Omron SYSMAC C500, Руководство по установке

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Section 3
Assembly
22
Introduction
When we speak of a PC, we usually think of it as a single object. But actually
even the simplest PCs are usually composed of several different devices. In
fact a single PC can be physically spread throughout a building, but we still
call it one PC.
In this section, we will start with a Backplane and use all the Units discussed
in
Section 2 Description of All Components to build a PC.
3-1 Mounting the Units
There is no single Unit that can be said to constitute a Rack PC. To build a
Rack PC, we start with a Backplane. The Backplane for the C500 is shown
below.
C500 Backplane
The Backplane is a simple device having two functions. The first is to provide
physical support for the Units to be mounted to it. The second is to provide
the connectors and electrical pathways necessary for connecting the Units
mounted to it.
The first device we will add to the Backplane is a Power Supply. The Power
Supply fits into the rightmost position on the Backplane and provides electric-
ity at the voltages required by the other Units of the PC. It can also be used
to power devices other than the PC if necessary.
Power Supply
The core of the PC is the CPU. The CPU contains the program consisting of
the series of steps necessary for the control task. The CPU fits into the posi-
tion directly to the left of the Power Supply.
CPU