Description

The Bently Nevada 990-05-XX-03-CN (Internal Part Number: 104M6732-01) is a high-accuracy, loop-powered 2-wire vibration transmitter engineered to provide continuous, standalone machinery asset protection. This field-rugged industrial instrument integrates the functionality of a proximity sensor conditioner and transmitter into a single unified circuit block, converting raw non-contacting proximity probe inputs directly into an industry-standard 4-20 mA analog current loop output proportional to overall shaft vibration. The 990-05-XX-03-CN 104M6732-01 accepts dynamic electrical signals from a standard proximity probe array and processes raw peak-to-peak displacement, delivering an immediate, linear current stream to local programmable logic controllers (PLCs), distributed control systems (DCSs), or SCADA platforms. Designed specifically with space-restricted and safety-critical machinery skids in mind, it interfaces with external measurement loops without requiring an intermediate Proximitor sensor housing. It features physical terminal integration supporting a 4-20 mA current output loop, separate dynamic voltage output points for portable vibration analyzers, and special hardware certification variants for localized control markets.

Features

• Integrated 2-wire transmitter design providing a direct 4-20 mA proportional current output path without intermediate signal conditioners.
• Dynamic voltage output terminal provisioning real-time raw proximity waveforms directly to field analyzers.
• Robust electrical isolation and solid-state encapsulation to eliminate electrical noise interference inside tight machine enclosures.
• Seamless host system integration linking directly with any control interface featuring standard analog current input blocks.
• Designed for high-reliability vibration tracking across thin fluid-filmed bearing shells and rotating shaft assemblies.

Applications

• Continuous radial vibration and casing displacement tracking on centrifugal air and process gas compressors.
• Critical machinery safety loops on high-speed industrial fans, cooling pumps, and fluid-handling blowers.
• Standalone balancing and predictive maintenance monitoring across small-scale power generation turbines.

Ordering Information

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Surface Chassis Mounting: Fix the transmitter block securely onto a clean, unpainted, vibration-isolated instrument panel inside an electrical enclosure. Verify proper physical layout alignment to prevent internal structural stress.
• Proximity Probe Connection: Direct the primary proximity transducer coaxial lead wire straight into the designated input terminal channel block. Keep the internal signal wires separate from any high-voltage motor electrical conduits.
• Loop Power Verification: Check the overall loop resistance parameters and source power input ratings before energizing the 4-20 mA current network lines to avoid unexpected component strain.
• Dynamic Terminal Shielding: Ensure the dynamic voltage output terminal covers are completely sealed when not hooked up to local portable instruments to keep moisture and dust off the diagnostic contacts.