Re: Resistor for block detection, best size?
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Dennis ? I use iTrain with DR5088RC and get solid Railcom detection without any of the shunting which you describe and I use 1k5, or 2k resistors as axle detection for wagons. I have shown a few people this method with DR5088RC and axle detection. This has worked for all of them. ? Could you do a diagram of you shunt picture as I cannot see what is being wired to where, but the boards you are using seem familiar. IIRC someone created them for the DR4088LN-CS shunts but I can’t recall the name ? ? Perhaps when I see what you have wired it may be obvious but presently I am not aware of a DR5088RC detection problem that needs solving? ? Iain ?
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From: [email protected] <[email protected]> On Behalf Of Dennis Cherry via groups.io
Sent: 02 January 2025 22:07
To: [email protected]
Subject: 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. I do use Railcom on my railroad using JMRI. Karst replied back to me and liked my novel way to fix the DR5088RC detection. What I did was on all the DR5088RC "J" inputs was adding a resistor shunt to the 'K' connections. 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. The chart includes using 4 each 10K resistor wheels and also tested with 3 each 10K resistors wheels to simulate having dirty wheels. I would recommend the 2.2K or 2.7K 1/4W resistors for N & HO. It only takes .008888 ma? per resistor. Dennis Cherry
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