Manual control of Atlas O 3 rail signal

If you provide power to the board it's just a matter of grounding the 'INs'.

DIN is detector in, usually an insulated rail. When grounded it will set the signal to stop. When ungrounded, you will get the approach to proceed sequence. The approach timeout is a few seconds before going to stop.

RIN is the 'red' input. Connected to ground this will set the signal to stop. When ungrounded, it will go back to proceed without the sequence. This is useful for protection against trailing point turnout set to foul.

YIN is the 'yellow' input, when connected to ground, the signal will not show a higher speed indication/aspect than approach. DIN and RIN override it to stop.

TLDR, just connect a switch from DIN to ground.

Thank you Norm for the information, that's really helpful, you made it sound pretty straight forward and its nice to know I can still use the control boards that came with the signals. 

Just as a matter of interest I'm not familiar with the term TLDR - is that to do with the type of switch I need to get ?

Sorry, TLDR (or TL;DR) was shorthand for the summary or the 'too long didn't read' version.  If you just want to connect a switch to the DIN wired to ground  that's the quickest way. I thought I'd share some thoughts on the other inputs that aren't utilized as often.

@Norm Charbonneau posted:

Sorry, TLDR (or TL;DR) was shorthand for the summary or the 'too long didn't read' version.  If you just want to connect a switch to the DIN wired to ground  that's the quickest way. I thought I'd share some thoughts on the other inputs that aren't utilized as often.

Hey Norm,

Additionally the new signal boards have FYin and FGin (the F meaning flashing).  The older signals mentioned above would need a six wire to eight wire plug to take advantage of these features.

Flashing yellow on a single target is advanced approach and flashing green on a single target is track speed.  The flashing green is often used in the northeast corridor traffic.

Lou N