Product Overview

The Bently Nevada 125680-01 is a specialized 4-channel Proximitor Input/Output (I/O) module engineered for the 3500/40M monitoring system. This hardware component serves as the physical termination point for proximity transducers, providing the critical signal conditioning required to translate raw sensor data into actionable machinery health metrics. By utilizing an internal termination design, the 125680-01 allows for direct field wiring to the rack backplane, simplifying installation and reducing the need for external terminal blocks.

Designed for high-reliability machinery protection, the 125680-01 facilitates the continuous monitoring of shaft behavior in rotating equipment. It supports a wide array of measurement types, including radial vibration, axial thrust position, and eccentricity. The module ensures that high-fidelity signals are delivered to the 3500/40M monitor, enabling the system to execute rapid trip logic and protect critical industrial assets from mechanical failure.

Technical Characteristics

• Channel Capacity: Supports up to four independent monitoring channels.

• Termination Style: Internal Terminations for space-efficient, direct field wiring.

• Signal Compatibility: Engineered specifically for Proximitor sensors and 3300 XL series transducers.

• Measurement Suite: Supports Radial Vibration, Thrust Position, Differential Expansion, Eccentricity, and REBAM.

• Configuration Flexibility: Channels are managed in pairs, allowing for independent function assignment (e.g., Ch 1/2 for Vibration, Ch 3/4 for Position).

• Signal Processing: Advanced conditioning of input signals into high-precision static and dynamic values.

• Alarm Integration: Fully compatible with user-programmable Alert and Danger setpoints within the 3500 framework.

• System Series: Part of the Bently Nevada 3500 Machinery Protection System (compatible with 3300 series transducers).

• Dimensions: 2.5 cm x 11.2 cm x 24.2 cm.

• Weight: 0.38 kg.

• Country of Origin: USA.

Critical Monitoring and Application

The 125680-01 is fundamental for facilities requiring precise displacement and vibration tracking on high-speed turbines, compressors, and pumps. By providing a clean, shielded interface for proximity probes, it minimizes signal noise and prevents interference from disrupting sensitive measurements. This is particularly vital in applications like Thrust Position monitoring, where sub-millimeter changes in shaft location must be detected to prevent catastrophic internal contact.

The module's dual-pair configuration allows plant engineers to optimize their rack hardware, managing multiple monitoring disciplines within a single I/O footprint. This modularity, combined with the ruggedness expected of Bently Nevada hardware, ensures that the 125680-01 remains a reliable link in the machinery protection chain. It provides the essential data stream required for both automated safety shutdowns and predictive maintenance analysis through System 1 software integration.