4-4RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide
Figure 4-3 shows the rear panel power supplies.
Figure 4-3. Rear panel power supplies
Expansion Pedestal Components
The expansion pedestal contains a 16-bit, wide/differential UltraSCSI bus, an Environmental Monitor Unit (EMU), a SCSI bus extender module, and two universal 50/60 Hz, 100–240 VAC fan-cooled power supplies.
The single-ended UltraSCSI bus is factory-configured as one continuous bus that runs along the backplane between the disk drive connectors and the internal cables. These cables connect the drives to the connectors located on the rear panel of the expansion pedestal. The device addresses on the bus are set at the factory by an internal configuration switch. When set to a specific position, the switch controls the addresses of each SBB slot.
