.: DCC Auto Reverse Module and Circuit Breaker
ARM-2 Description
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The Auto Reverse Module is a circuit designed to operate on model railroads running DCC. When a track is looped back to it self, the outer rail on the north side of the track will return and make contact with the south rail. This creates a short circuit. To resolve this, the rails on both ends of the loop need to be isolated so the short does not occur.
In order for a locomotive to run smoothly into the reverse loop, the polarity of the loop needs to be switched so the loop polarity matches the track where the locomotive enters the loop. It then needs to be switched again as the locomotive exits the loop. The Auto Reverse Module was designed to take care of that function automatically.
The ARM-2 circuit detects when the locomotive enters the loop and switches the output polarity almost instantaneously. This is achieved by using solid state switching so the delay to reverse the polarity is only a few milli seconds.
If after the output polarity has been switched and a short circuit condition still exists, the DCC circuit breaker feature kicks in and disconnects the output.
The output will remain disconnected for 15 seconds if the unit is in automatic mode or will remain disconnected until a reset button is pressed if the unit is in manual mode.
ARM-2 Features
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* Completely automated.
* Terminal strips for easy connections.
* Does not require any external components to operate.
* Solid state design for fast switching.
* DCC Circuit breaker mode for block protection.
* Auto or manual reset of circuit breaker function.
ARM-2 Notes
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Connections
Connections to the ARM-2 board are simple and easy to understand.
DCC in connects to the DCC bus and DCC out connects to the reversing loop, wye junction or turntable rails.
ARM-2 Board Connections
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Power
This ARM-2 board requires no external power source.
Terminal Connections
DCC IN - DCC into the board.
DCC OUT - DCC out to the loop, wye junction or turntable.
