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Wiring Mini Volt/Amp meter into Drivers Station

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  • Wiring Mini Volt/Amp meter into Drivers Station

    I currently have Panel Volt meters wired at Drivers Stations, one stopped working and thought about replacing it (All actually) with Volt/Amp meters. Having a problem understanding wiring configuration required. New meters have 5 wires vice old volt meters using 3. Under old circuit I used Controller posts for points of measuring - Black wire to Red post, Red wire to White post and Yellow wire to Black post. This displays TRACK voltage (0.0 until controller depressed then goes up according). I've tried several configurations on new meters without success. I think problem could be a result of sampling point (Controller posts). Any suggestions. VoltAmpMeter.png

  • #2
    What's the schematic look like of your Driver Station and power supply? Analog or Digital?


    • #3
      Analog 4 lane, Positive Polarity. wiring.png


      • #4
        Please review my drawing for accuracy.
        A voltmeter is typically wired in parallel to the + and - power supply.
        An ampmeter is wired in series.

        The spec on the meter is 10A. This means the cars are limited to 10A per lane since the current draw is limited to the rating of the meter.

        The pictured larger red/black harness is the ampmeter connections. This is pictured with the larger wires to meet the 10A current rating.
        The pictured smaller red/yellow/black harness is the voltmeter. the black wire is not used.

        only lane 1 is shown. Repeat for 2-4.

        wiring edit.png



        • #5
          If done as in post #4, you’ll only get a voltage reading when the controller is actuated.
          I would move the meter input leads (red and yellow) to red controller connection.


          • #6
            Thank you all for responding. Been out of town so could not implement sooner. Tried both methods without joy, seems I'm still not grasping which "Power" or "Load" circuits are to be used. ("move the meter input leads (red and yellow) to red controller connection") does that mean Red controller Post? Things appear logical as drawn but when wired, Meter display seems correct but power is applied to track regardless of controller action.


            • #7
              Just for grins, hook the new one up just like the old one. Then take the red and black lead (from the three lead connector) and hook to + and - on your power supply.


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