Encoder A

The Encoder A serves as the link between a track diagram control board and the Selectrix system. The Encoder A is connected to the Sx Bus,
and sends a control command, entered by pressing a button on
the track diagram control
board, digitally to the appropriate Function Decoder. Up to 8 track diagram control board tiles can be connected to the Encoder A, and it can be programmed for any address from 00-104. One 66819 rectifier is required for operating 4 Encoder A units. Can be connected to the Sx Bus.

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