Owner manual

TANK-GM45 Embedded System
Page 21
Pin Description Pin Description
1 DCD 6 DSR
2 RX 7 RTS
3 TX 8 CTS
4 DTR 9 RI
5 GND
Table 3-8: COM1 Serial Port Pinouts
Figure 3-14: Serial Port Pinout Location
3.4.6 RS-422/485 Serial Port Connector
CN Label: COM3
CN Type:
DB-9 connectors
CN Location:
See
Figure 3-7
CN Pinouts:
See
Table 3-9 and Table 3-10
RS-422/485 serial port devices can be attached to the DB-9 ports on the rear panel. The
COM3 serial port is a RS-422 serial port by default. To change to RS-485, please refer to
the jumper setting (Section
3.3.1).
COM 3 RS-422 Description
Pin 1 TX-
Pin 2 TX+
Pin 6 RX-
Pin 7 RX+
Table 3-9: RS-422 Pinouts