Acer 486 Specifications download pdf (Page 28)

20 PCA-6143P User's Manual

Serial Ports

The PCA-6143P 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.

You can select the address for each port (3F8H [COM1], 2F8H

[COM2] or 3E8H) or disable it, through the BIOS Advanced

Setup program, covered in Chapter 5.

The card mounting bracket holds the serial port connectors. This

lets you connect and disconnect cables after you install the card.

The DB-9 connector on the top of the bracket is the RS-232 port.

The second DB-9 connector is the RS-232/422/485 port. The

following sections tell how to make RS-232 and RS-232/422/485

connections.

RS-232 connections

Different devices implement the RS-232 standard in different

ways. If you are having problems with a serial device, be sure to

check the pin assignments for the connector. The following table

shows the pin assignments for the card's RS-232 port:

RS-232 connector pin assignment

Pin no. Signal

1DCD

2RX

3TX

4DTR

5GND

6DSR

7RTS

8CTS

9RI

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 38 39

No comments

Acer 486 Specifications Page 28