In contrast to module A-180 each socket is equipped with a 3-position switch that allows to connect the corresponding socket to the internal bus #1 (left position), bus #2 (right position) or to turn the socket off (center position).

Examples:

- all switches in left position or all switches in right position: 8-fold multiple

- four switches in left position and four switches in right position: two 4-fold multiple

- X switches in left position, Y switches in right position and Z switches in center position: two separate multiples with some sockets turned off