Platform Scales (2-Wire) 4-20mA Analog Output – Wiring Diagram

Diagram below illustrates wiring diagram for 3200 Series Platform Scales equipped with Loop Powered 4-20mA (2-Wire) and no display.

Platform Scales 4-20mA 2-Wire Loop Powered

To check the output:

  1. Connect the RED wire to a 24V DC outlet.
  2. Next, connect the GROUNDING WIRE (bare) to a suitable Earth Ground location in your building as this will help determine faults in the scale if any and increase stability of your readings.
  3. Then, connect the BLACK wire to the input terminal (+) of the ammeter or digital multimeter.
  4. Connect the return terminal (-) or “common” of the ammeter to ground.
  5. You will now have 4-20 mA reading from the ammeter.
  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.