BENTLY 990-05-50-01-00 REV H Digital Qutput Termination

Product Detailed Description:

The Bently Nevada 990-05-50-01-00 is a precision conditioning amplifier designed specifically for use with Bently Nevada proximity probes (typically the 5000 series) and related sensors. Its primary function is to convert the high-impedance, low-level voltage signal generated by the probe into a standard, low-impedance 4 mA to 20 mA current loop output. This output is widely used in industrial process control and monitoring systems. The amplifier provides excellent signal conditioning, including amplification, filtering, and linearization, ensuring a stable and accurate representation of the measured parameter (usually shaft vibration, position, or displacement). It is known for its high reliability and compatibility within Bently Nevada monitoring systems.

Product Parameters:

• Input Signal: Typically designed for Bently Nevada 5000 series probes (e.g., 8mm or 11mm diameter). Input voltage range depends on the probe type and gap setting, but the amplifier processes the differential voltage signal from the probe coil.

• Output Signal: Standard 4 mA to 20 mA DC current loop.

• 4 mA typically represents the mechanical zero (e.g., 1.5 mm gap for an 8mm probe).

• 20 mA typically represents the mechanical full scale (e.g., 0.5 mm gap for an 8mm probe).

• Supply Voltage: Typically 24 VDC, but check specific datasheet for operating range (e.g., 18 VDC to 30 VDC).

• Load Resistance: Can typically drive loads up to 600 ohms, but this can vary. The loop power consumption is usually specified (e.g., 12 W maximum).

• Frequency Response: The bandwidth depends on the specific probe and gap setting but is generally suitable for monitoring machine vibration and position.

• Sensitivity: Determined by the probe type (e.g., mV/μm or V/mm).

• Environmental Ratings: Designed for industrial environments, often rated for temperatures (e.g., -40°C to +85°C), humidity, and vibration. May include NEMA or IP ratings depending on the specific housing or mounting configuration.

• Connection: Typically features terminal blocks for power supply, input from the probe, and output to the monitoring system or PLC.

Product Advantages:

• High Reliability: Built to stringent standards for use in critical rotating machinery monitoring.

• Precision Signal Conditioning: Provides accurate amplification, filtering, and linearization of the probe signal.

• Standardized Output: The 4-20 mA current loop is a widely accepted industrial standard, ensuring compatibility with most control systems, PLCs, and recorders.

• Noise Immunity: The current loop output is inherently more immune to electrical noise compared to voltage signals over long cable runs.

• Bently Nevada Integration: Seamlessly integrates with other Bently Nevada monitoring equipment, forming a complete machinery protection system.

• Longevity and Stability: Designed for long-term, stable operation in harsh industrial environments.

Precautions:

• Correct Probe Type: Ensure the amplifier is used with a compatible Bently Nevada probe (e.g., correct series and diameter).

• Proper Wiring: Follow the wiring diagram precisely. Incorrect wiring can damage the amplifier or the probe. Pay attention to polarity.

• Power Supply Stability: Use a stable, clean DC power supply within the specified voltage range.

• Load Matching: Do not exceed the maximum recommended load resistance for the output current loop.

• Environmental Limits: Operate the device within its specified temperature, humidity, and vibration limits.

• Grounding: Follow proper grounding procedures as recommended by Bently Nevada for the specific installation.

• Handling: Handle the device carefully to avoid physical damage. Avoid static discharge when handling.

• Calibration: While often stable, periodic verification or calibration may be recommended according to site procedures or system requirements.

Product Applications:

• Rotating Machinery Monitoring: Primarily used to monitor shaft vibration, position, or displacement in turbines, compressors, pumps, motors, and generators.

• Machinery Protection Systems: As a key component in systems designed to detect abnormal machine conditions and trigger alarms or shutdowns to prevent damage.

• Condition-Based Maintenance (CBM): Provides data for analyzing machine health and scheduling maintenance based on actual condition rather than fixed intervals.

• Process Control Integration: Feeds machine status information into larger Distributed Control Systems (DCS) or Programmable Logic Controllers (PLCs).

• Research and Development: Used in test rigs and experimental setups for precise measurement of mechanical movement.

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