20 slots VME RackFrame: 19 inches / 7U / 320 mm High speed VME bus (8 layers) P1 20 slots with automatic chaining P2 20 slots Powerful and silent fan-cooling High quality finish Primary power supply 85V to 264VAC Power output 600W Checks: power supplies, temperatures, Acfail, Sysfail Bus activity displayed by a BARGRAPH