Com1/Com2 Rs232/Rs422/Rs485 Select - DFI MB331-CRM User Manual

COM1/COM2 RS232/RS422/RS485 Select

JP1
JP2
COM 2
COM 1
JP1 (for COM1) and JP2 (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 4 6
1 3 5
1-2 On: RS232
(default)
1 2 3 4 5
6 7 8 9
RS232
JP1/JP2
2 4 6
1 3 5
3-4 On: RS422
Full Duplex
COM 1 / COM 2
1 2 3 4 5
6 7 8 9
RS422
Full Duplex
Hardware Installation
2 4 6
1 3 5
5-6 On: RS485
1 2 3 4 5
6 7 8 9
RS485
2
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