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Atlas Switch Controls
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<p>The type of switch used for controling turnouts and snap relays is a Momentary Contact Single Pole Double Throw (SPDT), which means that there is only one set of contacts and two sets of positions. The way a switch controler works is that you have your 3 contacts, usually wired with Red, Yellow, and Green wires, with Yellow in the center. Now, AC power is used coming into the controler, and is routed with one side of the AC being constant in the center position, going out to the Yellow wire, and the other side of the AC going out to the Red and Green wires by selecting the side that it is on and activating the momentary contact switch. </p><p>If you don't want to use the controller that Atlas uses, one way to wire your switch machines is to send one side of your AC current directly to the center of the switch machine, and split the other side of the AC current and use push buttons to activate the switch machine. Here is a simple diagram of what I mean. I hope this helps.</p><p>--- is Red/Green Wire<br />== is Yellow Wire<br />O is Push Button<br />o is Switch Machine Terminal/AC Power pack Terminal</p><p> /-----------O-----------------o Left <br />From AC on Power Pack: o---------< (wires split at this point)<br /> \-----------O----------------o Right <br /> o==================o Center Contact</p><p>I hope this isn't too confusing and answers your question.</p>
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