The Relay Multiplexer Terminal Board - Brainboxes AD-1200 H User Manual

Reference Analog Relay Mux Board
The first wire goes from (underneath side of the card ) the
square pad, pin 1, of the channel select header strip to the
square pad on the screw terminal strip.
The second wire goes from the pad next to the square pad, pin
3, of the channel select header strip to the pad next to the square
pad on the screw terminal strip.

The Relay Multiplexer Terminal Board.

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Each Relay Multiplexer board ADMUX has 16 Double
Pole Relays, switching a differential pair of input lines on to one
of the AD1200 input channels. Each board has a 4 way dip
switch allowing 15 different jumper selectable addresses for the
board, address 16 is used by the board hardware as an
unaddress, to completely degate any relays.
On board timing ensures that the previously chosen relay breaks
before the currently chosen relay makes, so maintaining complete
isolation between all the input channels.
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