Bently Nevada 176449-02 3500/25 Keyphasor External Termination I/O Module

Product Description

Overview

The Bently Nevada 176449-02 is a half-height External Termination (ET) I/O module designed for the 3500/25 Enhanced Keyphasor Monitor. Unlike internal termination versions, this module is intended for use with a dedicated external termination block and shielded cabling, which centralizes field wiring for cleaner rack layouts and easier maintenance in large-scale industrial facilities.

This module converts pulses from proximity probes, magnetic pickups, or optical sensors into precise signals for the 3500/25 monitor to calculate speed and phase, ensuring accurate machinery diagnostics.

Key Features

External Connectivity

• Requires connection through a high-density external termination block and ET cable

• Reduces wiring clutter behind the 3500 rack while maintaining signal integrity

• Ensures low-latency transmission of once-per-turn pulses with ±1° phase accuracy

Versatile Transducer Support

• Compatible with Proximitor sensors for non-contact phase monitoring

• Supports magnetic pickups for passive high-speed sensing

• Handles two independent Keyphasor channels, which can be configured for different transducer types

Performance and Reliability

• Processes signals from 1 RPM up to 1,200,000 CPM (20 kHz)

• Includes precision signal conditioning to handle varying pulse shapes and amplitudes

• Operates in industrial temperature ranges from -30°C to +65°C

• High-density connector design protects against wiring errors and mechanical vibration

Technical Specifications

Applications

Ideal for high-reliability machinery monitoring in power plants, oil and gas facilities, and heavy industrial installations. The 176449-02 ensures accurate phase and speed measurements while enabling centralized field wiring management for complex monitoring systems.

FAQ

Q: How does this module differ from the 176449-04?
A: The 176449-02 uses an external termination block and requires ET cables, while the 176449-04 features screw terminals for direct wiring and provides electrical isolation between field and rack.

Q: Can it handle multiple sensor types simultaneously?
A: Yes, each of the two Keyphasor channels can be configured independently to accept different transducer types.

Q: Is this suitable for high-speed applications?
A: Yes, it can process signals from 1 RPM up to 1,200,000 CPM, depending on the pulse rate of the connected sensors.

Comparison to Similar Modules

• 176449-04 (Internal Termination): Screw-terminal connections, ideal for single-rack installations with isolation needs.

• 176449-02 (External Termination): Uses external blocks for cleaner cable management in large-scale plants.

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