Problems with 55081 Reverse Loop

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electricity_bill

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Hello
I have a garden railway which is DCC and powered by the Massoth Dimax 1200Z controller. Last year I installed a reverse loop and I used an LGB reverse loop controllers to operate it. It has worked perfectly ever since. I bought a second reverse loop controller late last year and I have just got round to using it on my second reverse loop. It is the 55081 model and I am using it in short circuit recognition mode as per Page 8 of the instructions and the jumper for short circuit activation is plugged in. However, when a locomotive enters the loop, the power supply trips out and I have to reset it. When I do, the locomotive then continues to run forward as the power to the loop has been reversed. The wiring is very simple and the loop is insulated at both ends. I have increased the trip time on the power supply to 600msecs but it still trips. Can anyone help please?
Bill
 
Think it could still be the Massoth Tripping Time. They are very sensitive so try upping the Time Gradually if it will go further.
JonD
 
Sure there was a thread on these a short time ago..
There was an error in the documentation, I believe?? - Damned if I can find the thread now. :(
 
PhilP said:
Sure there was a thread on these a short time ago..
There was an error in the documentation, I believe?? - Damned if I can find the thread now. :(
Click to expand...

This one?
http://www.gscalecentral.net/controls-signals-and-electronics/lgb-10340-automatic-shuttle-circuit-issues/msg311678/#msg311678
 
Jon
Really reluctant to increase the tripping time as the original loop works fine, the literature talks about an instantaneous reversal and the longer you leave the short on, the more potential for damage.
 
I think I have seen one of these at Adverse Camber's RR.

If I remember correctly, there was a 'double gap', i.e. a short section of track of about an inch with isolating each end, and an output to this short section from the 55081 unit.

Maybe a PM to Adverse Camber himself would help....
 
That's when the Massoth module is used in "sensor mode", Giz - it detects and switches the polarity without a short occurring as the train runs onto the little isolated pieces; however the unit can also be used in conventional short-circuit mode just like the older LGB ones, without the little sensor track pieces, and it's that mode that Bill is having problems with.

Jon.
 
Zerogee said:
That's when the Massoth module is used in "sensor mode", Giz - it detects and switches the polarity without a short occurring as the train runs onto the little isolated pieces; however the unit can also be used in conventional short-circuit mode just like the older LGB ones, without the little sensor track pieces, and it's that mode that Bill is having problems with.

Jon.
Click to expand...

Ah I see Jon, thanks for the clarification....
 
Gents
This afternoon I have swapped the units over and the problem has moved with them. The original loop now will not work and the new one will work. The new 55081 can now be heard to click rapidly when the short circuit occurs. I also now note that the original reverse loop controller is Model 55080. I think the fault is with the new 55081.
Bill
 
PhilP said:
Sure there was a thread on these a short time ago..
There was an error in the documentation, I believe?? - Damned if I can find the thread now. :(
Click to expand...

Might be this one....

http://www.gscalecentral.net/digital-(dcc)/lgb-reversing-loop-module-55081/
 
electricity_bill said:
Gents
This afternoon I have swapped the units over and the problem has moved with them. The original loop now will not work and the new one will work. The new 55081 can now be heard to click rapidly when the short circuit occurs. I also now note that the original reverse loop controller is Model 55080. I think the fault is with the new 55081.
Bill
Click to expand...

Try using the 55081 module on its own, as it's possible it may not co-exist with an older 55080 version?

If that's the case then you may have to upgrade and purchase another 55081 reversing module, although I have seen that Marklin-LGB now have an updated 55085 version....

see the linky in my previous post....
 
Found this information....

LGB 55085 MTS Reverse Loop Module NEW ITEM Scheduled Release August 2014

New reverse loop module for the new digital LGB system world. You can switch the reverse loop on your digital layout automatically and free of short circuits. You will protect your digital layout and the rolling stock in the process. One more advantage of the reverse loop module: Several reverse loops can be used simultaneously on the layout. Reverse loop modules in use up to now cause a short circuit when the train enters the reverse loop and force the polarity of the track to switch by causing a break in the voltage, example: 55080. This new MTS reverse loop module by comparison switches free of short circuits; and interruption of the voltage in the track is avoided. The overloading of the MTS central unit by the intentionally caused short circuit is thereby a thing of the past. This protects above all track components such as locomotive decoders, turnout decoders, and the electronics customarily installed in locomotives and cars.
This module is compatible with the previous components.

Notes:
Due to technical changes, the previous MTS reverse unit model (LGB 55081) is being discontinued and replaced by the new 55085 version. This new module is suitable to a limited extent for analog operation. This product is not weatherproof and must be protected from moisture. 80 x 70 x 20 mm / 3-1/8" x 2-3/4" x 3/4".
 
electricity_bill said:
Just disconnected the old unit and the problem with the new unit is still there.
Click to expand...
Looks like it could be faulty then?

Hopefully, it is still under warrenty and can be returned to where you brought it for replacement?

That is, if the 55081 is still available Bill....
 
electricity_bill said:
Replacement Reverse Loop unit arrived today from LGB. Result!!!!
Click to expand...
Champion....
 
Replacement unit received from LGB and now working well. However, my Massoth Dimax 1200Z controller is now "clicking" as the train runs through. Is this normal?
Bill
 
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