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Posted By Dan Pierce on 02/07/2008 4:52 AM
A Single Pole Double throw (SPDT) momentary switch with 2 diodes is all that is needed to operate the LGB EPL drives, or Aristo units.

Link to the training dutchman's site with many good wiring diagrams.

http://www.altek.nl/graphtips/EPLsturing.gif


This is definitely the better way to do it.  It is not a "true" dc but really half-wave ac.  While true dc will drive the machines with less voltage even, if the toggle sticks, you can burn out the turnout motor.  At half-wave ac, if the toggle sticks, the motor can take it no problemo because half the time it is actually resting.

What Dan didn't mention is that you would be using an ac source through the two diodes and not dc.

This is probably about the best info on the web on these things.

http://www.trainweb.org/girr/tips/tips1/lgb_1600.html
 

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Hi, If my power supply to LGB switch machines is DC, are the diodes required?
Cheers,
Chris

Assuming you mean the LGB switch control box, it won't work. The turnouts would only throw in one direction and you would have to "hand throw" them back the other way.

But to power individual turnouts, you can use dc with the momentary dpdt switches and a "crossover pattern" on the switches wires, as noted before.
 
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