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2.8 Making Connections
The following sections tell how to make each connection. In most cases,
you will simply need to connect a standard cable. All of the connector pin
assignments are shown in Appendix C.
Warning!
Caution!
2.9 CPU Fan power supply connector (CN1)
Provides power supply to CPU cooling fan. Only present when +5 V and
+12 V power is supplied to the board.
2.10 Serial ports (CN2, CN3, CN4)
The PCM-9340 offers four serial ports: three RS-232 (COM 1, 3, 4) and
one RS-232/422/485 (COM 2). These ports allow you to connect to any
serial device (a mouse, a printer, etc.) or to a communication network.
2.10.1 COM3/COM4 RS-232 port (CN2)
The COM3/COM4 series port, consists of 20 pin dual-in-line, male
header.
Always completely disconnect the power cord
from your chassis whenever you are working
on it. Do not make connections while the power
is on. Sensitive electronic components can be
damaged by a sudden rush of power. Only
experienced electronics personnel should open
the PC chassis.
Always ground yourself to remove any static
charge before touching the CPU card. Modern
electronic devices are very sensitive to static
electric charges. Use a grounding wrist strap at
all times. Place all electronic components on a
static-dissipative surface or in a static-shielded
bag when they are not in the chassis. This is
especially important where the ambient air is
very dry.
15
Chapter 2 Connecting Peripherals
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