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Phone: +86 16626708626Description
Key Technical Specifications
- Manufacturer: Bently Nevada
- Model: 126399-01G
- Part family: 3500/15
- Product type: AC Power Supply Module
- System compatibility: Bently Nevada 3500 machinery protection system
- Power input: AC supply variant
- Output to rack: Regulated internal power for 3500 modules
- Status indication: Supply OK LED
- Redundancy: Supports single or dual supply configurations
- Dimensions: 30.00 × 10.00 × 10.00 cm
- Weight: 2 kg
Product Introduction
The Bently Nevada 126399-01G is an AC power supply module for the 3500 machinery protection rack. It is the 3500/15 power supply variant that provides rack power for monitoring modules in rotating equipment protection systems.
Buyers specify this supply to keep an installed 3500 rack running with the correct input architecture. The key points are input type match, supply version, and whether the rack uses single or dual (redundant) supplies.
- 126399-01G
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No power in the rack | Failed power supply or missing AC input | ✅ High | Measure AC input at the supply terminals and verify the Supply OK LED | Check upstream power and fusing before replacing the module |
| Supply OK LED off | Internal fault or undervoltage | ✅ High | Confirm input voltage is within range and check the front-panel LED | Replace only after confirming proper input |
| Redundant supply not taking over | Wiring fault or failed backup unit | ✅ High | Pull one supply under approved procedure and monitor rack behavior | Verify redundancy wiring and backup output |
| Rack resets under load | Weak supply or overloaded rack | ✅ High | Measure output stability while modules are running | Confirm total rack load and supply rating |
| Fuse opens at power-up | Downstream short or wrong module installed | ✅ Medium | Isolate the load and inspect connected modules | Check the rack before installing a new supply |
| Excess heat | Poor ventilation or aging components | ✅ Medium | Inspect airflow and measure cabinet temperature | Improve cooling and bench-test if needed |
If you get stuck, contact technical support with photos of the nameplate, rack slot, wiring, and fault indicators.
Frequently Asked Questions (FAQ)
Q: Is 126399-01G the power supply or the PIM?
A: 126399-01G is the AC power supply module (3500/15 variant). The Power Input Module (PIM) is a separate part, such as 125840-01 for high-voltage AC.
Q: Can one 3500/15 power the full rack?
A: Yes, a single supply can power the rack, and dual supplies can be used for redundancy. Most plants keep a spare on the shelf.
Q: Is it hot-swappable?
A: In a redundant configuration, the rack can stay up while one supply is removed or inserted under the proper procedure. Confirm your rack setup first.
Q: Are all 3500/15 supplies interchangeable?
A: No. AC and DC versions are different, and there are different AC voltage options. Match the existing nameplate and revision before ordering.
Q: What should I check before replacement?
A: Confirm input voltage, rack slot position, module condition, and whether the rack uses single or dual supply. Also inspect terminals and backplane for heat damage or corrosion.
Q: Why does this listing show “Surplus Open Package”?
A: Because it is excess inventory from a project or service stock that was opened but not used. The price is lower, but condition and part number accuracy must be clear.
Q: What is the biggest mistake with this part?
A: Ordering the wrong input version. It looks right but fails at power-up or won’t match the site electrical design.
