Description

Product Overview

The Woodward 9907-164 is a Power Supply Module designed specifically for Woodward’s ProTech or EasyGen series of turbine/engine control and generator protection systems. This module is a critical subsystem component responsible for converting the raw incoming AC or DC power (typically from the plant supply or a battery bank) into the clean, stable, and isolated DC voltage rails required by the sensitive electronic control cards within the chassis. Its primary function is to provide reliable, conditioned power to the processor, I/O modules, and communication cards, ensuring the entire control system operates without interruption or corruption due to power anomalies. Built with industrial-grade components and often featuring redundancy or supervisory capabilities, the 9907-164 is engineered for continuous operation, protecting the control system from voltage spikes, sags, and noise that are common in power generation and industrial environments. Its reliable operation is fundamental to the overall availability and safety of the equipment it controls.

Technical Specifications

Parameter Name	Parameter Value
Manufacturer Part Number	9907-164
Manufacturer	Woodward
Associated System	ProTech Turbine Safety System, EasyGen Generator Controls, or related Woodward control platforms.
Module Type	Power Supply Unit (PSU)
Input Voltage	Wide-range AC or DC input. Common specifications: • AC: 85-264 VAC, 47-63 Hz • DC: 20-60 VDC or 90-300 VDC (specific to model variant)
Output Voltages	Multiple isolated DC outputs, e.g.: • +5 VDC (for logic circuits) • ±12 VDC or ±15 VDC (for analog circuits) • +24 VDC (for digital I/O and relays)
Output Current/Power	Rated for sufficient total power (e.g., 50W, 100W) to supply all modules in the chassis.
Efficiency	High efficiency (>80%) to minimize heat generation.
Protection Features	<ul><li>Overvoltage Protection (OVP)</li><li>Overcurrent Protection (OCP)</li><li>Short-Circuit Protection</li><li>Thermal Shutdown</li></ul>
Isolation	Reinforced isolation between input and output, and between outputs, for safety and noise immunity.
Status Indication	LEDs for AC/DC Power OK, Output OK, and Fault.
Form Factor	Printed Circuit Board (PCB) or enclosed module designed for mounting within a Woodward control chassis.
Mounting	Typically plugs into a backplane or mounts on DIN rail/plate inside the control cabinet.
Operating Temperature	Industrial range, e.g., -20°C to +70°C.
Certifications	UL, cUL, CE, ATEX (for hazardous area versions) depending on model.

Main Features and Advantages

High Reliability and Robust Design for Critical Systems: The 9907-164 is built to the stringent requirements of control systems that cannot afford unexpected downtime. It uses high-quality capacitors, transformers, and semiconductors rated for long life at elevated temperatures. Its robust design ensures stable operation despite fluctuations in the raw input power, which is common in plant environments, thereby safeguarding the entire control system from power-related faults.

9907-164

Comprehensive Protection and Diagnostics: The module incorporates multiple layers of protection. Overvoltage and overcurrent protection prevent damage to the power supply itself and the connected control cards in the event of a fault. Status LEDs provide immediate, local indication of health (Input OK, Output OK, Fault), enabling quick visual troubleshooting. This diagnostic capability is crucial for minimizing system recovery time.

Designed for Seamless System Integration: This is not a generic power supply; it is engineered to fit mechanically and electrically into a Woodward control chassis. Its output voltages and current capacities are matched to the requirements of the other system modules (CPU, I/O, comms). This plug-and-play compatibility simplifies system design, reduces integration risks, and ensures reliable performance as a complete system backed by Woodward’s technical support.

Application Areas

This power supply module is a core component within Woodward control system enclosures for:

Gas & Steam Turbine Protection (ProTech): Providing clean power to the triple modular redundant (TMR) or fault-tolerant safety controllers and their I/O.
Generator Set Control (EasyGen): Powering the governor control, synchronizer, and protection modules in genset control panels.
Engine Governing Systems: In control panels for industrial and marine engines.
Compressor Control & Anti-Surge Systems.

Installation and Maintenance

Installation Preparation:

Input Power Verification: Before connection, verify that the incoming AC or DC voltage matches the 9907-164‘s input rating exactly. Applying incorrect voltage will destroy the module.
Mounting: Secure the module in its designated location within the control chassis, ensuring good airflow for cooling.
Wiring: Connect the input power wires to the correct terminals, observing polarity for DC inputs. Ensure connections are tight. Connect the output to the system backplane or distribution board.
Safety: Always follow lockout/tagout (LOTO) procedures when working inside control cabinets.

Maintenance Advice:

Visual and Operational Check: Regularly inspect the module for signs of overheating (discoloration), bulging capacitors, or burn marks. Verify that the Power OK and Output OK LEDs are illuminated during normal operation.
Output Voltage Verification: During scheduled outages, use a digital multimeter to measure the output voltages (+5V, ±12/15V, +24V) at test points or at the backplane. Ensure they are within specification (typically ±5%).
Preventive Replacement: Electrolytic capacitors have a finite lifespan, especially in hot environments. Proactive replacement of the power supply module after 7-10 years of service, or as part of a major system overhaul, is a recommended best practice to prevent unpredictable failures.
Fuse Check: If the module has an external input fuse, check its rating and condition during inspections.
Spare Parts: For critical control systems, keeping a verified spare 9907-164 power supply module on-site is essential for minimizing downtime in the event of a failure.