User guide

ECW-281B-D2550 Embedded System
Page 37
Pin Description Pin Description
1 DCD 6 DSR
2 RXD 7 RTS
3 TXD 8 CTS
4 DTR 9 RI
5 GND
Table 3-7: RS-232 Serial Port Pinouts
Figure 3-29: RS-232 Serial Port Pinout Location
3.8.5 RS-422/485 Serial Port Connector
CN Type:
DB-9 male connector
CN Location:
See
Figure 1-3
CN Pinouts:
See
Table 3-8
RS-422/485 serial port device can be attached to the DB-9 port on the rear panel.
Step 1: Locate the DB-9 connector. The location of the DB-9 connector is shown in
Figure 1-3.
Step 2: Insert the serial connector. Insert the DB-9 connector of a serial device into
the DB-9 connector on the external peripheral interface. See
Figure 3-30.