Frequency Converter
AD-FM 300; AD-FM 600

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The FM300(1-channel)/ FM600(2-channel) is a freely programmable frequency / analog transmitters with display unit. Through its multi-function input frequency processing and the up to 2 analog outputs (current/voltage) of each channel and the assessable digital outputs, the device is ideally suited for the display of instantaneous flow with simultaneous assessable for counting pulse water meter with main and secondary points. Especially for water meters with bypass a scaled summation is integrated (only FM600). A low level suppression is shiftable. Both the instantaneous flow rates and the meter quantites are outputted added.


The main area of application is the through-flow measuring at water meters. Further applications are the measuring of rotation speed or energy consumption.


  Specific characteristics

  • 1 (FM300) or 2 (FM600) channels in just one housing
  • Inputs: NAMUR, contact, open collector, 3-conductor Opto, 24V activ
  • Analog outputs: each channel 1 current and 1 voltage (synchronous)
  • Digital outputs: relay respectively optocouple (puls function or limit contact)
  • Scaled summation
  • Shiftable low level suppression
  • Programming directly on the device or via a free programming software
  • DIN rail or panel mounting
  •   Business data

    Order number
    AD-FM 300 FE 1-channel; front mounting
    AD-FM 300 GA 1-channel; DIN rail mounting
    AD-FM 600 FE 2-channel; front mounting
    AD-FM 600 GA 2-channel; DIN rail mounting



      Technical specifications

    Digital inputs
    Input NAMUR (EN 60947-5-6), reed contact, open-collector, 3-lead opto-transmitter or 24V active
    Input frequency min. 0 ... 1 mHz; max. 0 ... 10 kHz
    Frequency generator supply active: max. 13,5V (max. 20mA); NAMUR:8V/8mA
    Contact debouncing activatable, pulse duration > 40 ms
    Current outputs
    Output range 0 ... 20 mA; 4 ... 20 mA
    Max. burden 400 Ohm
    Residual ripple <50 µAss
    Voltage outputs
    Output range 0 ... 10 V, 2 ... 10 V
    Min. burden 10 kOhm
    Residual ripple <20 µVss
    Relay outputs
    Maximum switching load AC 250 V, 2 A
    Maximum switching load DC 50 V, 2 A
    Contact construction changeover contact
    Switching operations mechanical 10000000
    at 230V/2A AC, cos(phi)=1 600000
    at 230V/2A AC, cos(phi)=0,4 200000
    at 24V/1 A DC 200000
    Graphic-LCD 122x32 Pixel, background lit
    Digital display 5-digit, can be configured
    Display functions each channel input frequency, scaled instantaneous measuring value, quantity impulse, scaled dimension as quasi analogue bar, channel description and scaling unit in plain language
    Unit 0,3%
    Temperature influence <100 ppm / K
    Response time ~70 ms
    Supply voltage 20 ... 253 V DC / 50 ... 253 V AC
    Max. power consumption 4 W / 5 VA
    Housing front mounting
    Manner of fastening Panel-mount-case (DIN 43 700)
    Type of protection IP 65
    Connection method screw clamp
    Dimensions (WxHxD) 96x48x131 mm
    Front panel cut out 92x44 mm
    Switchboard thickness 1,5-10 mm
    Weight ~230 g
    DIN rail housing
    Manner of fastening DIN rail 35mm (EN 50022)
    Type of protection IP 20
    Connection method screw clamp
    Dimensions (WxHxD) 100x74x119 mm
    Weight ~230 g
    Environmental conditions
    Ambient temperature 0 ... 50 °C
    Storage and transport -10 ... 70 °C (no thawing)
    Product family standard EN 61326
    Emitted interference EN 55011, CISPR11 Cl. B
    Electrical safety requirements
    Product family standard EN 61010-1
    Overvoltage category II
    Pollution degree 2
    Galvanic isolation, test voltages
    Input/output 2 kV RMS (1 min.)
    Signal/auxiliary voltage 4 kV RMS (1 min.)
    More technical documentation
    instruction manual

      Block and wiring diagram