More DCC wiring… installing the Lenz feedback bus

DC or DCC, there’s no getting away from it, there’s a fair amount of wiring to do. So, on with the show, installing the feedback bus which returns information about the layout to the Lenz LZV100 Command Station.

The black 'RSPQ' plug on the back of the Lenz LZW100 has been wired with black and green wires, for the 'PQ' programming track, and yellow and green for the 'RS' feedback bus
The black ‘RSPQ’ plug on the back of the Lenz LZW100 has been wired with black and green wires, for the ‘PQ’ programming track, and yellow and green for the ‘RS’ feedback bus

For the moment the black and green programming track wires go nowhere, but the yellow and green feedback bus wires go to the terminal block on the right
For the moment the black and green programming track wires go nowhere, but the yellow and green feedback bus wires go to the terminal block on the right

From the terminal block I've doubled back with the feedback bus wires to the LDT RS-8 feedback module
From the terminal block I’ve doubled back with the feedback bus wires to the LDT RS-8 feedback module

You might notice the extra yellow and green feedback bus wires from the terminal block to the left. These are for connecting to the adjacent module of the layout. I’ve done the same from the original terminal block, to connect in the other direction.

The yellow and green feedback bus wires send back information about block occupancy from the LDT RS-8 to the Lenz LZW100 Command Station
The yellow and green feedback bus wires send back information about block occupancy from the LDT RS-8 to the Lenz LZW100 Command Station

There you go, another evening, another bit of DCC wiring done.

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3 thoughts on “More DCC wiring… installing the Lenz feedback bus

  1. I have just completed some modular baseboards for my loft layout and like you i have gone for Lenz DCC. Im about to start laying the first pieces of track and wiring for DCC. i was wondering what size wire your using and are you using the same size for all cable runs? Also why have ou not taken the track to the ends of the baseboards, im intrigued to know how you plan to connect the boards together and align the track..

    • Hi Peter,

      I’m using 24/0.2mm copper Equipment Wire from Maplin’s for the cable runs. I’m using the same wire throughout, just because I’ve got plenty of it. On the previous version of the layout (Mk IV) I used 24/0.2mm for the main bus and 16/0.2mm for the dropper wires. As for not taking the track to the ends, my intention is build and attach the adjacent modules, lay the track across the join then cut them. I’m making it up as I go along a bit, but I’m hoping this will be good enough to maintain alignment. The modules will be secured with M8 bolts and the intention is that they will stay like that unless I have to move the layout from the loft.

      Regards,
      Ian

  2. Thanks for the info on the wire, i meant to ask if it was from maplins. Our local maplins only seems to stock red n black in the larger size. Suppose they might order in other callers!

    On the track joining subject, i just assumed you were going to leave the adjacent module short in the same way and had a cunning plan to bring the gap! Sounds like ur doing the same as me then, laying the track across the join then cutting the track once in situ, in line with the baseboard joint?

    I like you have gone with the idea of making it relocatable should the need arise!

    I just test fitted a module only to find it was a bit snug getting it between the trusses, im going to have to make the back scenes detachable to allow for this! Thats wat happens whn we make it up on the fly i suppose 🙂

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