The FortiGate-7040E is a 6U 19-inch rackmount 4-slot chassis with a 80Gbps fabric and 1Gbps base backplane designed by Fortinet. The fabric backplane provides network data communication and the base backplane provides management and synch communication among the chassis slots. Power is provided to the chassis using three hot swappable 2+1 redundant 100-240 VAC, 50-60 Hz power supply units (PSUs). You can also optionally add a fourth PSU. The FortiGate-7040E can also be equipped with three or four DC PSUs allowing you to connect the chassis to -48V DC power.