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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 may significantly disrupt smooth automatic operation by delaying events.\\
+===== 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.\\
+|< >|
+|  :!: Not offered by GCA, but of course also possible //flying// without a circuit board.  |
+|< >|
+^ Here are some files to make the real PCB. ^
+|{{mgv:hardware:mgv99.pdf| The PCB}} |
+|{{mgv:hardware:mgv99sch.pdf| The schematic}} |
+===== Remarks =====
+On a german __**[[https://sites.google.com/view/rainerk/home/hinweise-zu-stromdetektoren|Homepage]]**__ there more useful recommendations.\\