Woodward 5501‑381 TMR Power Supply Module

The Woodward 5501‑381 is a plug‑in triple‑modular‑redundant (TMR) AC power supply module for Woodward MicroNet TMR turbine governor control systems. It converts 220 VAC input into regulated internal rack power, delivering stable power for CPU, I/O and communication boards inside the control chassis. Designed for safety‑critical power generation facilities, it provides fault‑monitoring capability to enhance availability for gas‑steam turbine and generator governing control.

This power supply card installs within MicroNet TMR power chassis, equipped with multi‑color front‑panel LED indicators for input fault, power fault, over‑temperature and normal operation status. It supports maximum input power of 1250 VA and maintains short hold‑up time for transient power disturbance tolerance. Original production has been discontinued. It is widely supplied as aftermarket spare parts for power‑plant turbine control cabinet maintenance and legacy TMR system retrofit projects.

Main Specifications

1. Brand:Woodward; Model:5501‑381; Type:MicroNet TMR AC Power Supply Module
2. Compatible Platform:Woodward MicroNet TMR triple‑modular‑redundant turbine governor chassis
3. Input Rating:220 VAC, 47‑63 Hz, maximum input power 1250 VA
4. Status Indicator:Four front‑panel LEDs for input fault, power fault, over‑temperature and OK status feedback
5. Installation:Plug‑in card format for dedicated MicroNet TMR power supply chassis slot
6. Diagnostic Feature:On‑board self‑diagnosis for over‑temperature, over‑load and input power abnormality detection
7. Supply Status:Original production discontinued, available as tested surplus or refurbished spare parts

Core Functions

1. Convert 220 VAC mains input into well‑regulated internal power rails for all functional modules inside MicroNet TMR control rack.
2. Continuously monitor input voltage, internal output status and board operating temperature, trigger fault indication upon abnormal operating conditions.
3. Provide hardware fault signals to the main TMR controller, allowing host system to record power‑related alarm events for plant maintenance logging.
4. Work within TMR redundant power architecture to reduce single‑point‑of‑failure risk for safety‑critical turbine governing control equipment.
5. Front‑panel LED lights enable on‑site technicians to quickly identify power‑related faults without relying on host software diagnostics.
6. Serve as key power conversion hardware for Woodward MicroNet TMR turbine control systems deployed in power‑generation plants.

Application Scenarios

1. Gas‑turbine and steam‑turbine generating units adopting Woodward MicroNet TMR fault‑tolerant governor control architecture.
2. Spare power‑supply module replacement and routine maintenance of existing MicroNet TMR turbine control cabinets.
3. Technical renovation and power‑supply reliability upgrade of legacy safety‑critical turbine automation control systems.
4. On‑site troubleshooting and replacement of faulty power modules on continuously running power‑generation turbine units.
5. Spare‑parts stocking for system integrators and power‑plant maintenance contractors supporting Woodward MicroNet TMR hardware platforms.
6. Global aftermarket spare supply for technical teams maintaining obsolete Woodward MicroNet‑TMR series turbine control hardware.

FAQ

1. Q:Can Woodward 5501‑381 work as standalone power unit?
   A:It must be inserted into dedicated MicroNet TMR power chassis, cannot operate as an independent external power supply.
2. Q:What symptoms appear upon module failure?
   A:Loss of rack internal power, power‑fault alarm, over‑temperature warning and partial or complete system module outage may occur.

3. Q:How to perform status diagnosis?
   A:Read front‑panel LED status locally, or read detailed fault logs via Woodward official configuration software connected to host TMR controller.