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Re: Resistor for block detection, best size?


 

Seven months ago I sent an email to Karst about some testing I did on my DR5088RC unit.? Was having the problem with reliable sensor contact.
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I do use Railcom on my railroad using JMRI.
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My Railroad is N-Scale.
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Karst replied back to me and liked my novel way to fix the DR5088RC detection.
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What I did was on all the DR5088RC "J" inputs was adding a resistor shunt to the 'K' connections.
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This has stopped my senors and Railcom Reporting? from dropping out, JMRI it did not like this and would stop displaying the Railcom ID's, I would have to close and reopen JMRI.
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The chart includes using 4 each 10K resistor wheels and also tested with 3 each 10K resistors wheels to simulate having dirty wheels.
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See Attachments:
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I would recommend the 2.2K or 2.7K 1/4W resistors for N & HO. It only takes .008888 ma? per resistor.
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--
Dennis Cherry
Owner/Moderator

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