Chapter 1. Cpu Enclosure Description; Cpu Enclosure - IBM R30 Operator's Manual

Chapter 1. CPU Enclosure Description

This chapter contains information about system unit features, parts, and devices on the
7015 Model R30, R40, or R50 CPU Enclosures.

CPU Enclosure

The 7015 CPU Enclosures are rack-mounted CPUs containing a CPU module, I/O module,
media module, and a power supply with a possible optional second power supply.
The CPU module is located in the front half of the CPU enclosure and contains CPU cards,
memory cards, and an I/O card.
The media module is located above the CPU module at the front of the CPU enclosure and
contains a disk drive, CD-ROM drive, an optional media position for either a 5.0GB 8 mm
tape drive, 4GB 4 mm tape drive, 1/4-inch tape drive, or another CD-ROM drive, and an
operator panel assembly containing a 3.5-inch diskette drive. The R50 Media Module has a
position for an optional second disk drive.
The I/O module is located in the rear half of the CPU enclosure and contains two I/O planars
containing a total of 16 Micro Channel adapter slots. The power supply and optional second
power supply position are located above the adapter positions.
A system interface board (SIB) is located next to the I/O module and contains an RS485 port
(in) an RS485 port (out), a Battery Backup Unit (BBU) connector, parallel port, serial port 1,
serial port 2, and serial port 3.
The CPU Enclosure can be installed in a 7015 Model R00 rack with other optional
compatible drawers and devices such as disk drive drawers and SCSI media drawers. The
power distribution system in a 7015 Model R00 rack can contain either a power distribution
bus, power distribution unit, or a battery backup unit. For information about options and
compatible optional drawers that can be used with the 7015 Model R30 CPU Enclosure in a
7015 Model R00 rack, see the Adapters, Devices, and Cable Information manual, form
number SA23-2764.
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Description