Com1/Com2 Rs232/Rs422/Rs485 Select (Mb331-Crm); Com1/Com2 Rs232/Power Select (Mb331-Crm) - DFI WM343-MB User Manual

COM1/COM2 RS232/RS422/RS485 Select (MB331-CRM)

JP1
JP2
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.
JP1/JP2
2 4 6
1 3 5
1-2 On: RS232 3-4 On: RS422
(default) Full Duplex
COM 1 / COM 2
1 2 3 4 5 1 2 3 4 5
6 7 8 9 6 7 8 9
RS232
Full Duplex
Chapter 4 Jumper Settings
2 4 6 2 4 6
1 3 5
1 3 5
5-6 On: RS485
1 2 3 4 5
6 7 8 9
RS422 RS485
Chapter 4

COM1/COM2 RS232/Power Select (MB331-CRM)

1
2
1-3 (RI), 2-4 (DCD) On:
3
4
RS232 (default)
5 6
1
2
3-5 (+5V), 4-6 (+12V) On:
3
4
RS232 with power
5 6
22
JP9
JP10
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