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when +5 V and +12 V power is supplied to the board.
The PCM-4862 offers two serial ports: one RS-232 and one RS-232/
422/485. These ports let you connect to serial devices (a mouse,
printers, etc.) or a communication network.
The serial port connectors are mounted on the bottom edge of the
card. The 10-pin, dual-in-line, male header to the right of the card is
the RS-232 port.
The secondary port, to the left of COM1, consists of a 14-pin, dual-
in-line, male header and can be configured to operate in RS-232, RS-
422, or RS-485 mode. This is done via J32.
1
2
*RS-232
3
4
5
6
J32
* default setting
The IRQ and address range for both ports are fixed. However if you
wish to disable the port or change these parameters later you can
do this in the system BIOS setup. The table below shows the
settings for the PCM-4862's ports.
Port
Address Range
COM1
2E8~3F8
1
1
2
RS-422
RS-485
3
3
4
5
6
5
Interrupt
Default
IRQ4
3F8
Chapter 2 Installation
2
4
6
23
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