Momentary Latching Adapter

The Momentary Latching Adapter adds two momentary inputs to the operation of any Touch Toggle. The connected Touch Toggle operates normally. One momentary input sets the Toggle to red, and the other to green. The Touch Toggle changes indication just as if it had been thrown with a touch. After the momentary operation the Toggle is ready to throw back again the next time it is touched. This lets the automatic operation work without ever intruding on manual control.

The momentary input can be from our Momentary Touch Controls, a sensor, or electrical contact. The Touch Toggle indication always shows the current output whenever the Touch Toggle is touched, or the momentary inputs are triggered.

The Latching Adapter works with contacts, pushbuttons, block detectors or optical sensors. It will accept logic level pull-to-ground inputs from any electric or electronic circuit.

A simple application might be to have a single momentary control throw a series of turnouts to clear the mainline in a yard.

Another application would be to add an Emergency-Stop button for a power circuit.

With the addition of sensors you can semi-automatic control like in a reversing loop, where a train may enter a frog end of a turnout with the points thrown against the train. With this arrangement, normally a Touch Toggle controls the turnout. Sensors or block detectors can spot a train approaching a turnout from the two tracks beyond the frog, and if needed the adapter will reverse the Toggle to let the train through. (This is the same action as an “Anti-Derail” feature found in high rail systems.)


This product is complete, but waiting for labeling and packaging. It is expected to start shipping in early November, 2021. Pre-orders will be shipped in the order they are received.


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