3-Wire Cylinder Scales 4-20mA – Line Powered

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620G Cylinder Scales Line Powered (3-Wire) 4-20mA Output – Wiring Diagram

Diagram below illustrates wiring diagram for 620G Cylinder Scales equipped with Line Powered 4-20mA (3-Wire) and no display.

620G Cylinder Scales Line Powered 4-20mA 3-Wire

To check the output:

  1. Connect the RED wire to a 24V DC outlet.
  2. Connect the GROUNDING WIRE (bare) to a suitable Earth Ground location in your building. This is optional. This will help determine faults in the scale if any and increase stability of your readings.
  3. Connect the BLACK wire to a GROUND connection.
  4. You will now have 4-20 mA output coming from the GREEN wire.
  5. You will now have 4-20 mA output coming from the GREEN wire.
  6. Press the platform to see the deflection in current.
  7. Use the SPAN and ZERO potentiometers located on the side of the board to calibrate your platform current output.