 Joined: 27/07/2010(UTC) Posts: 32 Location: Athens - Greece
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Do you know what kind of signal, is the short circuit report, that accept a central unit from a booster ?
Thank you!
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Joined: 16/02/2004(UTC)
Posts: 15,441
Location: DE-NW
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Märklin boosters set the short circuit line to positive in the case of a short circuit. I don't know which voltage will be used. |
Regards Tom --- "In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS  |
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 Joined: 23/02/2005(UTC) Posts: 800
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Hi, After the 6015 booster schematic, it's a +5V See Here (X1-5 output) Fred
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Joined: 27/07/2010(UTC) Posts: 32 Location: Athens - Greece
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Thank you for your answers. I have seen the same part of the "Short Circuit Message" also here http://www.stayathome.ch/booster_en.htm , but i don't know how exactly works. Can you explain me ? Thank you.
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Joined: 16/02/2004(UTC)
Posts: 15,441
Location: DE-NW
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Originally Posted by: billys7  but i don't know how exactly works. If one booster is on overload or detects a short circuit, it gives a positive voltage to the short circuit feedback line - and the CU will then turn the track current off as if the CU detected the short circuit itself. |
Regards Tom --- "In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS |
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Joined: 27/07/2010(UTC) Posts: 32 Location: Athens - Greece
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Ok. I understand that, but i can't understand it on the schematic.
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Joined: 23/02/2005(UTC) Posts: 800
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There are several ways, more or less sophisticated, for detecting a "short" on the track, and nearly every booster has its own. Below a short explanation: Refering to the 6015, you will see that if the booster output exhibits large enough negative waves (-16 to-24V is the normal value), the voltage at the "D3-R5-R6-C4" rectifier-filter will be low enough to get 0V at the op amp output, hence to X1-5 (short circuit report line) . Otherwise (= short or low voltage on the track), op amp output will be 5V, as well as X1-5.
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 2 users liked this useful post by efel
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Joined: 27/07/2010(UTC) Posts: 32 Location: Athens - Greece
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Thank you very much for the explanation.
Vasilis
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