Industrial-Grade MicroNet Simplex Power Supply (Model 5501-466)

The Woodward 5501-466 represents a mission-critical power distribution solution engineered specifically for MicroNet Digital Control Systems deployed in gas turbine management, power generation facilities, and upstream oil & gas operations. This simplex-architecture module converts 120VAC or VDC input into regulated multi-voltage DC outputs, ensuring uninterrupted operation of control logic, I/O modules, and communication interfaces in single-channel configurations.

Designed for process engineers and automation integrators managing legacy MicroNet installations, the 5501-466 addresses voltage fluctuation challenges in remote sites while maintaining compatibility with existing chassis infrastructure. Its wide input tolerance (88-150VAC/VDC) and thermal resilience (-40°C to +70°C) make it ideal for harsh industrial environments where power quality directly impacts safety-critical control loops.

With built-in fault diagnostics via LED indicators and 5ms holdup time during transient events, this module minimizes unplanned downtime while simplifying troubleshooting. Whether you're maintaining existing MicroNet systems or sourcing replacement components for aging installations, the 5501-466 delivers proven reliability backed by CE and UL certifications.

Core Capabilities & Business Value

→ Dual Input Flexibility
Accepts both 88-132VAC and 100-150VDC sources without reconfiguration, reducing spare parts inventory and enabling rapid field deployment across sites with varying power infrastructure.

✓ Regulated Multi-Rail Output
Provides stable 24VDC, 5VDC, and auxiliary voltages up to 600W total capacity, supporting full MicroNet chassis population including CPU, I/O cards, and communication modules in simplex mode.

→ Real-Time Fault Visibility
Four dedicated LED indicators (OK, Input Fault, Overtemperature, PSU Fault) enable instant status assessment during commissioning and troubleshooting, cutting diagnostic time by 60% versus non-visual alternatives.

✓ Extended Environmental Range
Operates reliably from -40°C to +70°C with 5-95% non-condensing humidity tolerance, eliminating the need for climate-controlled enclosures in outdoor or offshore installations.

→ Plug-and-Play Integration
Direct chassis mounting via proprietary connector ensures mechanical stability and eliminates field wiring errors, reducing installation time to under 10 minutes per module.

✓ Transient Ride-Through
5ms holdup time maintains output voltage during brief power interruptions, preventing nuisance trips in applications with unstable grid connections or motor-driven generators.

Application Scenarios

Gas Turbine Control Retrofits
When upgrading 1990s-era MicroNet systems in combined-cycle plants, the 5501-466 serves as a drop-in replacement for obsolete power modules, restoring system availability without requiring full control system migration. Solves the challenge of maintaining 25+ year-old installations where OEM support has transitioned to legacy status.

Offshore Platform Automation
In North Sea or Gulf of Mexico production platforms, this module powers MicroNet controllers managing wellhead chokes and separator logic despite salt-laden atmospheres and temperature swings. Addresses the pain point of frequent power supply failures in marine environments by offering IP20-rated construction with conformal coating options.

Pipeline Compressor Stations
Remote natural gas compression facilities rely on the 5501-466 to maintain control system uptime during grid voltage sags caused by motor starting transients. Delivers value by reducing emergency callouts through its wide input tolerance and fault annunciation capabilities.

Refinery Process Units
Catalytic cracker and hydroprocessing units use this power supply in MicroNet-based burner management systems where safety integrity depends on continuous controller operation. Solves compliance requirements by maintaining UL certification for hazardous location installations.

Cogeneration Facilities
Industrial steam-and-power plants integrate the 5501-466 into MicroNet governor controls for reciprocating engines and small turbines, where dual-fuel operation demands reliable control power regardless of utility source quality.

Technical Parameters & Selection Guide

Selection Criteria: Choose the 5501-466 when your application requires simplex (non-redundant) power architecture with 120VAC/VDC input availability. For redundant configurations, consider dual-module installations with external load-sharing diodes. Confirm chassis backplane compatibility before ordering—this module is NOT interchangeable with 5501-467 (TMR variant) or earlier 5501-4xx revisions.

Extended Integration Capabilities

SCADA Connectivity: While the power supply itself lacks communication ports, it integrates seamlessly with MicroNet CPU modules that support Modbus RTU, Ethernet/IP, and proprietary Woodward protocols for remote monitoring of control system health.

Predictive Maintenance: Overtemperature LED provides early warning of cooling system degradation or excessive ambient conditions, enabling condition-based replacement before catastrophic failure.

Spare Parts Strategy: Modular design allows stocking a single 5501-466 unit to support multiple MicroNet installations across a facility, reducing capital tied up in redundant inventory compared to integrated power/controller designs.

Obsolescence Management: As Woodward transitions focus to newer NetCon and MicroNet Plus platforms, the 5501-466 remains available through authorized distributors and remanufacturers, extending lifecycle support for legacy assets.

Delivery & Service Assurance

Lead Time: Standard delivery within 3-5 business days for in-stock units; remanufactured or tested-surplus options available with 10-15 day lead time for budget-conscious projects.

Warranty Coverage: 12-month warranty against manufacturing defects, covering materials and workmanship. Extended 24-month coverage available for new OEM-sealed units.

Technical Support: Access to application engineers with MicroNet system expertise for integration guidance, troubleshooting assistance, and compatibility verification. Phone and email support included with purchase.

Documentation Package: Each unit ships with installation quick-start guide, wiring diagrams, and LED diagnostic reference card. Full technical manual (Woodward publication 82510) available for download upon request.

Testing & Certification: All units undergo power-on testing and output voltage verification prior to shipment. Certificates of conformity provided for CE/UL compliance documentation.

Frequently Asked Questions

Can the 5501-466 power supply module interface with modern DCS systems for remote diagnostics?
The module itself does not have built-in communication capabilities, but it works within MicroNet systems that support Modbus and Ethernet protocols through the CPU module, enabling integration with contemporary SCADA and DCS platforms for system-level monitoring.

What is the maximum chassis configuration this simplex power module can support?
With 600W total output capacity, the 5501-466 typically supports a fully populated 8-slot MicroNet simplex chassis including CPU, analog/digital I/O modules, and communication cards. Exact capacity depends on specific module types—consult load budget worksheet in manual 82510.

How does this module improve energy efficiency compared to older linear power supplies?
The 5501-466 employs switch-mode topology achieving approximately 85% efficiency, reducing heat generation by 40-50% versus legacy linear designs. This translates to lower cooling requirements and reduced operating costs in thermally-constrained enclosures.

What installation requirements must be met for UL compliance in hazardous areas?
The module itself carries UL general-purpose listing; for Class I Division 2 installations, it must be mounted in a purged/pressurized enclosure or NEMA 4X cabinet meeting NEC Article 500 requirements. Consult local AHJ for specific installation codes.

Is remote monitoring of power supply health possible without upgrading the entire control system?
Yes—the four LED indicators can be monitored via optional external relay modules that convert visual status to discrete signals, which then feed into existing PLC or DCS alarm systems without modifying the MicroNet configuration.

What are the recommended spare parts for a facility operating six MicroNet simplex systems?
Industry best practice suggests maintaining one spare 5501-466 module per 4-6 installed units, plus documentation of input fuse specifications (15A time-delay for VAC, 10A for VDC) and recommended wire gauge (14 AWG/2.5mm²) for emergency repairs.

Get Your Quote Today

Ensure uninterrupted operation of your MicroNet control systems with genuine Woodward 5501-466 power modules. Our team provides same-day quotations, technical compatibility verification, and expedited shipping for urgent replacements. Contact us now to discuss your specific application requirements or request a detailed load calculation worksheet.

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