Product Introduction
The Bently Nevada 3500/15 series comprises power supply modules for the 3500 Series machinery protection system. The combination 129486-01 + 129478-01 represents two independent power supply modules designed for redundant or diverse voltage input configurations. Both modules are full‑height units that occupy the dedicated power supply slots (the leftmost two slots) in a 3500 rack. They convert incoming AC or DC line power into regulated +24 VDC for the rack backplane and all installed monitor modules.
129486-01 – High‑voltage AC power supply (nominal 110–220 VAC, wide range 85–264 VAC)
129478-01 – Low‑voltage DC power supply (nominal 24 VDC, range 18–36 VDC)
When installed together, the two modules provide input voltage diversity (AC + DC) and redundancy (if both receive suitable power). If one supply fails or its input source is lost, the other continues to power the rack without interruption. Each module has independent overvoltage, overcurrent, and short‑circuit protection.
Parameters
| Parameter | 129486-01 (AC Power Supply) | 129478-01 (DC Power Supply) |
|---|---|---|
| Model / Part Number | 129486-01 | 129478-01 |
| Product Type | 3500/15 High‑Voltage AC Power Supply | 3500/15 Low‑Voltage DC Power Supply |
| Input Voltage Range | 85 to 264 VAC (nominal 110–220 VAC) | 18 to 36 VDC (nominal 24 VDC) |
| Input Frequency | 47 to 63 Hz | N/A |
| Output Voltage | +24 VDC (regulated) | +24 VDC (regulated) |
| Output Power | 350 W continuous | 350 W continuous |
| Efficiency | > 85% | > 85% |
| Redundancy | Hot‑swappable, parallel operation with other 3500/15 modules | Same |
| Protection | Overvoltage, overcurrent, short‑circuit, overtemperature | Same |
| Slot Width | 1 full‑height slot (each) | 1 full‑height slot (each) |
| Dimensions (each module) | 24.9 × 241.3 × 218.4 mm (0.98 × 9.50 × 8.60 in) | Same |
| Weight (each module) | 1.2 kg (2.65 lbs) | 1.2 kg (2.65 lbs) |
| Total Combined Weight | 2.4 kg (5.3 lbs) | |
| Operating Temperature | 0 to +65 °C (32 to +149 °F) | 0 to +65 °C (32 to +149 °F) |
| Storage Temperature | –40 to +85 °C (–40 to +185 °F) | –40 to +85 °C (–40 to +185 °F) |
| Humidity | 5% to 95% non‑condensing | 5% to 95% non‑condensing |
| Cooling | Convection (no internal fan) | Convection (no internal fan) |
| Certification | CSA, ATEX, IECEx (safe area) | CSA, ATEX, IECEx (safe area) |
Application Scenarios
Redundant Power with Diverse Input Sources – Installed in the same 3500 rack (slots 1 and 2) to provide 1+1 redundancy. The AC supply (129486-01) connects to plant utility power, while the DC supply (129478-01) connects to a backup battery bank or emergency DC bus. This ensures continuous 3500 rack operation even if one input source fails – critical for offshore platforms, remote pumping stations, and nuclear power plants.
High‑Availability Machinery Protection – Protects turbines, compressors, and generators in refineries and chemical plants where unplanned shutdowns carry severe financial or safety risks. Redundant power eliminates single point of failure.
Global Voltage Compatibility (AC Supply) – The 129486-01 automatically accepts any AC voltage from 85 to 264 VAC, making it suitable for worldwide installation without jumper changes.
DC‑Only Installations – When only 24 VDC battery power is available (e.g., on ships, substations, or certain industrial control panels), the 129478-01 provides a dedicated DC‑to‑DC conversion with high efficiency.
Retrofit and Replacement – Replaces older 3500/15 power supplies (e.g., 125840-01 or 125800-01) while maintaining the same footprint and connector compatibility, allowing seamless upgrades to redundant or mixed‑input configurations.
Global direct procurement guarantee
All products are purchased directly from overseas original manufacturers or authorized channels, 100% guaranteed genuine quality, sufficient spot inventory, and comprehensive model coverage
Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
Flexible procurement plan
- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
- Long-term cooperative customers can apply for priority supply
Full service support
7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
Why do so many customers choose us?
On the basis of the same quality, we provide:
- More competitive price system
- Faster logistics response
- More complete technical support (free product technical documentation)
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