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My small 6x11 layout uses all fastrack. I have for now 2 135 lionel bricks running into the mth rev. L tiu fixed one and fix two ports. I also have my legacy hooked into it via the rs232 and proper mth tiu/tmcc cable. I also have the mth wifi/ wiu connected to my usb port on the tiu. My track feeders are all connected in the star pattern via mth terminal blocks. There are two.one for each side of my layout as it is divided in half. Each brick powers one half. I connected the legacy com. Wire to the banana ground or black post on the fix 1 out on my tiu. I have basically exstetion cords in connecting the terminal blocks to the tiu. I cut off the female end and use banana jacks to hook them to my tiu. The male end easily plugs in to the female end and then is run and hooked to the main post on the tiu. I make sure to color each male and female end with a sharpi so I always have hot and ground hooked the proper way each time. This allows me to have my modular sections which can easily be connected to my tiu. This set up has worked flawlessly since day one of building my layout. 

I recently got out some old realtracks I have to test out my engines going through various switch configurations. I may use it someday on the other sections of the layout. For now just laying the track out on the floor next to the layout to try my experiment is what I am doing. I basically used another exstetion cord with the male end and just put some large alligator clips on the other end to attach quickly to the track. I pluged the male end into fix out 1 on my tiu. Powered up the 135 brick for fix tui 1. Success I ran mth and legacy engines on this test track with out any problems. Thats how it should be. 

This got me to thinking. When I do add more sections and expand my layout will the legacy/tmcc comm wire connected to the fix 1 out on the tiu be sufficient for the legacy signal. I know only one command base is used on a layout. What about the com. Wire to the track though. Like track feeders does it need mutiple ground locations on the layout  to get better signal strength? Or is just the one hook up to the fix 1 channel on the output side of the tiu enough to handle it now matter how big my layout gets in the future?

Here is a photo of my tiu set up. I recently moved it and tidied up the wiring. I got tired of not being able to unhook everything easily from my tiu and get at it to do firmware updates on it. This is much easier to do now. Love those banana jacks they made my wiring job so neet and easier to unhook everything when needed. I know I need inline fuses on the output side of things to protect my tiu fuses. I just need to get around to that. 

 

 

 

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If I read your post correctly, connect the common outputs (black) of your TIU together and you should be fine with the Legacy signal connection. That is also what it looks like needs to be done from your picture.

Legacy should work as long as all of your common outputs are tied together and Legacy is tied into them. I have mine setup the exact same way, 2 loops, fxd 1 for 1 and fxd 2 for the other. I tied the common TIU outputs all together connected Legacy to the TIU as you have done. Some of the older TIUs (Rev G's I believe someone said recently) had the commons connected internally, but the Rev Ls do not.

Last edited by rtr12

Thanks , never thought about that one. Will the signal strenth be strong enough then, after tying all the tiu out grounds to gether when the track lenth gets incresed by layout exspantion? Also just a thought. would adding the tmcc/legacy signal to each isolated block (just on connection per block) be a better way to go verses placing the legacy com at the tiu. That way each block has its own signal or maybe this is not a good idea. Dont get me wrong it works fine now. Havent had any trouble on my small layout as of yet. Just wondering if and when I expaned and  it gets bigger will I run into any glitches with the signal the way you suggest I do it? How many feet of track can one have before the legacy/ tmcc signal gets weaker so to speack or does it?

I have my legacy base connected to one of my black terminal's on my 11 PDB-1's.  This is going into Fixed 1 on my TIU #2 (Super mode with #3, #4 with 5 transformers - TIU # 1 is for my programming track not normally operation).  Each TIU is connected to one of my 3 levels and my Legacy engines run well on each of my levels even with the legacy control wire being connected to just to level 1.  Level #3 does not have any track connectivity to level 1 or 2 except via the single connection to the legacy ground going through TIU #2. I do have a earth ground wire connected to my water pipe running between the homosote and the plywood for each level.

As far as I know only one connection to the common is all that is recommended for Legacy. It is a different system than DCS and works completely differently. If you have signal problems later on after expanding then the earth ground wire Winrose mentions may need to be looked into. I don't see a need to worry about it unless you have problems. 

Last edited by rtr12

When you get ready to expand and have a track plan, you might ask here again about the need for an earth ground wire. But I really think most folks just build the layout and then add that if they find they need it somewhere.

Somewhere on the Lionel website there is a video or two that covers this. They also have some on Legacy as well. I have not had much luck finding things there since they reworked their website of I would post a link or two. 

The earth ground issue resolves TMCC/Legacy issues that surface with close yard tracks or overhead tracks.  Also it varies on the type of engine with shorter engines (usually shorter engines have smaller antennas) having issues in a place where a large engine such as an  articulated might be OK.  Also Legacy (at least when it first came out - I have not tested it recently) sometimes requires the earth ground whereas a TMCC engine runs without issues.  This is because the Legacy engines require a complete data packet that is not as critical with TMCC.  Because I have mult-level layouts, I just place an earth ground wire crisscrossed between the homosote and the plywood.  It is easier to add during construction than after for me.

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