Intel SYSTEM 310 Hardware Integration Manual page 23

CHAPTER 2
PART OF THE CHA I
The chassis is the center of the System 310. It contains hardware,
such as the on/off switch and power supply, that you must operate
every time you use the system. Furthermore, the chassis contains
circuit boards and jumpers that you may add, remove, or modify to
customize your system.
The chapter is divided into two sections, the outside and the inside,
which correspond to the hardware mounted on the outside of the
chassis and the hardware mounted inside the chassis. By
understanding the location and function of each part, you may be
more comfortable performing hardware changes to your own system.
HE OU SIDE OF HE CHASSIS
This section focuses on the parts of the chassis you can see and
modify without having to open up the system or take any special
precautions. The parts are:
• Back panel and connectors
• AC power panel
BACK PANEL AND CONNEC ORS
The back of the System 310 chassis consists of a sheetmetal plate
called the back panel and an AC power panel, both shown in Figure
2-1. You must remove the back panel whenever you add, remove, or
modify circuit boards.
The back panel has 24 knockouts designed to fit the various
connectors commonly used to communicate with peripherals and with
other systems. Chapter 3 lists the kinds of connectors you can install
in these knockouts.
Serial and Parallel I/O Connectors
Two connectors, labeled J20 and J24 in Figure 2-1, are already
installed in the back panel of every System 310. (The 286-based
systems include an additional RS-232 connector in J21.) The male
connector in J20 is the RS-232 serial port from the processor board.
The female connector in J24 is the Centronics-type parallel port, also
from the processor board. When you expand the number of I/O ports
by adding communications boards (and their cables), you must also
install the new connectors in one or more of these sites. Figure 2-1
shows the location of each knockout and the type of connector it was
designed to fit.
2-1