The Bently Nevada 991-06-XX-01-05 MOD:164113-01 is a specialized 2-wire, loop-powered thrust transmitter designed for monitoring axial shaft displacement. This device is engineered for integration into machinery control systems, providing a standard 4 to 20 mA output proportional to the shaft's axial position. It is primarily utilized by original equipment manufacturers (OEMs) for monitoring non-critical rotating machinery such as centrifugal air compressors, small pumps, motors, and fans.

Features

• Integrated Proximitor sensor functionality, eliminating the need for an external sensing unit.
• Power-up Inhibit circuit designed to prevent signal errors caused by line voltage transients.
• Potted construction for high reliability in high-humidity environments (up to 100% condensing).
• Flexible mounting options including 35 mm DIN-rail clips or bulkhead mounting screws.
• Compatible with Bently Nevada 3300 NSv proximity probes and matching extension cables.

Applications

• Centrifugal Air Compressors: Provides real-time axial position data to OEM control systems.
• Small Pumps and Motors: Offers a simple 4-20 mA interface for standard industrial assets.
• Industrial Fans and Blowers: Monitors axial displacement to detect potential mechanical issues.
• Oil, Gas, and Petrochemical: Suitable for monitoring critical rotating assets in processing plants.
• Power Generation: Used for basic monitoring of auxiliary motors and small rotating equipment.

Technical Specifications

Installation Guidelines

• Ensure the system is powered down before performing any wiring or module installation.
• The unit is designed for 35 mm DIN-rail mounting; ensure the rail is properly grounded to the cabinet chassis.
• Use shielded twisted-pair cabling for the 4-20 mA loop to minimize EMI interference.
• Maintain proper separation between signal wiring and high-voltage power lines.
• Verify that the proximity probe and extension cable lengths match the transmitter configuration (5m or 7m).
• Handle with care to avoid damage to the potted housing and connector interfaces.

FAQ

What is the Bently Nevada 991-06-XX-01-05?

The 991 is a 2-wire, loop-powered transmitter designed for measuring shaft thrust (axial position) in rotating machinery. It provides a 4-20 mA proportional signal for direct input into machine control systems.

Does the 991-06-XX-01-05 need an external Proximitor?

No, the unit features an integrated Proximitor sensor, which eliminates the requirement for an external unit.

What proximity probes are compatible with this transmitter?

This transmitter is designed to work specifically with Bently Nevada 3300 NSv proximity probes and their corresponding 5-meter or 7-meter extension cables.