can atlas signals for 3 railtrack be used for 2 rail? If so,how?
Original Post
Yes. You need the 2-rail sensors. If you're using DCC or DCS, though, you need to use something like the NCE BD20 current sensors which don't tap into the feed wires.
About 2/3 down the following page you'll see the Atlas 7935 sensor and BD20:
http://www.customsignals.com/parts-pcbs.php
Hope this helps.
