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Offline Profpetrof  
#1 Posted : 15 April 2015 13:14:20(UTC)
Profpetrof

South Africa   
Joined: 07/04/2015(UTC)
Posts: 13
Location: Cape Town, Western Cape
Hi All,

Hope there is someone with an answer.

I have several C-Track turnouts with the standard Marklin Turnout Motor.

The Marklin Catalogue mentions that these are double solenoid with end shut off contacts.

I am designing an automation system that will use relays to control the turnouts, problem is the relays will not have momentary power, but continuous power supply.

Is it safe to leave power connected to the solenoid?

As an addition, I see the standard white plastic control box is a momentary contact type, but I suspect that this is to make it backward compatible with the old M-Track turnout motors that did not have end shutoff contacts.

Any info will be appreciated.

Kind Regards,
Andries


Offline waorb  
#2 Posted : 15 April 2015 14:45:08(UTC)
waorb

Brazil   
Joined: 31/05/2011(UTC)
Posts: 868
Location: Brazil
Originally Posted by: Profpetrof Go to Quoted Post
Is it safe to leave power connected to the solenoid?

Hello Andries!

AFAIK (or understood), the solenoids could be energized, but not activated... You could burn them if you leave always activated.

Quote:
As an addition, I see the standard white plastic control box is a momentary contact type, but I suspect that this is to make it backward compatible with the old M-Track turnout motors that did not have end shutoff contacts.

Actually that white connectors is to give feedback to the boxes if the turnouts are set to curved or straight.
In my opinion, a deprecated system if you have a Central Station.

Cheers,

Walter
Offline H0  
#3 Posted : 15 April 2015 15:22:32(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 15,276
Location: DE-NW
Hi!
Originally Posted by: Profpetrof Go to Quoted Post
Is it safe to leave power connected to the solenoid?
Märklin FAQ 404 gives you the answer: No!
Only use pulses, do not use permanent current.

Quote:
Geschaltet werden dürfen die Weichenantriebe
74490, 74491 und 74492 für das
C-Gleis sowie 7549 und 75491 für das
K-Gleis trotz eingebauter Endabschalter
immer nur mit Impuls- und nie mit Dauerströmen.

Link to FAQ:
http://www.maerklin.de/m...faq/technik-tipp-404.pdf

“A customer can have Märklin FAQ in any language he wants as long as it’s German.”


Originally Posted by: Profpetrof Go to Quoted Post
As an addition, I see the standard white plastic control box is a momentary contact type, but I suspect that this is to make it backward compatible with the old M-Track turnout motors that did not have end shutoff contacts.
No. There are white boxes without LEDs for M track and white boxes with LEDs for C track and K track.
LEDs will work correctly only if the turnouts have the shut-off switches. With M track both LEDs will be on all the time.

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
UserPostedImage
Offline Profpetrof  
#4 Posted : 17 April 2015 10:52:12(UTC)
Profpetrof

South Africa   
Joined: 07/04/2015(UTC)
Posts: 13
Location: Cape Town, Western Cape
Thank you guys.

I unfortunately do not have a CS, and cannot get myself to invest that sort of capital at this stage.

So what I have done is ordered two Marklin M84 decoders, and some contact tracks. This should allow me to do some basic state automation.

I just wish there was a similar M83 with inputs, so that I can change switch directions as per the old signal manual. But seems this is not possible without a CS unit.

So I will have to resort to building one myself, probably using an Arduino.

Thank you all for the help.
Offline Tower  
#5 Posted : 31 May 2015 08:04:21(UTC)
Tower


Joined: 12/02/2010(UTC)
Posts: 169
Location: Pretoria, South Africa
Hi Profpetrof,

I had an interesting conversation this week about exactly this topic.

Using an Arduino and cheap Servo motors to control your turnouts the possibilities are endless.

Remember K83 = momentary power for example turnouts and K84 = permanent power

I find Contact tracks to be problematic. I use small reed switches under the track bed mounted off-center triggered by a magnet under the first wagon behind my loco. The off-center position allows for directional control as well as making different trains activating different functions.

thanks 1 user liked this useful post by Tower
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