer Part Number
9907-838
Manufacturer
Woodward Governor Company
Product Type
Power Supply Module
Typical Input Voltage
120/240 VAC, 50/60 Hz (or a specific DC input range; exact spec varies)
Output Voltages
Typically provides multiple isolated DC outputs (e.g., +5VDC for logic, ±15VDC for analog circuits, +24VDC for relays/sensors)
Output Power / Current
Specified in Watts or Amps per output rail (e.g., 5V @ 10A, ±15V @ 1A, 24V @ 2A)
Efficiency
High efficiency design to minimize heat generation
Protection Features
Over-voltage protection (OVP), Over-current protection (OCP), Short-circuit protection, Thermal shutdown
Isolation
Input-to-output and between output rails for noise immunity
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Description

Product Overview

The WOODWARD 9907-838​ is a Power Supply Module​ designed and manufactured by Woodward, a global leader in control solutions for industrial engines, turbines, and other prime movers. This specific module forms a critical component within Woodward’s NetCon​ or related networked control system families, which are extensively used for governing and managing reciprocating engines and compressors in demanding applications. The primary function of the 9907-838​ is to provide stable, regulated, and isolated DC power to the various electronic cards and components within a control system rack or enclosure. It ensures that sensitive control logic processors, I/O modules, and communication interfaces receive clean and reliable power, which is fundamental for the accurate and dependable operation of the entire control system, especially in environments susceptible to electrical noise and voltage fluctuations.
As an integral part of a modular control system architecture, the 9907-838​ is engineered to meet the stringent power quality requirements of industrial control applications. It typically converts incoming AC mains voltage (e.g., 120/240V AC) or a DC input into one or more isolated DC output voltages (commonly +5V, ±15V, +24V) required by the system’s digital and analog circuits. The module incorporates protection features such as over-voltage, over-current, and short-circuit protection to safeguard both the power supply itself and the downstream control electronics. Installing a genuine and properly specified WOODWARD 9907-838​ power supply is a fundamental step in building a robust and failure-resistant control system, as power integrity is the cornerstone upon which all complex control and monitoring functions rely.

Technical Specifications

Parameter Name
Parameter Value
Manufacturer Part Number
9907-838
Manufacturer
Woodward Governor Company
Product Type
Power Supply Module
Typical Input Voltage
120/240 VAC, 50/60 Hz (or a specific DC input range; exact spec varies)
Output Voltages
Typically provides multiple isolated DC outputs (e.g., +5VDC for logic, ±15VDC for analog circuits, +24VDC for relays/sensors)
Output Power / Current
Specified in Watts or Amps per output rail (e.g., 5V @ 10A, ±15V @ 1A, 24V @ 2A)
Efficiency
High efficiency design to minimize heat generation
Protection Features
Over-voltage protection (OVP), Over-current protection (OCP), Short-circuit protection, Thermal shutdown
Isolation
Input-to-output and between output rails for noise immunity
Cooling Method
Convection or forced air cooling, depending on power rating
Mounting
Designed for chassis or DIN-rail mounting within a control cabinet
Operating Temperature Range
-20°C to +70°C (typical for industrial components)
Safety / Regulatory Compliance
UL, cUL, CE marked (as applicable)

9907-838

Main Features and Advantages

The WOODWARD 9907-838​ power supply module is engineered to deliver exceptional reliability, clean power, and robust protection, forming the stable foundation required for critical engine and turbine control systems.
High Reliability and Industrial Robustness: Designed for 24/7 operation in harsh industrial and oil & gas environments, the 9907-838​ utilizes high-quality components and conservative design margins. It is built to withstand temperature variations, vibration, and electrical noise commonly found near large engines and generators. This rugged construction ensures long-term, maintenance-free operation, which is paramount for applications where unscheduled downtime can lead to significant operational and financial losses.
Comprehensive Protection and Noise Immunity: The module incorporates multiple layers of protection to ensure system safety and integrity. Features like over-voltage, over-current, and short-circuit protection actively safeguard the downstream sensitive control cards from damage due to input transients or load faults. Furthermore, the use of transformer isolation and advanced filtering techniques in the 9907-838​ provides excellent noise immunity, preventing electrical disturbances on the input side or between different output rails from corrupting the delicate analog and digital signals within the control system. This results in more stable and accurate control performance.
Seamless System Integration and Diagnostics: As a genuine Woodward component, the 9907-838​ is designed for plug-and-play compatibility within designated Woodward control system racks or enclosures. It fits mechanically and electrically without modification. Many versions also provide status indicators (LEDs) for power good, fault conditions, or load status, offering immediate visual diagnostics. This ease of integration and built-in health monitoring simplifies system assembly, commissioning, and troubleshooting, reducing overall project time and lifecycle costs.

Application Fields

The WOODWARD 9907-838​ power supply module is an essential component in control systems across industries where reliable prime mover control is critical.
In Oil & Gas Production, it powers the electronic governing and protection systems for natural gas compressor engines and generator sets used on offshore platforms and pipeline stations. The clean and reliable power from the 9907-838​ is vital for ensuring precise speed control and safe operation in these remote and critical applications. In Power Generation, particularly for distributed generation and standby power, it is used within control panels for diesel and gas-fired generator sets, providing stable power for the governor, synchronizer, and protection modules.
Furthermore, in the Marine​ industry, it supplies power to the control systems of ship propulsion engines and auxiliary generator sets. In Industrial Manufacturing, it is found in control systems for large diesel or gas engines driving pumps, compressors, and mechanical drives. Essentially, the WOODWARD 9907-838​ is deployed in any application utilizing a Woodward NetCon or similar control system for reciprocating engines or turbines, wherever a dedicated, high-integrity power source is required to ensure the control system’s continuous and fault-free operation.

Related Products

  • NetCon Controller Modules (e.g., 9907-xxx series): The control logic cards (CPU, I/O) that are powered by the 9907-838​ power supply.
  • Woodward Control Enclosures / Racks: The proprietary chassis or rack systems designed to house the power supply, controller, and I/O modules.
  • 9907-837 / 9907-839: Likely other power supply modules in the same family with different input voltage ranges or output power ratings.
  • I/O Expansion Modules: Various analog and digital input/output cards that receive their operating power from the 9907-838.
  • Woodward ToolKit Software: The configuration and diagnostic software for the control system, which may also monitor power supply health status if supported.
  • Backplane / Motherboard: The interconnecting board within the control rack that distributes power from the 9907-838​ to all other modules.
  • Redundant Power Supply Kits: Systems that may use two 9907-838​ units in a redundant configuration for high-availability applications.

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