User`s manual

W406 Hardware User’s Manual Hardware Connection Description
Connecting to a Serial Device
Use a serial cable to plug your serial device into the embedded computer’s serial port. Serial ports
P1 to P2 have male DB9 connectors and can be configured for RS-232, RS-422, or RS-485
communication by software. The pin assignments are shown in the following table:
DB9 Male Port RS-232/422/485 Pinouts
12345
6789
Pin RS-232 RS-422
RS-485
(4-wire)
RS-485
(2-wire)
1 DCD TxDA(-) TxDA(-) ---
2 RxD TxDB(+) TxDB(+) ---
3 TxD RxDB(+) RxDB(+) DataB(+)
4 DTR RxDA(-) RxDA(-) DataA(-)
5 GND GND GND GND
6 DSR --- --- ---
7 RTS --- --- ---
8 CTS --- --- ---
Connecting to the Serial Console Port
The serial console port, located on the bottom panel of the W406, port is a 4-pin pin-header
RS-232 port. It is designed for serial console terminals, which are useful for viewing boot up
message.
Serial Console Port & Pinouts Serial Console Cable
4
3
2
1
Pin Signal
1 TxD
2 RxD
3 NC
4 GND
Connecting an Antenna
The W406 embedded computers come with a 1 dBi antenna for GSM/GPRS/EDGE
communication. Connect the antenna to the SMA connector located on the front panel of the
embedded computer. Connect the antenna to the computer by rotating it in a clockwise direction.
Antenna Connector
GSM/GPRS/EDGE Antenna
3-5