Chapter:
Connectors
Serial Interface COM1
page 36
Beckhoff New Automation Technology
CB3052
3.16 Serial Interface COM1
The serial interface COM1 is made available via a 9-pin standard DSUB-connector. According to the
product order, TTL level signals or RS232 standard signals are provided.
The port address and the interrupt are set via the BIOS setup.
Pinout serial port (DSUB connector):
Description
Name
Pin
Name
Description
data carrier detect
DCD
1
6
DSR
data set ready
receive data
RXD
2
7
RTS
request to send
transmit data
TXD
3
8
CTS
clear to send
data terminal ready
DTR
4
9
RI
ring indicator
ground
GND
5