Lost signal diagram help diagram help please

[Buz]

Hi all

Unfortunately a quite a while ago I lost my useful wiring diagram note book in a roof leak.

Full of useful ccts and notes I had collected over the years.

I now need to set up a Hornby Dublo signal to stop a train but still allow it to go through the other way un-hindered on a bi-directional single line.

I can't remember exactly what was in the middle of the cct can any one fill the gap and confirm the diode will do what I want it to

Which is let the train through that would be ignoring the signal.

Which I think it should do and what voltage and value ?? the diode should be I don't want to be replacing it every five minutes and it could be subject to the full track voltage nominally 12v.

And whatever is in the middle will be subject to a Pulse from a cdu as the lever will be in the same frame as the points as it operates the same way and I don't want to replace that every five minutes either.

/media/tinymce_upload/88252f95d902bb3491e85dcb9de3c73b.jpg

regards John

[Rog RJ]

Any general purpose diode such as 1N4001 should work.

 

PS.  I have posted mainly to bump this topic up.

[Buz]

Hi Rog (RJ)

Thanks that confirms the diode will work.

Now I just need the middle part of the Cct so I can make it all work the way I want it all to work.

Its a pain trying to put a Cct together from memory, when that's what the note book was supposed to do paper memory.

At least the distant signal is a straight parallel wire to the home signal no extra switch or fancy Cct's if there is enough track length to put the distant signal in and have it look right, some how I doubt it.

But then the distant signal is only a mimic and bit of a gimmick in this instance it has no real function other than to look good and clever-clog's.

The real functionality needs to be the Home signals coupled with the track isolation.

regards John

[Buz]

Hi all

Have managed to get a little further with the diagram /media/tinymce_upload/253cb00735794e71e84cdf3730c5b871.jpg but Drawing in the latching relay properly is still a how do I.

I assume there would be a common Negative ?? Neutral?? for both the signal and relay

I know what I need its just putting it together from memory without a diagram to show how it all goes together.

regards John

[Buz]

Hi all

Thanks to a member on another forum got it.

The Cct is for a twin coil solenoid signal for a bi-directional main line so the facility for the train to run through

the front (correct railway term) unimpeded is built in with the diode.

If it doesn't work the diode is wired the wrong way round and the wire needs swapping around.

Trains stop at the back (correct railway term) of the signal when it is set to stop and proceed will allow the train go on its way.

/media/tinymce_upload/083880e7cce5ac91f3de381b5dd33d3e.jpg

This Cct applies only to twin coil solenoid signals in this instance it is a Hornby Dublo signal.

If there is a CDU in the Cct I am advised that a 24V latching relay is required.

If using other brands make sure the solenoid can handle 24V before having  a CDU in Cct

regards John