Atlas o switch questions

You must momentarilly power the closure rails depending on which route is being travelled upon.

I just posted this very same suggestion to another member.

For twelve years now, I have used a two relay system (2 3-Pole Double Throw 3PDP) for each one of my switches.

The design functions without flaw and NEVER gets out of co-ordination with what is going on as far as which route is being used, as the relays take their cue from the wheels travelling over one closure rail which powers on the other closure rail.

You can use a slave relay that changes from Normal to Reverse when you remotely throw the switch, however...this is not absolute. If you throw the switch by hand or if the trains make a trailing move over the switch, not aligned for it, the slave relay will actually set up a condition which will cause a short circuit the instant the first wheelset travels over the powered on closure rail.

I can provide detail if you wish it.

Hope this helps!!

Atlas has a switch relay (6924) that would address a lot of your problems.  Call or E-mail Atlas, Steve Horvath.

Atlas 6924 Switch power Relay