Installation guide

RAID Array 3000 Storage Subsystem Expansion Pedestal Option
1–4 EK–SM3KA–IG. A01
Figure 1–3 Rear Panel Power Supplies
2.2 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 uni-
versal 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 ca-
bles. 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.
The SCSI bus extender module extends the allowable electrical length of the bus
to accommodate longer physical SCSI cable connections between the base and
expansion pedestals.