990 Series | Bently Nevada 990-05-70-01-00 Vibration Transmitter

Product Overview

The Bently Nevada 990-05-70-01-00 acts as a specialized 2-wire vibration transmitter that integrates Proximitor sensor functionalities into a single, compact housing. It simplifies machinery monitoring by outputting a standard 4-20 mA DC signal proportional to radial vibration. Designed specifically for integration with PLC and DCS architectures, this unit eliminates the requirement for centralized monitoring racks. We provide this product as 100% brand new and original equipment, manufactured in the USA.

Part Number Breakdown

The 990-05-70-01-00 utilizes the following technical configuration:

Technical Specifications

The unit converts complex eddy current signals into precise analog data:

• Output Signal: 4 to 20 mA DC (Proportional to peak-to-peak vibration).

• Measurement Range: 0 to 125 μm (0 to 5 mils) peak-to-peak.

• System Calibration: Fixed for 7.0-meter probe/cable combinations.

• Power Requirement: 12 to 35 Vdc (Loop-powered).

• Mounting Type: Secure DIN rail interface.

• Origin: Made in U.S.A.

Engineering Advantages

• Direct Field Integration: The transmitter installs near the machine skid, reducing the need for long, expensive coaxial cable runs back to a control room. The robust 4-20 mA signal travels over standard twisted-pair wiring with high resistance to electromagnetic noise.

• Extended Reach with 7m Calibration: The "70" system length option provides additional flexibility during installation. It allows engineers to route extension cables through complex conduit paths or larger machine frames where standard 5-meter systems fall short.

• Efficient Cabinet Utilization: The 35 mm DIN rail clips facilitate rapid high-density mounting. This design maximizes enclosure space, allowing multiple vibration points to be monitored from a single compact junction box.

• Simplified Maintenance: A dedicated test input allows technicians to verify loop performance using a function generator. This feature permits full loop checks from the transmitter to the DCS without disturbing the proximity probe installation.

FAQs

• Can I use this 7-meter transmitter with a 5-meter probe/cable set?

  No. The internal circuitry is calibrated for the specific impedance and electrical length of a 7.0-meter system. Using a different length will cause significant measurement errors and non-linearity.

• Does this unit support 3300 XL 8mm probes?

  Yes, this transmitter typically interfaces with Bently Nevada 3300 XL 8mm probes and extension cables, provided the total electrical length equals 7.0 meters.

• What happens if the probe signal is lost?

  The transmitter features an "OK" circuit logic. If the probe signal disappears or the cable breaks, the 4-20 mA output typically drops below 3.6 mA, signaling a "Not OK" status to your control system to prevent false vibration alarms.

• Is this product used or refurbished?

  Absolutely not. We only supply brand new, original factory units to ensure the integrity of your machinery protection system.