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GEL 2472 - Speed Sensor

The MiniCODER family from Lenord + Bauer offers spacesaving solutions for the contactless measurement of rotational movements with direction sensing.
The MiniCODERS operate from 0 Hz on for the detection of very slow movements without pulse loss and up to 20 kHz for the direct integration into high-speed motors and machines.

The high interference immunity ensures reliable function even under adverse operating conditions.
The MiniCODER GEL 2472 accomodates two independent measuring systems in one housing permitting connection of two different electronic control systems, e.g. wheel slip prevention and traction control. This configuration also permits the use of different supply voltages.

Main features

  • module range from m = 2.0 to m = 3.0
  • measuring frequency from 0 to 20 kHz
  • simple flange-mounting
  • robust stainless steel casing
  • customized cable fittings
  • very high protection class IP 68
  • wide temperature range -40 °C to +120 °C
  • high electromagnetic compatibility

    • Fields of application

    rail vehicles
       - traction control
       - anti-skid protection and wheel slip prevention
       - motor speed control
       - vehicle speed

    Output signals

    Two electrically isolated systems that can be combined from
    system 1 optionally:
    • one square-wave signal and one direction signal
    • one square-wave signal
    • two 90°-shifted square-wave signals for direction sensing
    and system 2:
    • one square-wave signal



    Technical data


    Electrical data
    Supply Voltage Ub =10...20V DC, reverse polarity protected
    Current consumption without load IB ≤ 40 mA
    Output Signals electrically isolated, push-pull driver Imax=20 mA
    Input and output frequency 0... 20kHz
    Duty 0.5 +/- 0.25
    Rise time(2m cable) ≥ 10V/μs
    Max. cable length 100m
    Electromagnetic compatibility*

        Case 1: screen connected to housing

        Case 2: screen not connected to housing

    rail vehicles: EN 50121-3-2
    industry applications: EN 61000-6-1 to 4
    rail vehicles: test in according with EN 50121-3-2 1)
    Insulation resistance 500 V
    Connection fully potted cable outlet with stress relief, 2x4x0,5mm2
    separated screen
    cable specification: please request seprately
    Mechanical data
    Module m=2.0;3.0
    (other modules available on request)
    Admissible air gap depending on module, frequency and temperature range up to max. 1.5 mm
    Working and operating temperature range -40 °C...+120 °C
    Storage temperature range -40 °C...+120 °C
    Protection class IP 68
    Vibration resistance (EN 60068 part 2-6) 200 m/s2
    Shock resistance (EN 60068 part 2-27) 2000 m/s2
    Width of the target wheel ≥ 20mm taking into account all tolerances
    Form of the target wheel standard: m=2.0 to 3.0, involute teeth according to DIN 867
    Material of the target wheel ferromagnetic steel
    Weight with 2 m cable without fittings approx. 550g
    Housing stainless steel



    Dimensions



    Output level (typical course)

    Dimensions GEL 2472

    Cable core assignment

    Signal pattern GEL 2472


    Signal pattern S:
    Sense of rotation low for clockwise
    rotation (see installation drawing)
    Signal pattern V:
    Track 2 leading track 1 for clockwise
    rotation (see installation drawing)



    EMC installation advice and ESD instructions


    EMC installation advice

    • Connect the screen at the end of the cable using a large contact surface, if possible.
    • Keep all unscreened cables as short as possible.
    • Keep grounding connections as short as possible using large cross-sections (low-induction grounding strip, ribbon cable)
    • Lay signal and control cables away from power lines.
    • The power supply must correspond to installation class 0 or 1 in according with B.3 of EN 61000-4-5 of 1995.

    ESD instructions

    As with any other electronic device, when connecting the MiniCODER suitable precautions against electrostatic discharge must be taken. Do not touch connector pins and connecting wires without such precautions.
    Observe the guidelines in EN 100015-1.

    Installation drawing

    All dimensions in mm




    Examples of customized cable connections,
    Type code


    Encoder end




    standard cable



    rubber conduit



    flexible conduit

    Cable end




    flexible conduit connection and cable end open



    rubber conduit and cable end open



    connector with shrink moulded sleeve


    Type code GEL 2472




    Ordering information

    If customized cable, conduit and connectors are required, please supply detailed specifications.
    Module specification not required for signal types EE or E0 within a range m = 2.0 to m = 3.0.