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2rail-detection-en [2018/11/12 08:56] (current)
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 +======GCA99 2-Rail current detection ======
 +[[english|{{ ​ rocrail-logo-35.png}}]]
 +[[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en#​interfaces|GCA]]
 +  *  [[mgv-overview-en|The GCA Family]] | **GCA99**
  
 + \\
 +
 +===== The problem =====
 +If you are using a 2-Rail system with current detection you must make sure that all surrounding tracks have the same voltage level as the detection section.\\
 +This will trigger an event as soon as the first current drawing wheel set touches the isolated detection track.\\
 +In all other cases the event will come only after the whole locomotive is on the isolated track. This could be too late under certain conditions.\\
 +
 +
 +===== The solution =====
 +Use a dummy detection unit for all surrounding tracks:\\
 +{{mgv:​hardware:​2rail-dummy-detect.jpg}}\\
 + \\
 +Example of how to wire the tracks:\\
 +{{mgv:​hardware:​2rail-dummy-wiring.png}}\\
 +The sensor event will only occur after the locomotive is completely on the sensor track if the dummy is left out.\\
 +
 +===== The Printed circuit =====
 +
 +The previous picture , shows a rough solution to make this printed circuit.
 +
 +Here are some files to make the real PCB.
 +
 +{{mgv:​hardware:​mgv99.pdf}} ​  the PCB  ​
 +
 +{{mgv:​hardware:​mgv99sch.pdf}} ​  The schematic  ​
2rail-detection-en.txt ยท Last modified: 2018/11/12 08:56 (external edit)