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Because some operating cars work with the uncouple button(using car chassis for ground/common) and some with the unload button(isolated from the car chassis), a DPDT (on)-off-(on) switch can be used to replace the bulky controllers. 6019 illustrated, RCS/UCS, GarGraves/Ross, RealTrax, FasTrack similar. If you really don't want the magnet energizing, just don't connect it or cut the connection.

RCS UCS 6019

DPDT detail connections... three terminals on the left, three on the right, toggle/slide up & down, as viewed from the bottom. Sorry the numbers aren't big enough, click on the diagram for a bigger view.

SW Mod

DPDT

 

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  • RCS UCS 6019
Last edited by ADCX Rob
Dan Padova posted:

Thanks.  So basically a DPDT momentary pushbutton switch will do the trick ?

You could use two of these, or two DPST, one for the uncouple function(two hot rails) & one for the unload function(one hot rail / one ground rail) which basically duplicates the original controller. Pushing both buttons at once will, like the original controller, cause a short circuit.

If you use one switch, then you need a DPDT (on)-off-(on) switch -  which is a momentary, center off. This precludes the use of a button, so a toggle or slide is what you want to look for. Here is one example from All Electronics. Since both positions can't be used at the same time, a short can't happen.

ADCX Rob posted:
Dan Padova posted:

Thanks.  So basically a DPDT momentary pushbutton switch will do the trick ?

You could use two of these, or two DPST, one for the uncouple function(two hot rails) & one for the unload function(one hot rail / one ground rail) which basically duplicates the original controller. Pushing both buttons at once will, like the original controller, cause a short circuit.

If you use one switch, then you need a DPDT (on)-off-(on) switch -  which is a momentary, center off. This precludes the use of a button, so a toggle or slide is what you want to look for. Here is one example from All Electronics. Since both positions can't be used at the same time, a short can't happen.

Thanks Rob.  I happen to have a bunch of those.

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