Blackmagic Universal Videohub 450W Power Card The Blackmagic Design Universal Videohub 450W Power Card allows you to add up to three external 12V power supply bricks (not included) to the Univeral Videohub router frame, as needed. Three (BMD-PSUPPLY-12V12A) 12V/150W power supplies offer enough power for 72 x 72 BNC SDI or optical fiber routing.