That's a junction board for the analog computer Confetti. It could be controlled by on (+12V) and off (-12V) signal.
With plugging it into any Confetti output one can switch an other signal connection on and off. It's ideal use is in an analog neural network, one can turn other inter neural connection on and off.
It's functionality is like a relays but because of the build in diodes one has a voltage drop of 0.7V in controlled circuit.

confetti503_digital_junction_01.zip

The Confetti503 Digital Junction was designed by Wolfgang Spahn 2015-19.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.