Product Description

Overview

The Bently Nevada 176449-04 is a half-height internal termination I/O module designed for use with the 3500/25 Enhanced Keyphasor Monitor. It provides a direct interface for field Keyphasor sensors, including magnetic pickups, optical pickups, and Proximitor devices. By connecting directly to the rear screw terminals of the 3500 rack, this module eliminates the need for external terminal strips, ensuring reliable wiring and reducing potential signal errors.

Key Features

Precision Speed and Phase Monitoring

• Supports two independent Keyphasor channels for multi-shaft monitoring or redundant sensing of a single shaft

• Accurate detection of once-per-turn pulses for precise phase and synchronous vibration calculations

• Capable of high-speed operation with input signals ranging from 1 RPM up to 1,200,000 RPM, depending on sensor pulse rate

Robust Signal Handling

• Isolated inputs prevent ground loops and protect rack electronics from surges

• Integrated circuitry handles low-voltage magnetic pickup signals without external power

• Screw terminals accept up to 1.5 mm² (14 AWG) wiring for secure connections in high-vibration environments

Installation and Reliability

• Half-height form factor fits standard 3500 rack Keyphasor slots

• Direct internal termination reduces wiring complexity

• Industrial-grade operation ensures reliable performance from -30°C to +65°C

Technical Specifications

Applications

Ideal for machinery condition monitoring in turbines, compressors, generators, and rotating equipment. The 176449-04 ensures accurate speed and phase measurement for advanced vibration analysis and predictive maintenance systems.

FAQ

Q: Can this module be used with an external termination block?
A: No. The 176449-04 is specifically designed for internal termination configurations. External termination blocks require a different module version.

Q: How many shafts can this module monitor simultaneously?
A: It supports two independent Keyphasor channels, allowing either dual-shaft monitoring or redundant measurement of a single shaft.

Q: Is it compatible with SIL-rated systems?
A: Standard internal termination voltage is supported. For SIL-certified installations, verify voltage restrictions per system requirements.

Comparison to Similar Modules:

• External Termination I/O: Requires separate wiring to terminal strips; provides flexibility for complex installations.

• Internal Termination 176449-04: Direct rear-mount connection reduces wiring errors and enhances signal integrity.