991-06-70-01-CN | Bently Nevada 991 Series Thrust Transmitter

Product Overview

The Bently Nevada 991-06-70-01-CN provides critical axial position monitoring for high-speed rotating machinery. This transmitter drives a 3300 XL 8mm Proximity Probe and converts the eddy current signal into a linearized 4 to 20 mA DC output. This "rackless" solution enables direct communication with your PLC or DCS, eliminating the need for separate monitor racks. We supply this unit as 100% Brand New and Original in its factory-sealed packaging, backed by a full 12-month factory warranty.

Part Number Breakdown

The 991 series uses a modular coding structure to ensure the electronics match your specific machine and cable configuration:

Technical Specifications

The 991-06-70-01-CN delivers stable, high-fidelity data in demanding industrial environments:

• Output Signal: 4 to 20 mA DC (Proportional to axial thrust)

• Measurement Range: 0.6 mm - 0 - 0.6 mm

• System Compatibility: Designed for 3300 XL 8 mm Proximity Probes

• Electrical System Length: 7.0 meters (23.0 feet)

• Operating Temperature: -35°C to +85°C (-31°F to +185°F)

• Mounting: 35 mm DIN-rail (Option 01)

• Power Input: +17.5 to +30 Vdc

Engineering Advantages

• Hazardous Area Compliance: The "CN" approval provides necessary ATEX, IECEx, and NEPSI certifications. This allows for safe installation in explosive atmospheres, particularly within the Chinese industrial market.

• Direct Control Loop Integration: This transmitter eliminates the infrastructure costs of a centralized monitoring rack. It sends thrust data directly to your control system, making it an ideal choice for balance-of-plant equipment like pumps and motors.

• Optimized for Mid-Length Systems: The 7.0-meter system length option solves the problem of cable routing in larger machine enclosures where standard 5.0-meter cables fail to reach.

• Simplified Field Diagnostics: Each unit features a BNC connector providing a raw buffered signal. Reliability technicians can connect a portable analyzer to verify probe health and shaft behavior without interrupting the 4-20 mA protection loop.

FAQs

• Can I use a 5.0m or 9.0m cable with this transmitter?

•  No. This unit is calibrated specifically for a 7.0-meter total electrical system length. Using a different cable length will cause significant measurement errors and potentially lead to false trips or failed machine protection.

• Is this product used or refurbished? 

• No. We deliver only Brand New and Original Bently Nevada hardware. Each unit includes the factory serial number and ships in the original manufacturer’s packaging.

• Does this unit include the proximity probe? 

• The 991-06-70-01-CN is the transmitter only. Proximity probes and extension cables must be ordered separately to match your specific installation requirements.

• What is the benefit of the DIN-rail mounting? 

• The integrated 35 mm DIN-rail clips allow for rapid, "snap-on" installation in high-density electrical cabinets, reducing labor time and optimizing cabinet space.