Product Description

Overview

The Bently Nevada 125840-01 is a high-voltage AC Power Input Module (PIM) engineered for integration with the 3500/15 Power Supply in the 3500 Series Machinery Protection System. Positioned at the rear of the rack, this module provides the primary interface for incoming AC mains power, delivering surge protection and filtering before power reaches the front-end power supply.

It is compatible with legacy high-voltage 3500/15 power supplies and supports redundant power configurations, ensuring uninterrupted operation for critical machinery monitoring systems.

Key Features

Voltage & Frequency Compatibility

• Supports AC input from 175 to 264 Vac RMS

• Peak voltage tolerance up to 373 Vac

• Operates across a wide frequency range of 47–63 Hz, accommodating global power standards

Protection & Safety

• Integrated overvoltage protection with a replaceable fuse (Bently Nevada Part Number 01720025)

• Resistant to undervoltage conditions, preventing module or power supply damage

• Serves as the primary defense layer against voltage surges entering the rack

Industrial Reliability

• Operating temperature: -30°C to +65°C (-22°F to +150°F)

• Storage temperature: -40°C to +85°C (-40°F to +185°F)

• Hot-swappable in redundant systems for minimal downtime

• High humidity tolerance: 95% non-condensing

Redundancy Support

• Each power supply in a dual configuration uses its own 125840-01 PIM

• Enables dual AC sources for critical rack redundancy

Technical Specifications

Applications

The 125840-01 is ideal for industrial monitoring environments where reliable power entry and protection are critical. It is commonly deployed in:

• Rotating machinery monitoring systems

• Redundant rack power configurations

• Harsh environmental conditions with high temperature or humidity

Frequently Asked Questions (FAQ)

Q: What is the function of the 125840-01 module?
A: It acts as the high-voltage AC input interface for the 3500/15 power supply, providing surge protection and filtering for incoming mains power.

Q: Can this module be used with newer universal AC power supplies?
A: No. The 125840-01 is compatible only with legacy high-voltage 3500/15 power supply modules.

Q: Is hot-swapping possible?
A: Yes, in a dual redundant power setup, the module can be serviced without shutting down the system, provided the secondary supply remains active.

Q: What happens if the input voltage exceeds safe limits?
A: The module’s fuse will open to protect downstream electronics. Undervoltage conditions do not cause damage.