Originally Posted by DonR
With apologies to the OP for hijacking his
thread, another question:
Are you saying the momentary push super buttons
have a light indicating Straight or Divert? How
does it stay on?
The 751D, Is a toggle switch available for twin coil or Tortoise
type motors. For twin coil it has connections for
panel lights and has it's own cap discharge unit.
I checked one out today. It is just a really small, normally open, push button; with a light inside the button. There are three wires coming from it. One is common to both the button, and the lamp. The second is power input for the lamp (9-12v probably incandescent). The third is the open contact of the push button. When you apply power to the lamp, and common, wires, the top of the button lights up. The buttons have replaceable, different colored, top lenses. When the button is pushed, the common and open button contact wires connect. There is no internal latch circuitry. If you want the light to stay on, that would have to depend on contacts in the switch machine. Like any other push button setup, you would need two buttons per turnout.One for main route, and one for the diverging route.
In short, it's just a push button with an internal light.