Bently Nevada 3500/15-01-01-00 125840-02 AC Power Module

Power System Overview

The Bently Nevada 3500/15-01-01-00 125840-02 functions as a low voltage AC power input module for the 3500 series monitoring systems. This module converts incoming AC power into regulated DC for all rack components. It ensures clean and stable power for vibration monitoring applications. Machinery protection systems depend on this module for uninterrupted operation.

Technical Specifications

The 3500/15-01-01-00 125840-02 measures 241.3 mm in height and 50.8 mm in width. Its full-height form factor fits the 3500 rack system. The module weighs approximately 1.1 kilograms. It accepts 90 VAC to 132 VAC at 47 Hz to 63 Hz.

Parameter	Specification
Model / Part No.	3500/15-01-01-00 / 125840-02
Product Type	Low Voltage AC Power Input Module
Dimensions	241.3 mm x 50.8 mm x 150 mm (depth)
Weight	~1.1 kg
Input Voltage	90 VAC to 132 VAC
Input Frequency	47 Hz to 63 Hz
Input Current	2.5 A (max)
Output Power	250 W (total)
Output Voltages	+5V DC, +15V DC, -24V DC
Connector Type	1 x 3-pin AC input header
On-board Components	1 x transformer, 1 x rectifier, 3 x regulators
Energy Storage	3300 μF bulk capacitor
Protection	Overvoltage, overcurrent, short-circuit
LED Indicators	1 x Power OK (green), 1 x Fault (red)
Operating Temp.	-30°C to +65°C

Power Conversion Architecture

This module uses a linear power supply design for low electrical noise. A step-down transformer isolates the input from the output circuits. A full-wave rectifier converts the AC input to raw DC. Three linear regulators produce the required output voltages. The 3500/15-01-01-00 125840-02 delivers +5V, +15V, and -24V rails to the backplane. A 3300 μF capacitor provides substantial energy storage. This capacitance sustains operation through brief AC interruptions.

Protection and Monitoring Features

The Bently Nevada incorporates comprehensive protective circuits. Overvoltage protection prevents damage to downstream modules. Overcurrent limiting safeguards the power supply from load faults. Short-circuit protection disables the outputs during wiring errors. A green Power OK LED confirms all outputs are within tolerance. A red Fault LED illuminates when any protection circuit activates. The module automatically resets after fault clearance.

Installation and System Integration

Installing the requires the first slot in the 3500 rack. The module connects directly to the backplane via its edge connector. You must wire the AC mains to the 3-pin input header. The module operates across a wide -30°C to +65°C temperature range. This broad range suits harsh industrial and outdoor installations. Proper grounding minimizes electrical noise in the monitoring system.

Reliability and Service Considerations

The Bently Nevada 3500/15-01-01-00 125840-02 provides reliable power for critical machine protection. The linear design generates minimal electromagnetic interference. This low-noise output ensures accurate vibration measurements. Regular inspection includes checking LED status and input fuse integrity. Module replacement requires only a few minutes of system downtime.