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PCA-6154/6154L User's Manual
2.7
Hard Disk Drive LED (CN17)
You can connect a LED to connector CN17 to indicate when the HDD
is active. Marks on the circuit board indicate LED polarity.
2.8
Serial Ports (CN11: COM1; CN10: COM2)
The PCA-6154/6154L offers two serial ports: COM1 in RS-232,
COM2 in 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 ( For example,3F8H
[COM1], 2F8H [COM2]) or disable it, using the BIOS Advanced
Setup program, covered in Chapter 4.
The card mounting bracket holds the serial port connector for the one
port, and the parallel port and serial port adapter kit (supplied with the
card) holds the connector for the other port. This lets you connect and
disconnect cables after you install the card. The DB-9 connector on
the bottom of the bracket is the first RS-232 port, COM1. The DB-9
connector on the adapter kit is the second serial port, COM2.
Table 2-2: Serial port connections (COM1, COM2)
Connector
Function
COM1
RS-232
COM2
RS-232/422/485
2.8.1 RS-232 connection (COM1-CN11)
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.