 Joined: 08/09/2015(UTC) Posts: 2,078 Location: Cowansville, QC
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Hi guys  Those who regularly read my threads know that I had a lot of problems with my rails used to detect trains by wheels on locos and wagons. With the help of Lasse (Danlake) first and Peter (PMPeter) second, I was able to solve the problems. And I thank them for that. I ground the ends of the rails (about 64-66 rails) . It took time and as usual everything worked... one day. This afternoon... again a problem three S88 diodes light up on the layout of the cs2. On the TCO these 3 blocks are declared "occupied" and no coaches or freight cars or locomotives are in the blocks. Under the table in some places the wires of the S88 are even coated with aluminium foil to avoid turbulence with the wires of the electric current So I agree with the hypothesis put forward by Peter (PMPeter) if my memories are good, I have a problem with the flat Marklin cord or with the S88 5217 decoders from viesmann or both together. I've been surfing the LDT site a little bit. A lot of choices and for a little guy like me, it's the puzzle. What to choose? What are the differences between - RM-88-N - RM-88-N-O - RM-GB-8-N The second one (RM-88-N-O) tempts me very much but I don't know LDT products To conclude, the extended connection cable for the s88-feedback bus seems better than the marklin flat cable. I need your advice, which as usual will be appreciated. I have the CS2 and the software Itrain Thank you Thewolf |
Project Estrie Rail Road-CS3-Track C- Itrain-Digital |
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Joined: 04/04/2013(UTC) Posts: 1,291 Location: Port Moody, BC
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Hi,
I generally use the RM-88-N (6 of them) and have added 2 of the RM-88-N-O with the opto-coupling in a couple of areas where I had a contact track always showing occupied and another area where I was getting consistant
CS2 crashes whenever I was going over a particular contact track under Rocrail control. Once I replaced those decoders with the RM-88-N-O units the problems disappeared. If I was starting over I would go for all RM-88-N-O types since they appear to be far better for the extra cost.
As stated previously I also have the LDT turntable decoder, and have started to standardize on the LDT signal decoders. All work exceptionally well. I had one signal decoder output fail and after communication with LDT on when and how it failed they gave me a repair quote, I sent it off, and got it back repaired at no charge. So they stand by their products.
Peter
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Joined: 08/09/2015(UTC) Posts: 2,078 Location: Cowansville, QC
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Originally Posted by: PMPeter  Hi,
I generally use the RM-88-N (6 of them) and have added 2 of the RM-88-N-O with the opto-coupling in a couple of areas where I had a contact track always showing occupied and another area where I was getting consistant
CS2 crashes whenever I was going over a particular contact track under Rocrail control. Once I replaced those decoders with the RM-88-N-O units the problems disappeared. If I was starting over I would go for all RM-88-N-O types since they appear to be far better for the extra cost.
As stated previously I also have the LDT turntable decoder, and have started to standardize on the LDT signal decoders. All work exceptionally well. I had one signal decoder output fail and after communication with LDT on when and how it failed they gave me a repair quote, I sent it off, and got it back repaired at no charge. So they stand by their products.
Peter Ok thank you ...... I see that you use both... but I still don't know the difference... I'm sorry but I don't know more... it doesn't matter... I'll send an email to LDT for more info. But for the price difference I'm probably going to opt for the RM-88-N-O Thewolf |
Project Estrie Rail Road-CS3-Track C- Itrain-Digital |
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Joined: 04/04/2013(UTC) Posts: 1,291 Location: Port Moody, BC
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Originally Posted by: Thewolf
Ok thank you ...... I see that you use both... but I still don't know the difference... I'm sorry but I don't know more... it doesn't matter... I'll send an email to LDT for more info.
But for the price difference I'm probably going to opt for the RM-88-N-O
Thewolf
The RM-88-N is the same as a Maerklin S88 decoder with the same type of connections. You connect a ground wire to the inverted T of the first module and then just the inputs to the rest of the other modules. The RM-88-N-O is optically coupled. Therefore, in simplified terms there is no electrical connection between the inputs and the output. For this reason you need to provide a digital power reference connection to each module instead of the ground connection. Any interference picked up by the input wires is not transferred to the output due to the optical coupling isolation. So you could consider that the RM-88-N is an electrically connected device and the RM-88-N-O is a "light" connected device. I'm sure electronic experts will shutter by my explanation, but it is probably the simplest way to explain the difference. So you are on the correct track. If you expect you are having interference issues the RM-88-N-O is the way to go. Peter
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 1 user liked this useful post by PMPeter
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 Joined: 30/08/2002(UTC) Posts: 1,288
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Adding to the above explanations: The RM-88-N and RM-88-N-O are connected to one of the outer rails, and react on present wheels grounding the connection. The RM-GB-8-N is connected to the inner/center rail, and reacts on a present slider/pickup-shoe consuming power. The RM-GB-8-N was a perfect solution on my M track layout. I would use it also on my C and K track layout, if the cost per input was equal to the RM-88-N-O. (No need for the ”diode trick”.) Both are great products, and I have never experienced any interference. |
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1 user liked this useful post by PeFu
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 Joined: 16/05/2011(UTC) Posts: 1,489 Location: Lyon, France
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Joined: 30/08/2002(UTC) Posts: 1,288
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Originally Posted by: French_Fabrice If using a CS2, you could use a RJ45 internet cable also here, by adding the following products from Tams: 1 x S88-15 (Short 15 cm cable) 1 x S88-A-SL (Adapter) This makes it possible to have a longer distance to the first S88 module, without interference. |
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 Joined: 25/08/2004(UTC) Posts: 332 Location: Madrid,
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Hello
Suddenly I remembered that with CS2 it was necessary to use the s88 ground connection (that connection marked as an inverted T). I can't find the marklin document where it was referenced, but I'm sure of it. It is possible that connecting only one of the s88 may be sufficient if this is not the case, you must connect each of them, i. e. a cable from the T-connection to the rail ground.
Hope this helps
Best regards and good luck |
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Joined: 08/09/2015(UTC) Posts: 2,078 Location: Cowansville, QC
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Originally Posted by: amartinezv Hello
Suddenly I remembered that with CS2 it was necessary to use the s88 ground connection (that connection marked as an inverted T). I can't find the marklin document where it was referenced, but I'm sure of it. It is possible that connecting only one of the s88 may be sufficient if this is not the case, you must connect each of them, i. e. a cable from the T-connection to the rail ground.
Hope this helps
Best regards and good luck Hi Antonio I think that only the first must be connected to the ground I thank everyone for the help you gave me. It was appreciated. I will be ordering in a few weeks the LDT products that I want right away after finally receiving the news from my native country... long awaited for too long. Thewolf |
Project Estrie Rail Road-CS3-Track C- Itrain-Digital |
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