Com1/Com2 Rs232/Rs422/Rs485 Select - DFI SB331-D User Manual

2
Hardware Installation

COM1/COM2 RS232/RS422/RS485 Select

COM 2
COM 1
JP5 (for COM1) and JP6 (for COM2) are used to confi gure the COM ports to
RS232, RS422 (Full Duplex) or RS485.
The pin function of the COM ports will vary according to the jumper's setting.
2
1
1-2 On: RS232
(default)
1 2 3 4 5
6 7 8 9
RS232
28
4 6
3 5
1 2 3 4 5
JP5 JP6
2
1
JP5 / JP6
2 4 6
1 3 5
3-4 On: RS422
Full Duplex
COM 1 / COM 2
6 7 8 9
RS422
Full Duplex
19
2 4 6
1 3 5
5-6 On: RS485
1 2 3 4 5
6 7 8 9
RS485