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I'm looking to build a passing siding with a timed relay to stop a train entering the siding, pause it there for a 45 seconds or so, and then release it to running the rest of the siding and back onto the main track.  The siding will be hidden under a tunnel, so the effect is that the train enters the tunnel and disappears for a while.

I'd love to have the CTT Electrical Forum's members advise me on how to do this.  How exactly should I wire the sections of track?  Here's what I came up with, but am not at all sure (see attachment) that it will work as intended. I also have these specific questions:

Also, what size timed relay --  1NO 1CLSD, 2 NO/2 CLSD, # volts, can the bridge rectifier be incorporated into the relay so no extra wiring?

I'd appreciate any guidance you can provide. I searched the forum with no success, but I'm unsure of the right search terms.

Thanks in advance for any help you might be able to provide.

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  • Wiring for Stop-Start Section: Proposed wiring for stop-start section of passing siding
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Lionel made an accessory, the #115 City Station, that was a stop start station. The locomotive remained in forward mode and, while keeping the transformer power on, the train would enter a block of track with fiber pins in the middle rail at each end, and the train would stop for a minute or so, then start up again.

Here is a photo of the Lionel #115 City Station on my layout:

20221018_103143

Arnold

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  • 20221018_103143
Last edited by Arnold D. Cribari

Just to confirm, the fiber insulating pins were on the middle power rail, not either of the side rails?

Well, usually. Later prewar 115 stations, block signals, the 132 postwar version, etc. place the nichrome heater in series with the locomotive motor (and any other load in the block) to heat the bimetallic strip, which breaks the isolated middle rail. It is briefly discussed here.
However, earlier 115 prewar thermostatic switches use a directly heated bimetallic strip. This earlier style requires one "outside" rail to be insulated to act as a direct switch for the nichrome heater in the usual manner.  Its wiring is discussed here.
Note that the E-unit must be locked-out for either version.

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OGR Publishing, Inc., 1310 Eastside Centre Ct, Ste 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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