Description

The Bently Nevada 24765-01-01 is a high-performance dual-channel vibration and position monitoring module designed for the 3500/42M Machinery Protection System, part of Bently Nevada’s industry-leading portfolio now under Emerson Automation Solutions. As a core component of critical machinery protection strategies, the Bently Nevada 24765-01-01 continuously acquires, processes, and evaluates dynamic signals from proximity probes, velocity sensors, or accelerometers to detect abnormal conditions such as imbalance, misalignment, bearing wear, or rubs in rotating equipment. It provides real-time analog outputs, programmable alarm logic, and failsafe relay contacts that can trigger alarms or initiate emergency shutdown sequences—ensuring compliance with API 670 and functional safety standards.

Engineered for use in oil & gas, power generation, chemical processing, and industrial turbomachinery applications, the Bently Nevada 24765-01-01 integrates seamlessly into the 3500 rack architecture, communicating with the 3500/22M or 3500/25 interface modules for data transmission to plant DCS, SCADA, or asset management platforms like System 1. Each channel supports independent configuration for measurement type (displacement, velocity, acceleration), full-scale range, filter settings, and alarm thresholds. With its robust design, diagnostic capabilities, and compliance with international safety norms, the Bently Nevada 24765-01-01 delivers unmatched reliability in protecting multi-million-dollar assets from catastrophic failure.

Technical Specifications

Main Features and Advantages

Dual independent channel processing: The Bently Nevada 24765-01-01 allows two separate sensor inputs to be monitored with fully independent signal conditioning, filtering, and alarm logic. This enables simultaneous monitoring of radial X/Y shaft positions on a single bearing or axial thrust and radial vibration on a compressor—maximizing rack density and reducing cost per measurement point.

Advanced signal analysis and filtering: Each channel features programmable high-pass and low-pass filters, enabling users to isolate specific frequency bands (e.g., 1X for imbalance, 2X for misalignment). The Bently Nevada 24765-01-01 also supports gap voltage monitoring for proximity probes, ensuring sensor health and preventing false trips due to probe drift or cable faults.

Robust alarm and relay logic: With four Form C relays (two per channel), the Bently Nevada 24765-01-01 supports flexible alarm configurations—including warning, danger, and latching/non-latching trip logic. Relays are fail-safe by design: they de-energize on power loss or internal fault, ensuring safe shutdown initiation even during system anomalies.

Seamless integration with 3500 ecosystem: The module communicates via the 3500 backplane to interface modules (3500/22M, 3500/25) for Modbus TCP, Ethernet/IP, or serial communication to higher-level systems. All configuration, calibration, and diagnostics are performed through Rack Configuration Software (RCS) or System 1, enabling remote access and historical trending.

Compliance with global safety standards: Designed to meet API 670 requirements for machinery protection and suitable for use in SIL-rated applications when deployed in appropriate architectures, the Bently Nevada 24765-01-01 is certified for hazardous areas (ATEX/IECEx Zone 2) and carries full EMC immunity for industrial environments.

Application Field

The Bently Nevada 24765-01-01 is a cornerstone of machinery protection in industries where unplanned downtime or equipment failure carries severe operational, financial, or safety consequences. In natural gas compression stations, it monitors centrifugal compressors for bearing wear or surge-induced vibrations, triggering automatic shutdowns before rotor contact occurs. Within combined-cycle power plants, the Bently Nevada 24765-01-01 safeguards steam and gas turbines by continuously evaluating shaft eccentricity, vibration amplitude, and thrust position—critical parameters during startup, synchronization, and load changes.

In petrochemical refineries, the module protects critical pumps handling high-temperature hydrocarbons, where seal failure due to excessive vibration could lead to fire or environmental release. Similarly, in liquefied natural gas (LNG) trains, it ensures cryogenic turboexpanders operate within strict vibration limits at -160°C, where maintenance access is extremely limited. Beyond continuous processes, the Bently Nevada 24765-01-01 is also used in marine propulsion systems, wind turbine gearboxes, and large HVAC chillers—any application involving high-speed, high-value rotating machinery requiring reliable, code-compliant protection. By delivering precise, real-time insight into machine health, the Bently Nevada 24765-01-01 transforms raw sensor data into actionable safety intelligence.

Related Products

• Bently Nevada 3500/22M: Enhanced interface module for Modbus TCP communication from the 3500 rack.

• Bently Nevada 3500/25: Standard interface module with RS-232/422 output for legacy DCS integration.

• Bently Nevada 3300 XL 8mm: Eddy-current proximity probe commonly paired with 24765-01-01.

• Bently Nevada 9262-01: Velocity sensor compatible with the 24765-01-01 for casing vibration monitoring.

• Bently Nevada 24765-01-02: Updated firmware revision with enhanced diagnostics or extended frequency range.

• Emerson System 1: Asset health platform that aggregates data from 24765-01-01 modules across the plant.

• Bently Nevada 3500/15: Power supply module required for 3500 rack operation alongside 24765-01-01.

Installation and Maintenance

Pre-installation preparation: Before installing the Bently Nevada 24765-01-01, ensure the 3500 chassis is powered off and properly grounded. Verify that the backplane firmware supports this module version and that sufficient slot space is available (typically occupies one standard slot). Confirm sensor cabling is shielded, twisted-pair, and grounded at the monitor end only to avoid ground loops. Use Rack Configuration Software (RCS) to pre-load channel settings—such as input type, full-scale range, and alarm thresholds—before commissioning.

Maintenance recommendations: Although the Bently Nevada 24765-01-01 is solid-state and requires no routine calibration, periodic validation is recommended. Perform bump tests using the Test Input feature to verify alarm relay operation and analog output scaling. Review historical trends in System 1 for slow-developing issues like bearing degradation. Inspect terminal blocks for corrosion or loosening, especially in humid or corrosive environments. If a channel fault is indicated, cross-check with sensor diagnostics (e.g., gap voltage) before replacing the module. Always maintain a spare Bently Nevada 24765-01-01 for rapid recovery in critical service.