Sirius 850 Single Frame - 576x576 Expandable (34RU). Dual Redundant PSUs. Two PSU chassis with 2.5m d.c. cables (additional 4RU), Dual Nucleus2 Controller & Control Interface card, No Monitoring or Multiviewer Outputs. 576 Standard Video Inputs (Coax), 576 Standard Video Outputs - Expandable (Coax), 288 DS-Link Inter-Frame Expansion Outputs & expansion cables. No crosspoint redundancy.