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Reply to "How to make a trolley stop on its own with k line streets"

Place the 153IR at least 1 Trolley car length before the Insulated Section.  Use the "NC" output of the 153IR to power the Insulated Section.  Set the 153IR delay to, say, 10 seconds.  Here's the sequence.

Trolley triggers 153IR.  NC output immediately removes power to Insulated Section.  Trolley has not even reached the Insulated Section yet so it keeps going.

Trolley clears 153IR sensor which starts the 153IR delay timer.  Insulated Section still unpowered since in the 10 sec Delay.

Trolley reaches Insulated Section and stops because it is unpowered.  After the 153IR delay ends, the Insulated Section again receives power from the 153IR NC output.  Trolley starts and continues onward. 

If it takes, say, 3 seconds for the Trolley to reach the Insulated Section after clearing the 153IR, then the station stop time will be 7 seconds (10 sec delay minus 3 sec transit time).

Notes:

The stopping only occurs in one-direction.  If the Trolley goes in the other direction, the 153IR gets triggered AFTER the Trolley passes the Insulated Section so the de-energizing has no effect. 

To stop in either direction, a 153IR could be placed at least 1 Trolley car length on each side of the station and the two 153IR "NC" outputs could be daisy-chained.  That way, either can de-energize the Insulated Section. 

Or bi-directional operation could be two Insulated Sections positioned on either side of one 153IR.  The 153IR "NC" output controls power to both Insulated Sections.  A Trolley would stop at one Insulated Section when going in one direction, and stop at the other Insulated Section going in the other direction.  Perhaps not prototypical but could be tradeoff depending on the relative cost of a 2nd 153IR vs. a 2nd Insulated section.

 

 

 

 

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