O Gauge Crossover protection: J&C Studios O Gauge Archive

Crossover protection

Dale H
Joined: Sep 25, 2010
Topics: 32 Replies: 39 Topics: 32

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posted Nov 17, 2010:

This circuit uses 2 DPDT relays. Coil activation is by the insulated rail method. Although mostly done in conventional I have made circuits that worked for 2 trolleys using DCS. The relays are wired so that each relay cuts power to the opposing track isolated center rail using 1 set of contacts per relay. A second set is used so that both relays can not energize at once. Each coil is in series to the opposing relay's NC contacts. Not shown in drawing but a 3rd set of contacts can be used so pickup rollers do not bridge the center rail. This would involve making another insulated center rail behind the first insulated center rail. This would require 2, 3PDT relays. The capacitors on the coils eliminate chatter and the different value capacitors provide a tie breaker if the trains reach the crossing at exactly the same time. The cost to make this circuit would cost about $20 for parts. Please see my relay post for relay configuration details and explanation of activating relays with the outside insulated rail method..

Larger photos of this is here, copy and paste link

http://www.modeltrainjournal.com/phpBB3/viewtopic.php?f=2&t=15603&p=273588#p273588

Dale H

nvocc5
Joined: Jul 8, 2014
Topics: 0 Replies: 6 Topics: 0

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posted Jan 13, 2015:

Hi Dale H

I believe I have all the parts for the cross over protection. This is the next project on my honey do list. I would like a printable copy of your plan please.

Kris

Dale H
Joined: Sep 25, 2010
Topics: 32 Replies: 39 Topics: 32

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posted Jan 13, 2015:

Dale H
Joined: Sep 25, 2010
Topics: 32 Replies: 39 Topics: 32

My Archive Category |

posted Jan 13, 2015:

Hello Kris

It was a little easier answering you on the below link. I can make the print larger. Copy and paste this address and it should go there. This JC sight does not seem to allow direct links. Feel free to Email me also.

http://www.modeltrainjournal.com/phpBB3/viewtopic.php?f=2&t=15603&p=273588#p273588

Dale

nvocc5
Joined: Jul 8, 2014
Topics: 0 Replies: 6 Topics: 0

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posted Jan 13, 2015:

Hi Dale

Thank you so much, I got the larger copy and was able to print it.

Kris

JohnBoy
Joined: May 14, 2008
Topics: 110 Replies: 517 Topics: 110

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posted Jan 30, 2015:

Thanks Dale!

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