Power Cabling; Diskette Drive Data Cabling; Scsi Cabling - NEC MH4500 User Manual

Power Cabling

The internal power cables are connected to the system board, SCSI backplane,
storage devices, and diskette drive. The power cables vary in length and provide
connector sizes to accommodate a variety of supported storage devices and a
flexible storage configuration. Power cables are connected to the SCSI
backplane to provide power to the 3 1/2-inch SCSI hard drives in the device
trays.

Diskette Drive Data Cabling

The diskette drive data cable comes attached to the system board and to the
3 1/2-inch, 1.44-MB diskette drive (see the following figure). The cable has two
connectors, one connected to the system board and one connected to the diskette
drive.

SCSI Cabling

Your system ships with two SCSI cables and two SCSI controllers on the
system board. The cables and controllers are:
T
a narrow three-connector SCSI cable and a SYM53C810AE controller on
the PCI-A bus
T
a wide two-connector SCSI cable and a dual-channel SYM53C896
controller on the PCI-B bus.
The narrow SCSI cable connects to the SCSI CD ROM drive (K) and the SCSI
controller through a 50-pin narrow SCSI connector (G) on the system board (see
the following figure). Two additional connectors are available for optional SCSI
devices (J). The CD ROM drive (K) is the last device on the cable and is
terminated.
The wide SCSI cable connects to the SCSI backplane (A) and the SCSI wide
controller through a 68-pin wide SCSI A connector (E) on the system board (see
the following figure). Termination for up to six hard disk drives (C) is provided
on the SCSI distribution panel (B). A second 68-pin SCSI connector (L) is
available on the system board for connecting optional SCSI devices.
System Cabling A-3