Bently Nevada 129478-01 3500/15 Power Module

This power input module supplies regulated DC power to the Bently Nevada 3500 monitoring system. It converts AC or DC input into stable outputs for all rack-mounted modules. The 129478-01 3500/15 provides dual redundant power inputs for maximum system availability.

Core Electrical Specifications

The module accepts a wide input range of 85–264 V AC or 88–140 V DC. It delivers a single regulated output of 24 V DC at 4.5 A continuously. Furthermore, the unit achieves 85% typical efficiency across its entire load range. The module includes built-in reverse polarity protection on all input terminals. It also features overcurrent and overvoltage protection for safe operation.

Connectivity and Diagnostic Features

The front panel houses two separate input connectors for redundant power feeds. Each connector uses a 3-pin terminal block with locking screws for secure wiring. Additionally, the 129478-01 3500/15 includes a green LED for power-good indication per input. A red LED signals any internal fault or output failure condition immediately. Two relay contacts provide remote alarm annunciation to external systems.

Energy Storage and Ride-Through Capability

An internal capacitor bank stores 50 joules of energy for hold-up requirements. This storage maintains full output regulation for 50 milliseconds following an input dropout. Consequently, the module prevents monitoring system resets during momentary power disturbances. The unit also employs active inrush current limiting to prevent supply damage.

Mechanical Specifications and Environmental Compliance

The module measures 24.1 x 10.5 x 4.5 centimeters and weighs approximately 1.2 kilograms. Its rugged chassis meets Bently Nevada’s stringent mechanical shock and vibration standards. The operating temperature range spans -20°C to +65°C for versatile deployment. Moreover, the 129478-01 3500/15 conforms to CE and UL safety requirements.

Technical Parameters Summary

Parameter	Specification
Model	Bently Nevada 129478-01 3500/15
AC Input Range	85–264 V AC, 47–63 Hz
DC Input Range	88–140 V DC
Output Voltage	24 V DC ±5%
Output Current	4.5 A (continuous)
Output Power	108 W
Efficiency	85% (typical)
Hold-up Time	50 ms at full load
Storage Energy	50 Joules (capacitor bank)
Inrush Current Limiting	Active soft-start circuit
Input Protection	Reverse polarity, overcurrent, overvoltage
Input Connectors	2 x 3-pin terminal block, redundant
Status Indicators	1 x green LED per input, 1 x red LED (fault)
Alarm Relays	2 x Form C contacts
Dimensions (W x H x D)	24.1 x 10.5 x 4.5 cm
Weight	1.2 kg
Operating Temperature	-20°C to +65°C
Certifications	CE, UL

System Integration and Application Areas

This power module integrates directly into Bently Nevada 3500 rack systems. It supplies clean power to monitoring cards for vibration, position, and temperature measurements. The unit’s redundant inputs allow connection to two separate power sources for fault tolerance. Power generation, petrochemical, and paper mills rely on its dependable operation.

Summary

The 129478-01 3500/15 delivers robust and redundant power for critical machinery monitoring applications. Its wide input range, extensive protection, and hold-up capability ensure uninterrupted operation. This module provides the reliable power backbone that 3500 monitoring systems demand.