Maximale Abschnittlänge mit Belegtmelder/en: Unterschied zwischen den Versionen
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Uslex (Diskussion | Beiträge) Die Seite wurde neu angelegt: „*Quelle: [https://www.freiwald.com/forum/viewtopic.php?f=5&t=16842&p=104187 Forum]“ |
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< | <span id="Maximale_Abschnittlänge"></span> | ||
== | == Maximum section length == | ||
< | <span id="Abschnitt_länger_als_7_Meter"></span> | ||
=== | === Section longer than 7 meters === | ||
Due to electrical interference, excessively long sections should not be used. Reporting sections longer than 7m are not possible (at least with Littfinski). | |||
< | <span id="Überwachte_Gleisabschnitte"></span> | ||
=== | === Monitored track sections === | ||
Quote from a message: | |||
Isolated track sections that are to be monitored | |||
from the perspective of track occupancy detectors, have inductive | |||
and capacitive components that, depending on the length | |||
of the section, cause increasing electrical | |||
background noise. | |||
From a monitored length of several meters, this leads to a continuous occupancy indication, even if | |||
no electrical load is present on this section. | |||
This applies to all track occupancy detectors, regardless of the manufacturer. The mentioned 7m is | |||
a perfectly realistic length. | |||
. | . | ||
Best regards | |||
. | . | ||
Peter Littfinski | Peter Littfinski | ||
< | <span id="Sind_alle_Hersteller_betroffen?"></span> | ||
=== | === Are all manufacturers affected? === | ||
No, that does not apply to all manufacturers. | |||
The reason for this 'self-occupancy' lies in the nature of the control signals used. Both DCC and Märklin/Motorola use a positive-width encoded voltage; whenever the polarity of the signal changes, a small charging current flows briefly into the line capacitance – this current is greater the longer the connected line. | |||
With simple occupancy detectors, the average current consumption is simply measured; therefore, an occupancy report is generated above a certain length, even without an actual consumer present. | |||
If, on the other hand, the '''occupancy detector evaluates the track signal''', synchronizes to it and 'looks away' very briefly during the polarity reversal (only a few µs), then only actual consumption is measured and influences of line or track length are eliminated. | |||
This information was published in a post in the [https://www.freiwald.com/forum/viewtopic.php?f=5&t=16842&p=104187 forum]. | |||
== Weblinks == | == Weblinks == | ||
*Quelle: [https://www.freiwald.com/forum/viewtopic.php?f=5&t=16842&p=104187 Forum] | |||
*Quelle: [https://www.freiwald.com/forum/viewtopic.php?f=5&t=16842&p=104187 Forum] | |||
Aktuelle Version vom 10. Dezember 2025, 14:08 Uhr
Maximum section length
Section longer than 7 meters
Due to electrical interference, excessively long sections should not be used. Reporting sections longer than 7m are not possible (at least with Littfinski).
Monitored track sections
Quote from a message:
Isolated track sections that are to be monitored from the perspective of track occupancy detectors, have inductive and capacitive components that, depending on the length of the section, cause increasing electrical background noise. From a monitored length of several meters, this leads to a continuous occupancy indication, even if no electrical load is present on this section. This applies to all track occupancy detectors, regardless of the manufacturer. The mentioned 7m is a perfectly realistic length. . Best regards . Peter Littfinski
Are all manufacturers affected?
No, that does not apply to all manufacturers.
The reason for this 'self-occupancy' lies in the nature of the control signals used. Both DCC and Märklin/Motorola use a positive-width encoded voltage; whenever the polarity of the signal changes, a small charging current flows briefly into the line capacitance – this current is greater the longer the connected line.
With simple occupancy detectors, the average current consumption is simply measured; therefore, an occupancy report is generated above a certain length, even without an actual consumer present.
If, on the other hand, the occupancy detector evaluates the track signal, synchronizes to it and 'looks away' very briefly during the polarity reversal (only a few µs), then only actual consumption is measured and influences of line or track length are eliminated.
This information was published in a post in the forum.
Weblinks
- Quelle: Forum
- -- UP4001 10:03, 28. Jan. 2012
- bearbeitet: Uslex (Diskussion) 14:37, 30. Mai 2022 (CEST), Uslex (Diskussion) 14:04, 10. Dez. 2025 (UTC)