These Chassis controls up to twelve 8×1 or 4×2 modules, and can hold up to six 8K modules. One CP8 relay driver / display module is needed per switch module and these give you LED indication of switch status on the front panel. Add Switch Modules to complete the system.

Dimensions:
19″ Rack Mount (483 mm)
15″ deep (381 mm)
7.0″ (4 RU) high (90 mm)
Weight: 20 to 31 lbs (9 to 14 Kg) max
AC Power : 125 Watts max. 110/220 selectable.

link to switch module selector