Description
Bently 990-04-70-01-00
Technical Specifications
- Product Series: Bently 990 Series
- Sensor Type: Eddy Current Sensor Compatible
- Output Type: 4mA to 20mA Current Loop
- Power Supply: Loop-powered (+12 to +35 VDC)
Functional Features
- Signal Conditioning: Converts raw proximity probe signals into proportional vibration peak-to-peak values.
- Direct DCS Integration: Provides a standard industrial current loop for continuous monitoring, alarming, and logic control.
- High Accuracy: Maintains precise linear relationship between the probe gap and the output current.
Application Scenarios
Widely applied in steel, power, metallurgy, and petrochemical industries for monitoring fans, reciprocating compressors, electric motors, water pumps, and centrifuges.
Performance Parameters
- Scale Factor: 200 mV/mil
- Current Loop Range: 0-4 mils pp = 4-20 mA
- Proximity Range: 10 – 65 mils
Material Composition
Industrial-grade electronic components housed in a robust metallic enclosure designed for harsh environments.
Structural Characteristics
Compact module designed for DIN rail mounting or panel integration, featuring clearly labeled terminal blocks.
Working Principle
Receives high-frequency impedance variations from the eddy current probe, demodulates the signal, and outputs a proportional 4-20 mA current representing the vibration amplitude.
Installation Requirements
Must be installed in a dry environment. Ensure proper grounding and use shielded cables compatible with Bently specifications to prevent electrical noise interference.
Usage Precautions
Connecting grounded AC-powered equipment to the Prox output may cause false alarms. Always use the recommended test adapter when working with AC equipment.
