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Woodward 5453-277 – MicroNet TMR Power Supply Chassis
Product Overview
The Woodward 5453-277 is a MicroNet TMR power supply chassis designed for Woodward MicroNet Triple Modular Redundant control systems. Woodward’s official documentation identifies it specifically as a “MicroNet TMR Power Supply Chassis” and lists it among the SIL-approved MicroNet TMR hardware. The chassis provides the mechanical and electrical infrastructure for redundant power-supply modules and connects to the main MicroNet TMR chassis through dedicated interconnect cables. This arrangement supports high-availability turbine-control architectures where a single power-supply fault should not interrupt controller operation. The chassis is not itself the individual power-supply module; compatible MicroNet TMR power supplies, such as the 5501-370, 5501-380, and 5501-381, are installed as part of the overall power architecture.
Technical Specifications — 5453-277
| Parameter | Value |
|---|---|
| Product Model | 5453-277 |
| Manufacturer | Woodward |
| Product Type | MicroNet TMR Power Supply Chassis |
| System | MicroNet TMR |
| Architecture | Triple Modular Redundancy |
| Primary Function | Redundant power-supply chassis |
| Power Supply Modules | Compatible MicroNet TMR power-supply modules |
| Power Input | Determined by installed power-supply modules |
| Communication / Protocol | System-level MicroNet interconnection |
| Main Chassis Connection | 5416-977 ribbon cable and redundant 5417-293 power interconnect cable |
| Mounting | MicroNet control-system installation |
| Dimensions (HxWxD) | Verify applicable Woodward mechanical drawing |
| Weight | Verify actual assembly and packaging |
| Cooling | Redundant fan arrangement |
| Safety Application | Listed by Woodward among SIL-reviewed MicroNet TMR hardware |
Woodward’s catalog specifies the 5453-277 as the MicroNet TMR power-supply chassis and notes its connection to the main chassis using the 5416-977 ribbon cable and redundant 5417-293 power interconnect cable.
Woodward 5453-277
Key Features and Benefits — 5453-277
- Dedicated power-supply chassis for MicroNet TMR architectures.
- Supports redundant power distribution for high-availability control systems.
- Redundant fan arrangement provides additional cooling resilience.
- Designed for integration with the MicroNet TMR main chassis.
- Supports applications where power-supply redundancy is important to turbine-control availability.
- Listed in Woodward’s SIL-reviewed MicroNet hardware documentation.
The distinction between the chassis and the power-supply module is important when preparing spare inventory. Personally, I would verify the complete chassis assembly, installed power modules, fans, and interconnect cables before treating a replacement as ready for service.
Related Models
5453-279 — MicroNet TMR main chassis designed to accommodate the control-system modules.
5501-370 — MicroNet TMR power supply with 24 VDC input.
5501-380 — MicroNet TMR power supply for 120 VAC/VDC input applications.
5501-381 — MicroNet TMR power supply for 220 VAC input applications.
Installation and Maintenance — 5453-277
Before replacement, isolate the MicroNet control-system power sources and follow Woodward’s applicable turbine-control maintenance procedure. Record the installed power-supply modules, cable connections, fan arrangement, and chassis position before removal.
Inspect the redundant fans, power connectors, interconnect cables, and chassis mounting hardware for contamination, loose connections, or thermal damage. Verify that the installed power modules match the plant’s input-voltage architecture. Personally, I would test the redundant power paths independently before returning a TMR system to normal operation.
Product Warranty — 5453-277
Warranty coverage depends on supplier, condition, testing status, and purchase agreement. For used or refurbished units, functional inspection should include chassis connections, fan operation, mechanical condition, and compatibility with the installed MicroNet TMR power modules. The Woodward 5453-277 should be matched to the complete MicroNet TMR power architecture before commissioning.
