© National Instruments | 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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