Bently Nevada 3500/25-01-03-CN 3500/25 Enhanced Keyphasor Module

Description

The 3500/25-01-03-CN is a high-performance, half-height, two-channel machinery protection component designed to deliver phase reference and speed measurements within the Bently Nevada 3500 Series Machinery Protection System rack framework. This module processes incoming electrical signals from proximity probe transducers or passive magnetic pickups to establish a highly precise, digital once-per-turn or multiple-event-per-turn timing pulse. These generated phase reference pulses (Keyphasor signals) are transmitted directly via the 3500 system backplane to other monitoring modules and interconnected diagnostic software. This real-time processing enables the machinery protection system to compute shaft rotative speed, track synchronous vector tracking variables, and map specific vibration amplitudes alongside physical phase angles across fluid-filmed bearing assets.

The operational setup of the 3500/25 module incorporates a single half-height two-channel Keyphasor card variant mapped alongside an internal barrier I/O module type featuring dedicated internal compression screw terminations. The integrated internal safety barriers provide certified intrinsically safe connections for transducers running straight into hazardous deployment spaces. This configuration is designed to comply with strict international regulatory expectations while providing downward functional compatibility with older 3500 module versions, effectively replacing preceding components such as the PWA 125792-01 assembly.

Features

• Dual-channel speed and phase monitoring design providing once-per-turn and multi-event pulse conditioning.
• Integrated intrinsically safe internal barriers supporting direct connection to hazardous location transducers.
• Provides real-time phase reference mapping, 1X vibration amplitude vectors, and comprehensive speed diagnostics across the system rack backplane.
• Advanced capabilities including generation of once-per-turn timing pulses from high-density multi-event gear targets.
• Coaxial buffered front-panel interfaces and rear Euro-style connections providing clean raw transducer waveform telemetry.
• Built-in system health validation via dedicated front plate OK and communication status (TX/RX) LED arrays.

Applications

• Real-time phase reference logging and vector vibration tracking on utility steam and gas power turbines.
• Multi-channel shaft speed monitoring, overspeed trip integration, and zero-speed indexing across critical centrifugal air compressors.
• Structural phase matching and multi-plane field balancing on high-speed industrial process fans and fluid-filmed bearing gearboxes.

Ordering Information

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Rack Alignment Rules: Slide the main half-height processing card into any of the 14 available front monitor slots of the 3500 chassis using the dedicated half-height card guide adapter. Mount the corresponding full-height barrier I/O module into the rear slot directly opposing the main card assembly.
• Safety Intrinsic Wiring: Ensure all external field conductors entering the internal barrier I/O terminal block are installed strictly in accordance with factory document drawing 138547. Route intrinsically safe probe cables through separate, isolated wire trays away from all non-intrinsically safe power or machinery supply feeds.
• Electrostatic Control Procedures: A single-use conductive electrostatic grounding wrist strap must be worn and correctly terminated to the machinery rack structure when slotting the cards or moving local components to avoid irreversible circuit degradation.
• Chassis Monitoring Limits: Each single protection rack can support a maximum of two main Keyphasor processing modules, with one module allocated to the top half-slot line and the second located in the bottom half-slot line.

Compliance and Certifications

• EMC Directives: European Community Directive 2014/30/EU compliant via EN 61000-6-2 (Industrial Immunity) and EN 61000-6-4 (Industrial Emissions) verification.
• Electrical Safety Rules: European Community Directive 2014/35/EU compliant under standard EN 61010-1 parameters.
• Maritime Standards: Certified under DNV GL rules for maritime vessels/offshore installations alongside American Bureau of Shipping (ABS) Steel Vessels Rules Part 1 guidelines.
• RoHS Directive: Fully compliant under European Community RoHS Directive 2011/65/EU and China RoHS regulations maintaining a 15-year environment-friendly use period (EFUP).
• Hazardous Approvals: Class I, Zone 2 AEx/Ex nA nC ic [ia Ga] IIC T4 Gc and Class I, Division 2, Groups A, B, C, and D boundaries when used with internal safety barrier interfaces.