990-05-70-02-01 Bently Nevada Vibration Transmitter | Get a Quote

Description

The 990-05-70-02-01 is a loop-powered vibration transmitter that integrates a non-contacting proximity probe sensor driver and analog signal conditioning electronics into a single module. It measures standard radial shaft vibration on rotating machinery and outputs a continuous 4 to 20 mA current loop signal directly to a PLC, DCS, or SCADA system. This direct-to-control architecture eliminates the necessity of a separate, dedicated monitoring rack. By utilizing eddy current measurement principles, the transmitter monitors dynamic shaft movement without mechanical wear, delivering reliable protection data for plant operations.

Features

• Integrated driver and signal conditioner design reduces panel space requirements.
• Direct 4-20 mA output interfaces smoothly with standard industrial control platforms.
• Non-contacting eddy current measurement eliminates mechanical friction and wear.
• Accessible front BNC connector delivers buffered raw vibration signals for diagnostics.
• Solid-state circuit protection guards against wiring errors and voltage surges.
• Robust environmental design engineered for placement in harsh industrial process areas.

Applications

• Centrifugal air compressor vibration monitoring.
• Small industrial fan and process blower protection.
• Cooling tower fan mechanical protection loops.
• Industrial centrifugal pump shaft tracking.
• Electric motor and generator asset monitoring.
• Hydroelectric turbine rotor displacement analysis.

Ordering Information

Technical Specifications

Installation Guidelines

• Mechanical Mounting: Install the transmitter securely onto a clean 35mm DIN rail inside a protective field enclosure.
• Transducer Placement: Install the proximity probe and extension cable at the designated machine bearing housing. Maintain a minimum cable bend radius of 25.4 mm (1 in) to prevent internal core damage.
• Cable Routing: Route the extension cable to the transmitter location. Avoid routing probe cables parallel to high-voltage power lines or variable frequency drive wiring to minimize electrical noise.
• Coaxial Connection: Connect the probe extension cable to the coaxial connector located on the bottom of the transmitter housing.
• Loop Wiring: Wire the 4-20mA loop power source to the transmitter terminal block. Ensure correct polarity is maintained: Terminal 1 (+) and Terminal 2 (-). Isolate the power supply before connecting any field wires.
• Shield Grounding: Terminate the cable shields properly at the control room instrument ground only. Do not ground the shield at both ends to prevent destructive ground loops.