Chapter 3
I/O Information
©
National Instruments
3-5
COM1
Figure 3-3 shows the location and pinouts for the COM1 connector on the
NI PXI-8820. Table 3-3 lists and describes the COM1 connector signal.
Figure 3-3.
COM1 Connector Location and Pinout
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.
5
1
6
9
COM1
USER2
USER2
USER1
USER1
PWR OK /
K /
FAULT
FAULT
DRIVE
RIVE
TRIG
RIG
RESET
RESET
NI PXI-8820
Embedded Controller
ACT/
ACT/
LINK
LINK
10/
0/100
00
/1000
/1000