Dennis LaGrua posted:rtr12 posted:I think some of this info is hard to come by, so when in doubt I use a relay. You can get 10 amp relays inexpensively on ebay in several different coil voltages, however most are DC. There are others available elsewhere for AC at a higher cost.
I have used small 12 VDC SPDT 5a relays in the past (with a rectifier) for block signal control but they require an insulated outer rail section of maybe 8" for the activation. The relay method works great but when you have a number of crossing signals and block signals on the same loop, you end up breaking the outer rail continuity in too many spots. Don't think that's a good idea.
Since no one seems to know the maximum current rating that these activation controllers can trigger, I'll take a guess that its around 1 amp because they can trigger signals that contain a sound board, lights and a speaker. I don't want to use them on the larger P/W solenoid operated stuff (like the gateman and the switching tower) as they make smoke the units, but for all new stuff they should be safe..
I meant to use the ITAD to activate the higher current relay, not an isolated rail relay. I see Stan has once again come through and uncovered all the info on ITADs so the extra relay may no longer be needed. I am always amazed by the knowledge, help and information he and GRJ provide around here (as well as some of the others here too).
