© National Instruments
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3-5
PXIe-8840 User Manual
Table 3-3.
COM1 Connector Signals
Pin
Signal Name
Signal Description
1
DCD#
Data Carrier Detect
2
RXD#
Receive Data
3
TXD#
Transmit Data
4
DTR#
Data Terminal Ready
5
GND
Ground
6
DSR#
Data Set Ready
7
RTS#
Ready to Send
8
CTS#
Clear to Send
9
RI#
Ring Indicator
Note
: The pound symbol (#) indicates an active low signal.
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