The 6 Slot NCM Rack is a pre-wired connectorized shelf designed to hold up to six Informer NCM cards. The rack is pre-wired via its connectorized printed circuit board backplane that is attached to the rack. The NCM cards plug into 56-pin connectors, which are attached to the backplane. Each rack will hold one 48V AC power supply or can be powered by an external source through terminal screw locks on the backplane.