Bently Nevada 3500/42M-04-00 Proximitor Seismic Monitor

The Bently Nevada 3500/42M-04-00 is a four-channel Proximitor/Seismic monitor for the 3500 machinery protection system. It accepts inputs from proximity, velocity, and acceleration transducers, conditioning signals to provide vibration and position measurements for critical rotating machinery. Featuring user-programmable alarm setpoints, it protects turbines, compressors, pumps, and other assets by triggering alerts when monitored parameters exceed safe thresholds.

  • Item No :

    3500/42M-04-00
  • Order(MOQ) :

    1
  • Payment :

    EXW/CIF
  • Product Origin :

    USA
  • Shipping Port :

    Wuhan
  • Lead Time :

    3-5days
  • Weight :

    5kg
  • Product Details

    General Information

     
     
    Attribute Specification
    Product Type Proximitor/Seismic Monitor
    Order Number 3500/42M-04-00
    Associated Part 135489-01 (I/O Module with internal barriers) 
    Series Bently Nevada 3500
    Channels 4

    Electrical & Performance Specifications

     
     
    Parameter Specification
    Power Consumption 7.7 W (typical) 
    Input Impedance 10 kΩ (standard I/O) 
    Output Impedance 550 Ω (buffered output) 
    Transducer Power Supply -24 VDC 
    Recorder Output +4 to +20 mA, 0–12 VDC 
    Frequency Range 10 Hz to 30,000 Hz 
    Accuracy ±0.33% (typical), ±1% (maximum) 
    Resolution 0.3662 A/bit 

    Input Signal Support

    • Proximity probes (eddy-current, 3300/7200 series)

    • Velocity sensors (Velomitor XA, CT)

    • Acceleration transducers

    • 4-20mA transmitter inputs 

    Front Panel Indicators

     
     
    LED Function
    OK Module operating normally 
    TX/RX Communication with other rack modules active 
    BYPASS Module is in bypass mode 

    Recommended Alternative Models

     
     
    Model Number Description Key Differences
    3500/42M-01-00 Proximitor/Seismic Monitor Different I/O module configuration; may lack internal barriers
    3500/42-01-CN Current replacement for older 3500/42 variants Active production model; updated design
    3500/70M Reciprocating Compressor Monitor Specialized for reciprocating machinery (high-impact vibration, cylinder pressure, rod drop); not interchangeable with 42M for standard radial vibration 
    EPRO MMS6120 Dual-channel bearing vibration/position monitor EPRO MMS6000 series; comparable to 3500/42M but from different manufacturer and not directly interchangeable 

    FAQs

    1: What sensors can the 3500/42M-04-00 accept?

    A: The module accepts inputs from proximity probes (eddy-current), velocity sensors, acceleration transducers, and 4-20mA transmitters . Configuration must match the sensor type used.

    2: When should I disable the Bias Current Check feature?

    A: Disable it when using seismic sensors (Velomitor, CT), third-party sensors, or 4-20mA transmitter inputs. The Bias Current Check is only valid for Bently Nevada proximity probes. Leaving it enabled on incompatible sensors triggers false faults.

    3: Is the 3500/42M hot-swappable?

    A: The 3500/42M can be replaced while the rack is powered, provided the associated monitoring channel is properly bypassed or isolated. Always verify the specific procedure in your site's Cause & Effect documentation before swapping.

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