dose anybody know the correct way how to hook up # 74920 railroad grade crossing unit, to the Cs2 or transformer to make it work? anybody have any pictures to send showing this 2nd question how about the uncoupler track section, that uncouples the trains how dose this get hooked up?.

I too am struggling to get my 74920 work. I have hooked up the yellow cable of the railroad Xing to a separate second trafo but this trafo also powers the signal and the tuner switch lamps. The brown of this trafo is connected to the return wire of these lamps and signals. I have not connected the brown wire of the the second trafo to the track.

The mobile station is connected to its own trafo.
Where am I going wrong? BTW, I have presently connected only one side of the X-ing as it is for trial purpose.

Thanks Renato, Your advice worked but still not fully. When the train passes the xing the red lights of the x-ing light up but the barrier does not come down. I am missing something still.

Thanks again Renato, I connected both sides of the crossing and now the the barrier as well as the light function on this side but only the lights on the first side. I think the solenoid of the first side is not working. Is it possible to get a replacement of this part?

If the crossing has the 2nd rail line extension (or without)There is a distinct possibility that the clips the connect the bits together are part of the circuit. Make sure that that war making good connection or even solder some wire to both pieces. I had this problem. One side worked the other did not.

ALso if hte barrier does not come down usually indicates not enough electrical power.

N

Symeon,

You actually must connect the 74920 to a separate transformer on a digital layout, not the trafo supplying your 6021 or CS, but it can be the same one that supplies current to lights and turntable (mine is connected that way too) and Viessmann is just the same as M* so no problem there.

It doesn't matter if the crossing is in a segment of the layout powered from a booster or from the 6021 as the track current has nothing to do with the crossing at all. If there are track feeder wires in the contact track section of the crossing (the stretch between the little blue arrows) they must be connected to the same supply as the layout segment where the crossing is located. In other words if the track either side of the crossing is supplied by the booster and you put feeder wires in the crossing section, then they must also be connected to the booster.

Your booster and 6021 must NEVER have their red wires connected together in any way. From your explanation I think this is what you have done wrong - segments supplied by 6021 must be isolated from segments supplied by booster. Note that you can connect the grounds (brown wires) together without a problem.

It sounds to me like the rest of your setup is similar to mine - 3 trafos, 1 supplying booster, 1 supplying CS (or 6021), and 1 supplying lights and accessories - my crossing is supplied by the 3rd trafo and the whole crossing (from blue arrow to blue arrow) sits within one layout segment (no insulators and no feeder wires anywhere in-between) and that segment is supplied track current from the booster. My whole layout does share a common ground though - I only isolate the centre rails so the 6021 (or CS) and booster grounds are connected via the outer rails of the tracks and my accessories share ground with that too via things like my crossing.

Hope this helps...

Martin