Question "Rail Logic" ABS signal logic boards for Model RR

Discussion in 'Layout Electronics' started by gjslsffan, Aug 14, 2012.

  1. gjslsffan

    gjslsffan Staff Member Staff Member

    These brand name "Rail-Logic" boards are earlier ones that used pre-surface mounted components. They are ABS type logic boards, and have 560 ohm resisitors soldiered to the G Y R aspect connections, so I am guessing they are LED ready. I was given enough of these boards to do 10 blocks. You can according to the little book I was given, able to be daisy chained these together, to make a block signal system(s).
    Has anyone here used these type of Logic Boards? Any ideas or suggestions as to where I can find info on same? I have Googled it and had rather limited success.
    Thanks for the help.
    Tom Holley
     
  2. FriscoFriend

    FriscoFriend Passed Away April 12, 2018 Frisco.org Supporter

    Tom:

    Are you meaning "Rail-Logic" or "Logic-Rail"?
     
  3. gjslsffan

    gjslsffan Staff Member Staff Member

    Hi Bob
    I mean Rail-Logic I have seen the Logic-Rail stuff on ebay and the like but these are older boards that have Rail-Logic screened on the boards with a set of tracks between Rail and Logic. I am at the away from home terminal right now "Provo UT" as soon as I get home I will take a picture and post, that might help.
    Thanks
    Tom Holley
     
    Last edited by a moderator: Aug 14, 2012
  4. gjslsffan

    gjslsffan Staff Member Staff Member

    Here we go, a pic for this Signal logic board. Anyone here, ever had any experiences with these? Opinions? Suggestions.
    Every well "aspect" of signaling can be expensive, and I dont want to throw good $$ after bad here.
    Tom Holley
     

    Attached Files:

  5. klrwhizkid

    klrwhizkid Administrator Staff Member Administrator Frisco.org Supporter

    Tom,
    The two SP leads on the board must be Signal Power in for the signal system; the P lead would be incoming +DC from the railroad transformer; the T lead would go to the positive rail on the track; the C terminal is a common signal ground; and the rest are source/sink for the three color aspects with a common for the signals.

    Ignoring the wires above the surface of the board (which seem to be incorrectly wired to the R terminals), the two burnt resistors in the lower left, and the transistor second from the bottom on the left that appears to have been exposed to too much current and exploded:

    The appearance is that the R terminals are grounds for Red Signals whose anode would be connected to +B.

    If there is current flowing from terminal P to terminal T, the block is occupied, so terminals R, GO and YO terminals are inter-connected and go to ground (LOW).

    If there is no current flowing from terminal P to terminal T, the block is not occupied, so terminals R, GO and YO go logical HIGH.

    The G and GI terminals on each side make up a switching circuit for each signal with the G terminals being the positive side of the transistor outputs for each and the GI being the negative side; current must flow from G to GI

    Terminals YO are outputs to carry to adjacent block boards. One to the left and one to the right. They connect to the YI terminals of the adjacent blocks.


    This board would control the signals at entering each end of a block and relay through the YO terminals the approach occupancy logic for its block to the appropriate signals for the adjacent blocks.

    These signal boards will not work for a DCC system, but would work on a DC system (provided they aren't damaged).
     

    Attached Files:

    Last edited by a moderator: Aug 16, 2012
  6. gjslsffan

    gjslsffan Staff Member Staff Member

    Keith,
    Sure wish you had taken you vacation here this year:D:D
    I am looking at this board, and I cannot believe you can see more, than I can see, while holding his thing in my own hands.
    You are scaring me a little here Brother:D
    Tom Holley
     
  7. klrwhizkid

    klrwhizkid Administrator Staff Member Administrator Frisco.org Supporter

    I'll have a diagram for you soon.
     
  8. gjslsffan

    gjslsffan Staff Member Staff Member

    Thanks Keith, Think I will try and find these parts somewhere. Resistors wont be a problem but the other components might.
    I contacted "Logic Rail" and they told me Rail Logic was made by Henning Scale Models and may have went out of business years ago, and these were likely late 80-early 90's stuff.
    Does the numbers on the components mean anything?
    Thanks
    Tom Holley
     
    Last edited by a moderator: Aug 16, 2012
  9. klrwhizkid

    klrwhizkid Administrator Staff Member Administrator Frisco.org Supporter

    Anything that would be on the face of the transistors would be good. I do have quite a few that will probably work - I also have the technical cross-reference data.
     

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