129478-01 Legacy High Voltage DC Power Input Module

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	129478-01
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Quick Detail

Description

Bently Nevada 129478-01 is a Legacy High Voltage DC Power Input Module designed for 3500 Series machinery protection racks. The 129478-01 operates with a High Voltage DC Power Supply and supports an input voltage range of 88 to 140 Vdc. When paired with a 3500 half-height power supply module, 129478-01 enables full rack operation with a maximum current draw of 2.5 A under high voltage DC conditions.

The 129478-01 provides undervoltage tolerance without damage to the supply or module, while overvoltage conditions trigger a protective fuse inside the PIM. Installed in a dedicated half-height slot behind the associated power supply, 129478-01 supports redundant configurations where two power supplies occupy the left-side rack positions. The lower slot functions as primary and the upper slot as backup, allowing module insertion or removal without interrupting rack power when redundancy is active.

Designed for automation environments, 129478-01 operates from -30°C to +65°C and withstands storage temperatures from -40°C to +85°C with up to 95% non-condensing humidity. The Supply OK LED confirms proper operation, ensuring continuous DC power delivery to vibration and protection modules within the 3500 Series system.

Applications

Application Power 3500 Rack Using 88 to 140 Vdc Input

129478-01 is installed as a High Voltage DC Power Input Module behind the associated half-height power supply in the 3500 rack. The 129478-01 accepts 88 to 140 Vdc input and delivers power to a full rack with a maximum current draw of 2.5 A. By using 129478-01, operators can connect high voltage DC sources directly to machinery protection systems without external converters.

Application Configure Redundant DC Power for Continuous Operation

When two half-height power supplies are mounted on the left side of the rack, 129478-01 supports redundant configuration. The lower supply acts as primary and the upper as backup. With 129478-01, removing or inserting one supply does not interrupt rack operation if the second supply remains active, ensuring uninterrupted power delivery to monitoring modules.

Application Protect Rack from Voltage Abnormal Conditions

129478-01 includes undervoltage tolerance that prevents damage to the power input module and supply. During overvoltage events, the internal fuse inside 129478-01 opens to isolate the fault. This design protects 3500 monitoring modules powered through 129478-01 from excessive DC input above 140 Vdc.

Specifications

Competitive Advantage

Competitive Advantage Wide DC Input Range for Industrial Systems

129478-01 operates within an 88 to 140 Vdc range, allowing integration with common industrial DC bus systems. The 2.5 A maximum full rack current rating of 129478-01 ensures sufficient power capacity for multiple protection and monitoring modules installed in the rack.

Competitive Advantage No Minimum Rack Load Requirement

129478-01 does not require a minimum rack load, allowing partial rack configurations during staged installation. Engineers can energize the rack using 129478-01 even when only a few modules are installed, reducing commissioning time.

Competitive Advantage Operates in Harsh Temperature and Humidity Conditions

129478-01 supports operating temperatures from -30°C to +65°C and storage temperatures from -40°C to +85°C. The 129478-01 tolerates up to 95 percent non-condensing humidity, enabling installation in turbine halls, compressor stations, and heavy industrial automation environments without additional environmental control devices.