I decided to 'bench test' connecting the dwarf signals I have to the Atlas O switch machine / 200 snap relay. Below is what I came up with.
1. the 'China Dwarf' has a built in electronic relay so is not compatible with the Atlas O switch machine. It did work with the Ross DZ-1000 switch machine.
2. Connecting the 200 snap relay to the switch machine is straight forward. Yellow wires go together and to the toggle switch, Green wires go together and to the toggle switch and in my case the middle wires go to power. Ground is connected through the toggle switch.
3. I tested the Atlas switch machine / snap relay with the DZ-1011R dwarf. The circuit diagram below worked.
4. I tested the Atlas switch machine / snap relay with the MTH dwarf signal. The circuit diagram below worked.
You can see the 1011R and MTH dwarf are way different from each other. I don't have any
Atlas O dwarf or Lionel dwarf signals so can't test those. I forgot to test the MTH dwarf with the DZ-1000/1008 cicuit when I had that circuit set up but will do so down the line. Z-stuff has supplied a circuit diagram on their web site. They have the 1008 blue wire connected to power. I assume it is implied the 1000/1008 yellow, green and red are connected in the usual manner but nothing is said about the 1008 black wire. I am assuming for now it goes to ground.
I have had the MTH dwarf signal operating for about two hours now and so far the house has not burned down.
