Transmitter Bently Nevada 990-04-XX-01-05 MOD 165335-01

Product Overview

The Bently Nevada 990-04-XX-01-05 MOD 165335-01 is a compact, loop-powered 2-wire proximity vibration transmitter for machinery protection. It interfaces directly with eddy current probe systems, converting non-contact shaft vibration into an industry-standard 4-20 mA analog signal. The MOD 165335-01 modification allows operators to transmit critical radial vibration or axial thrust metrics directly to any DCS, PLC, or SCADA system without intermediate monitor racks.

Technical Configuration

Core Technical Advantages

This transmitter features an integrated Proximitor design that conditions signals locally to minimize panel footprints and field cabling costs. The MOD 165335-01 modification profile guarantees high-accuracy calibration and noise isolation in demanding environments. Pre-installed 35 mm DIN rail clips enable high-density setup in local junction boxes, while an onboard Not OK/Signal Defeat circuit prevents false alarms from loose connections.

Technical Specifications

Installation Guide

Mechanical Mounting and Environment

Snap the housing onto a 35 mm DIN rail inside an environmental enclosure. Keep ambient temperatures within the -40°C to +85°C operating limit. Mount the module clear of high-current conduits to prevent electromagnetic induction.

Field Setup and Gapping

Connect the proximity probe and extension cable to the coaxial input port. Attach a multimeter to the PROX OUT BNC connector to monitor the DC gap voltage. Adjust the physical probe gap until it reads approximately -10 V DC before securing the mount.

Loop Wiring Regulations

Use high-quality twisted, shielded cable pairs for the loop circuit. Terminate the shield drain wire solely at the main control cabinet ground bus (DCS/PLC side). Leave the shield floating at the transmitter head to eliminate ground loops.

Engineering Advantages

Cost-Optimized System Integration

The 990-04-XX-01-05 MOD 165335-01 cuts hardware costs by routing data straight to existing control systems. It drops the need for intermediate machinery protection racks while maintaining real-time diagnostics via the onboard dynamic BNC tap.

Ruggedized Compliance Profiles

Certified with ATEX Zone 0/2, CSA Class I Division 2, and ABS maritime approvals, this transmitter functions reliably in hazardous chemical atmospheres, offshore platforms, and highly corrosive marine environments.

Technical FAQs

Q1: What does the MOD 165335-01 designation represent on this model?

A1: The MOD 165335-01 indicates a specific factory modification that optimizes the transmitter's internal filtering or grounding profiles to meet specialized system architecture requirements.

Q2: How can field engineers perform diagnostics using the built-in BNC port?

A2: The dynamic PROX OUT BNC jack outputs the raw, unfiltered waveform signal directly. Technicians can connect portable analyzers to view real-time shaft orbit plots and frequency spectrums.

Q3: How does the transmitter handle a sudden field cable break?

A3: The transmitter uses a built-in Not OK diagnostic mechanism. If a cable breaks or shorts, the loop current drops below 3.6 mA, triggering a transducer fault alert on the connected PLC or DCS.