Remote Switching Control Bus
From Computer History Wiki
The Remote Switching Control Bus was a power control bus used across many DEC product lines to allow remote control of power. It contained three lines: a ground return, a 'power on', and an 'emergency shutdown'. (Not all devices used the last.)
The bus was connected using 3-pin AMP MATE-N-LOK connectors: all units used a male shell (with female sockets); all the cables (normally 3-conductor, #22 gauge, but 2-conductor is seen) had female shells (with male pins), on both ends.
The male shell (housing) was a 1-480304-0, and took 61173-1 socket; the female shell was a 1-480305-0, and took 61174-1 or 61118-4 pins.
