
Chapter 3 LEDs, DIP Switches, and Connectors
NI 1450 Series Compact Vision System User Manual 3-10 ni.com
COM1COM1 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.
Figure3-7 shows the locations of the COM1 DSUB 9-pin connector.
Referto 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
1DCD Data Carrier Detect
2RXD Receive Data
3TXD Transmit Data
4DTR Data Terminal Ready
5 C Common of the NI 1450 main power
6DSR Data Set Ready
7RTS Ready to Send
8CTS Clear to Send
9RI Ring Indicator
1
95
6
NI 1454
Compact Vision System