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Phone: +86 16626708626Description
Key Technical Specifications
- Product Type: Simplex Power Supply Board for the MicroNet Digital Control platform
- System Type: Simplex (single, non-redundant supply — not the TMR power supply variant)
- Output Voltage: 24 VDC
- Maximum Output Current: 29.5 A
- Maximum Power Rating: 531 W
- Input Voltage Range: Reported between 18 and 36 VDC across sources (one lists 20–32 VDC) — confirm the exact input window against your incoming supply before installing
- Fuse/Circuit Breaker Rating: 50 A, time-delay type
- Required Wire Size: 8 AWG / 10 mm²
- Holdup Time: 5 ms at 24 VDC
- Fault Monitoring: Continuous self-check for input faults, overtemperature, and power supply faults, with automatic trip on detection
- Status LEDs: OK, Power Supply Fault, Input Fault, Overtemperature
- Weight: 1.75 lbs
- Applicable Manual: 26166V1
Product Introduction
The Woodward 5501-465 is a Simplex Power Supply Board built for the MicroNet Digital Control platform, converting an 18–36 VDC input into regulated 24 VDC output at up to 29.5 A for a single-chassis control rack. Four front-panel LEDs — OK, Power Supply Fault, Input Fault, and Overtemperature — give a tech an immediate read on the board’s health without pulling a meter.
This is the Simplex variant, not the TMR redundant supply — it’s built for control systems running a single power path rather than a triple-redundant configuration. Woodward has discontinued the part, and with the fault-monitoring built in, a bad board tends to announce itself clearly through the LEDs rather than leaving you guessing.
5501-465
5501-465
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Input Fault LED lit | Incoming supply outside the rated voltage window, or wiring fault at the input terminals | ✅ High | Measure incoming DC voltage at the board’s input terminals | Correct the upstream supply voltage before assuming board failure |
| Overtemperature LED lit | Blocked chassis ventilation or ambient temperature exceeding the board’s rating | ⚠️ Medium | Check chassis airflow and ambient temperature around the power supply | Fix cooling before replacing the board — the protection circuit is functioning as designed |
| Power Supply Fault LED lit, OK LED off | Internal regulation fault on the board itself | ✅ High | Confirm input voltage and wiring are correct, then check output voltage at the 24 VDC rail | If input is confirmed good and output is absent or out of spec, the board itself has failed |
| Chassis loses power intermittently under load | 50 A fuse/breaker marginally sized for a growing load, or a downstream short pulling excess current | ✅ High | Check breaker trip history and measure actual DC load current under normal operation | Verify downstream load hasn’t grown beyond the board’s rated capacity before condemning it |
| No LEDs lit at all, board appears dead | No input power reaching the board, or wire size undersized for the 29.5 A rating causing excessive voltage drop | ⚠️ Medium | Measure voltage directly at the input terminals; confirm wire gauge matches the 8 AWG / 10 mm² spec | Correct wiring/wire size before replacing the board |
If these checks don’t resolve it, contact technical support with the specific LED pattern observed and your measured input voltage before ordering a replacement.
Frequently Asked Questions (FAQ)
Is this the same as the TMR power supply board I’ve seen for MicroNet systems?
No. This is the Simplex variant, built for single-chassis MicroNet systems without redundant power paths. Don’t substitute it into a TMR rack expecting a compatible redundant configuration — check your system documentation for the correct part if you’re running TMR.
Is the 5501-465 still available new from Woodward?
No — it’s discontinued by the manufacturer. Current stock comes from new surplus, remanufactured exchange units, or used-and-tested cores rather than a factory production run.
Will a replacement board need any configuration after installation?
No. This is a power supply board with no software configuration — once wired in per spec (correct input voltage, correct wire gauge) and the fuse/breaker sized correctly, it should power up and report status through its LEDs.
Can I hot-swap this while the control system is running?
Don’t, unless your system documentation explicitly confirms it for a Simplex configuration. Since there’s no redundant power path in a Simplex setup, pulling this board live means losing chassis power entirely.
Why do the input voltage range figures I’ve seen vary slightly (18–32 vs 20–32 vs 18–36 VDC)?
Distributor listings for this part aren’t fully consistent on the exact input window. Confirm the precise rated range against Woodward manual 26166V1 before you commission a supply voltage outside what a couple of these listings suggest.
What’s the difference between “new surplus” and “used, clean and tested”?
New surplus generally means unused stock pulled from decommissioned equipment with no guarantee it was bench-tested. “Used, clean and tested” means someone actually verified functionality before listing it. Ask which applies, and what the test actually covered, before you put it into service.
What warranty should I expect?
It varies — some sellers offer a standard one-year warranty, others extend to two years on rebuilt or remanufactured units. Get the specific terms in writing, especially given that lead time on sourcing a second replacement for a discontinued part can run longer than expected.
