I have some live frog crossings set up so that the adjacent live frog points provide the power routing. On DCC this means that attempting to traverse the crossing with those points set the wrong way results in a short. I have decided to change the wiring to use a reversing unit to power the crossing frogs.
Wiring live frog crossings
2
A question was posed as an aside in another topic "How do you wire a crossing". Since I do not believe that there is anything special required to wire a dead frog crossing, I have taken the request to refer to "live" frog crossings which do indeed need some care.
To answer the question, I have prepared this diagram in "Paint" to illustrate the following cases along the top row of diagrams:-
1) The four separate sections which make up a Peco code 75 crossing (left)
2) How the sections are wired for trains traveling from left to right (centre)
3) How the sections are wired for trains traveling from right to left (right)
The bottom row of images shows a crossing where entry to the "crossing route" is controlled by a pair of live frog points. In this case, the current to the crossing frogs can be switched by the point switch which is controlling the current to the point frog. In other words you don't have to buy any extra switches.
The three diagrams in the bottom row are as follows:
1) The sections which need to be powered
2) The sections set up for crossing - the train follows the black line (it's not 3 rail
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3) The sections set up for through running
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I do hope I haven't made any mistakes.
David
To answer the question, I have prepared this diagram in "Paint" to illustrate the following cases along the top row of diagrams:-
1) The four separate sections which make up a Peco code 75 crossing (left)
2) How the sections are wired for trains traveling from left to right (centre)
3) How the sections are wired for trains traveling from right to left (right)
The bottom row of images shows a crossing where entry to the "crossing route" is controlled by a pair of live frog points. In this case, the current to the crossing frogs can be switched by the point switch which is controlling the current to the point frog. In other words you don't have to buy any extra switches.
The three diagrams in the bottom row are as follows:
1) The sections which need to be powered
2) The sections set up for crossing - the train follows the black line (it's not 3 rail
3) The sections set up for through running
I do hope I haven't made any mistakes.
David
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