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Chapter 3
LEDs, DIP Switches, and Connectors
NI 1450 Series Compact Vision System User Manual
3-10
ni.com
COM1
COM1 is a high-speed RS-232 (DTE) serial port used for connecting to
serial devices, such as PLCs, scanners, and lighting devices.
Note
The Serial Port VIs access COM1 as Port 0.
Figure 3-7 shows the locations of the COM1 DSUB 9-pin connector.
Refer to Table 3-4 for COM1 signal names and descriptions
Figure 3-7.
COM1 DSUB 9-Pin Connector
Table 3-4.
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
C
Common of the NI 1450 main power
6
DSR
Data Set Ready
7
RTS
Ready to Send
8
CTS
Clear to Send
9
RI
Ring Indicator
1
9
5
6
NI 1454
Compact Vision System