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Chapter: Connectors
3.4.2 Serial ports COM2 to COM4
The three serial ports COM2 to COM4 are made available via a 2x5 pin connector each (FCI 75869-301LF,
mating connector FCI 71600-610LF). 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 COM connector:
Description
data carrier detect
receive data
transmit data
data terminal ready
ground
page 34
Name
Pin
DCD
1
RXD
3
TXD
5
DTR
7
GND
9
Name
2
DSR
4
RTS
6
CTS
8
RI
10
VCC
Beckhoff New Automation Technology CB1050
Internal Connectors
Description
data set ready
request to send
clear to send
ring indicator
5 volt supply
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