BENTLY 125680-01
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BENTLY 125680-01

BENTLY 125680-01 is a Proximitor I/O Module with Internal Terminations, a core component of Bently Nevada’s 3500/40M Proximitor Monitor, designed to interface with Bently Proximitor® sensors for precise vibration, position, and expansion monitoring. It conditions 4-channel proximity transducer signals, converts them to calibrated outputs, and enables user-programmable alarms for machinery protection. BENTLY 125680-01 integrates seamlessly with the 3500 rack system, using internal terminations to simplify wiring and reduce installation complexity. BENTLY 125680-01 supports functions like radial vibration, thrust position, eccentricity, differential expansion, and REBAM monitoring, making it ideal for critical rotating machinery. BENTLY 125680-01 also provides -24 VDC transducer power and high-accuracy signal conversion, ensuring reliable data for predictive maintenance and system integration with DCS/PLC via the 3500/40M module.

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Product Description

BENTLY 125680-01 is a Proximitor I/O Module with Internal Terminations, a core component of Bently Nevada’s 3500/40M Proximitor Monitor, designed to interface with Bently Proximitor® sensors for precise vibration, position, and expansion monitoring. It conditions 4-channel proximity transducer signals, converts them to calibrated outputs, and enables user-programmable alarms for machinery protection. BENTLY 125680-01 integrates seamlessly with the 3500 rack system, using internal terminations to simplify wiring and reduce installation complexity. BENTLY 125680-01 supports functions like radial vibration, thrust position, eccentricity, differential expansion, and REBAM monitoring, making it ideal for critical rotating machinery. BENTLY 125680-01 also provides -24 VDC transducer power and high-accuracy signal conversion, ensuring reliable data for predictive maintenance and system integration with DCS/PLC via the 3500/40M module.

Product Parameters

  • Module Type: Proximitor I/O Module with Internal Terminations (3500/40M-compatible)
  • Core Function: Signal conditioning for proximity transducers; 4-channel monitoring of vibration/position/expansion
  • Sensor Compatibility: Bently Proximitor® transducers (2-wire/3-wire)
  • Input Channels: 4 dedicated channels; input impedance 10 kΩ
  • Output Signals: Voltage outputs proportional to gap distance; output impedance 550 Ω
  • Calibration Ranges: Radial vibration/thrust/eccentricity: 3.94/7.87 mV/μm; differential expansion: 0.394/0.787 mV/μm; REBAM: 40/80 mV/μm
  • Transducer Power: -24 VDC (rack-supplied)
  • Power Consumption: 7.7 Watts (typical)
  • Frequency Response: Programmable 0.152–8678 Hz (direct filter); 4–4000 Hz (user filter)
  • Accuracy: ±0.33% typical, ±1% max full-scale
  • Physical Specs: 2.5×11.4×24.1 cm (1.0×4.5×9.5 in); weight 0.4 kg (0.88 lbs)
  • Configuration: 3500 Rack Configuration Software; non-volatile memory
  • Key Features: Internal terminations, 4-channel parallel processing, self-diagnostics, alarm relay integration

Advantages and Features

  1. Simplified Wiring with Internal Terminations

    BENTLY 125680-01 eliminates external terminal blocks, reducing field wiring time and minimizing connection errors for 3500/40M systems.

  2. Multi-Function Monitoring Flexibility

    Supports 5 critical machine monitoring functions (radial vibration, thrust, eccentricity, differential expansion, REBAM) with configurable ranges for diverse industrial machinery.

  3. High-Precision Signal Conversion

    24-bit ADC and ±0.33% typical accuracy ensure BENTLY 125680-01 delivers reliable data for early fault detection and predictive maintenance.

  4. Seamless 3500 System Integration

    Designed for plug-and-play compatibility with the 3500/40M monitor and 3500 rack, BENTLY 125680-01 enables fast setup and integration with 3500 system software.

  5. Rugged Industrial Reliability

    Rack-mounted design, wide operating temperature range (-40°C to +70°C), and low power consumption ensure stable performance in harsh industrial environments.

Application Cases in Application Fields

  • Power Generation: Used in steam/gas turbines to monitor rotor radial vibration and thrust position via BENTLY 125680-01, triggering alarms for bearing wear or misalignment.
  • Oil & Gas: Deployed on compressors and pumps to track eccentricity and differential expansion, preventing seal failures and unplanned downtime.
  • Chemical Processing: Monitors reactor agitator shaft position with BENTLY 125680-01, ensuring safe operation and compliance with process safety standards.
  • Paper Manufacturing: Integrates with 3500/40M to monitor roll eccentricity, optimizing production quality and reducing maintenance costs.

Comparisons with Competing Products

Parameter BENTLY 125680-01 Allen-Bradley 1756-IF16 Siemens S7-1500 AI 8×RTD/TC
Core Function Proximitor signal conditioning (4-channel) 16-channel analog input (general-purpose) 8-channel RTD/TC temperature input
Sensor Compatibility Bently Proximitor® transducers Universal analog sensors RTD/thermocouples only
Calibration Ranges Application-specific (vibration/position) Fixed 0–10 V/4–20 mA Fixed temperature ranges
System Integration Native 3500/40M compatibility ControlLogix PLC TIA Portal/S7-1500 PLC
Internal Terminations Yes (reduces wiring) No (external terminals) No (external terminals)
Cost-Effectiveness High (targeted monitoring) Medium (general-purpose) Low (limited to temperature)

Selection Suggestions and Precautions

Selection Suggestions

  • Choose BENTLY 125680-01 for 3500/40M-based proximity monitoring of critical rotating machinery requiring internal terminations and multi-function vibration/position measurement.
  • Opt for this module if you need high-accuracy signal conditioning for Proximitor transducers and seamless integration with the 3500 machinery protection system.

Precautions

  • Use only Bently Proximitor® transducers to ensure measurement accuracy and compatibility with BENTLY 125680-01.
  • Follow 3500 rack power guidelines (-24 VDC) to avoid damage to the module or connected sensors.
  • Calibrate channels via 3500 Rack Configuration Software and verify alarm setpoints before deployment.
  • Adhere to internal termination wiring diagrams to prevent signal interference or incorrect readings.

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