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Insulated Rail Relay Based Sensor

Here's a little board I am thinking of releasing, it's a fairly simple relay based signal driver for insulated rails.  This gives you a reliable method of using the insulated rail to trigger a variety of signals and eliminates any chatter due to poor contact as the train enters and exits the zone.  This comes up repeatedly, I figured maybe there's room for a cheap solution.  It adds a choke for DCS compatibility, and the power draw is only around 20ma from the track.  The resistor offers inrush protection so that you don't get arcing and electrical noise when charging the capacitor.  The board footprint is less than 1" x 2" and it has mounting holes to attach it under the benchwork.  It also has two sets of SPDT contacts for maximum flexibility for signals, etc.

Track Presence Sensor Schematic

Track Presence Sensor 3D View

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Images (2)
  • Track Presence Sensor Schematic
  • Track Presence Sensor 3D View
Last edited by gunrunnerjohn
Original Post

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

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