The Mitsubishi Q68B-C is a module hub for the Q-series PLC rack, used to connect expansion modules to the main base unit. It is the physical interface that extends the backplane bus to additional I/O or function modules in a multi-slot configuration. Rated operating range and bus supply are covered in the Q-series system manual, but for system planning: this hub consumes backplane power from the main base or power supply module; the total expansion current draw must be within the power supply's capacity.
For procurement planning: the module is quoted to order.