Bently Nevada 176449-02 3500/42M Proximitor Seismic Monitor

Description

The 176449-02 is a four-channel machinery protection instrument designed for continuous monitoring and critical asset shutdown verification. This high-density 3500/42M Proximitor Seismic Monitor module accepts inputs from proximity transducers, velocity sensors, and accelerometers, conditioning the raw analog waveforms to extract precise static variables such as radial vibration, thrust position, eccentricity, differential expansion, or shaft absolute parameters. The hardware configuration designated by part number 176449-02 consists of the main 3500/42M processor module coupled with a dedicated Prox/Seismic I/O Module with internal terminations. The system processes monitor channels in programmable pairs, allowing each pair to run different algorithms to execute machinery alarms and drive safety alert/danger relay logic independently. Monitored variables are continuously compared against user-programmed setpoints to protect large industrial machinery, such as steam turbines, centrifugal compressors, and heavy-duty pumps, while streaming static data and buffered dynamic signals through the backplane to a Transient Data Interface (TDI) for advanced diagnostic analysis.

Features

• Four-Channel Hardware Processing: Continuously conditions and monitors up to four individual transducer signals simultaneously within a single rack slot footprint.
• Dual-Channel Pairing Flexibility: Programs monitor channels in pairs to perform up to two distinct vibration, position, or velocity measurement profiles concurrently.
• Internal Termination System: Integrated I/O module design allows field wiring cables to connect directly to the onboard terminal blocks without external termination panels.
• Comprehensive Parameter Extraction: Conditions raw transducer data to report multiple parameters, including peak-to-peak amplitude, average values, or specific tracking filters.
• Advanced REBAM Configuration: Supports specialized rolling element bearing activity monitoring algorithms when linked with high-resolution proximity probes.
• Onboard Sensor Diagnostics: Built-in transducer OK monitoring sub-circuits track sensor supply faults and lead breakdown, automatically suppressing false trips.

Applications

• Radial Vibration and Shaft Orbit Profiling on High-Speed Gas Turbines
• Thrust and Axial Displacement Fault Detection in Multistage Compressors
• Casing Acceleration and Bearing Housing Velocity Measurements on Industrial Fans
• Rolling Element Bearing Performance Analytics (REBAM) on Heavy Machinery Processes
• Machinery Protection and Automatic Emergency Safety Trip Chains

Ordering Information

The verified option matrix below matches the specific hardware combination representing the 176449-02 assembly:

Technical Specifications

Electrical

Mechanical

Environmental

Connections/Interfaces

The rear I/O module with internal terminations provides direct screw terminal interfaces mapped below:

Installation Guidelines

• Module Core Alignment: Slide the main 3500/42M monitoring processor card into any available full-height instrument slot of the 3500 chassis, ensuring it shares the exact slot column as the 128229-01 rear I/O card.
• Shield Grounding Best Practice: Terminate sensor cable shields securely at the rear I/O chassis ground terminals. Do not bond the cable shield at both the transducer end and the monitor rack end to prevent ground loops.
• Preventative Venting Clearance: Leave sufficient air intake routing gaps unobstructed at both the top and bottom sections of the main chassis to maintain constant operational cooling flow across the module.
• Wiring Torque Specifications: Tighten field interface conductors inside the internal termination screw clamp blocks using a standard terminal driver to a torque value between 0.56 and 0.79 N-m (5 to 7 in-lb).