Action Demultiplexer Strand
Designed specifically for the Action consoles, this new economy demultiplexer permits control of 24 analogue dimmers. A second box can be connected for control of a total of 48 dimmers. The Action demultiplexer is designed to produce the Strand standard -10V control voltage, but the unit can be converted to produce +5, +10, +12, -5 or -12 volt.
Strandbook - Portable Dimmer Racks (1989)