Com1/Com2 Rs232/Rs422/Rs485 Select - DFI SB330-CRM User Manual

2
Hardware Installation

COM1/COM2 RS232/RS422/RS485 Select

COM 2
COM 1
JP1 (for COM1) and JP2 (for COM2) are used to configure 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
30
4 6
3 5
COM 1 / COM 2
1 2 3 4 5
JP1 JP2
JP1/JP2
2 4 6
1 3 5
3-4 On: RS422
Full Duplex
6 7 8 9
RS422
Full Duplex
1 1
2 4 6
1 3 5
5-6 On: RS485
1 2 3 4 5
6 7 8 9
RS485