PatriotClass Posted October 6, 2019 Share Posted October 6, 2019 Hello, I have fitted some of my locos with the Hornby 8249 Decoder and now want to upgrade them by installing a remote decoupler. This device from Märklin works fine with the LENZ standard V2 on F1 (green wire). Having connected the uncoupler to green and blue wire on the 8249, I was able to activate it on F1 key but can't cut off power, although having deactivated F1 on the control. I had to hit the emergency stop button to power down the main. After restoring power, the function out of the decoder was off. I could activate it hitting F1 but again was unable to turn it off. I changed the decoder by a new one out of the box, but the problem appeared again. Also with a LED hooked parallel to the dcoupler, the same effect. Any ideas? Link to post Share on other sites More sharing options...
smokebox Posted October 6, 2019 Share Posted October 6, 2019 (edited) How much current does the uncoupler use? The R8249 can only supply 100mA maximum on each of the function outputs. Edited October 6, 2019 by smokebox Typos Link to post Share on other sites More sharing options...
PatriotClass Posted October 6, 2019 Author Share Posted October 6, 2019 The uncoupler uses 250 mA. I thought the sum of all functional outputs should not exceed 500 mA. Then drawing to much power makes the funktion output of the decoder stall? Link to post Share on other sites More sharing options...
smokebox Posted October 6, 2019 Share Posted October 6, 2019 (edited) You can't exceed 100ma on any function output. Edited October 6, 2019 by smokebox Incorrect information deleted 1 1 Link to post Share on other sites More sharing options...
PatriotClass Posted October 7, 2019 Author Share Posted October 7, 2019 Okay, thank you Smokebox! Then I will replace the Hornby decoders by the LENZ Standard V2. Link to post Share on other sites More sharing options...
tractor_37260 Posted October 7, 2019 Share Posted October 7, 2019 1 hour ago, PatriotClass said: Okay, thank you Smokebox! Then I will replace the Hornby decoders by the LENZ Standard V2. A much better choice.............. Link to post Share on other sites More sharing options...
RAF96 Posted October 9, 2019 Share Posted October 9, 2019 1 Link to post Share on other sites More sharing options...
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