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Offline billys7  
#1 Posted : 20 July 2013 01:12:24(UTC)
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billys7

Greece   
Joined: 27/07/2010(UTC)
Posts: 32
Location: Athens - Greece
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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Offline H0  
#2 Posted : 20 July 2013 08:13:03(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,442
Location: DE-NW
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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Offline efel  
#3 Posted : 20 July 2013 15:09:08(UTC)
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efel

France   
Joined: 23/02/2005(UTC)
Posts: 800
Hi,
After the 6015 booster schematic, it's a +5V
See Here (X1-5 output)

Fred
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Offline billys7  
#4 Posted : 20 July 2013 17:48:34(UTC)
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billys7

Greece   
Joined: 27/07/2010(UTC)
Posts: 32
Location: Athens - Greece
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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Offline H0  
#5 Posted : 20 July 2013 19:41:14(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,442
Location: DE-NW
Originally Posted by: billys7 Go to Quoted Post
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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Offline billys7  
#6 Posted : 20 July 2013 20:42:37(UTC)
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billys7

Greece   
Joined: 27/07/2010(UTC)
Posts: 32
Location: Athens - Greece
Ok. I understand that, but i can't understand it on the schematic.
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Offline efel  
#7 Posted : 21 July 2013 13:31:05(UTC)
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efel

France   
Joined: 23/02/2005(UTC)
Posts: 800
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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thanks 2 users liked this useful post by efel
Offline billys7  
#8 Posted : 22 July 2013 15:57:00(UTC)
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billys7

Greece   
Joined: 27/07/2010(UTC)
Posts: 32
Location: Athens - Greece
Thank you very much for the explanation.

Vasilis
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