Com 1/Com 2 Rs232/422/485 Select - DFI RM641-HD User Manual

COM 1/COM 2 RS232/422/485 Select

JP17 JP18 JP2
COM 2
COM 1
COM 1/ COM 2:
RS232/422/485
These jumpers allow you to configure the Serial COM ports to RS232, RS422 (Full Duplex) or
RS485. JP2, JP17 and JP18 are used to configure the Serial COM port 1. JP16, JP19 and JP20
are used to configure the Serial COM port 2. The pin functions of Serial COM ports 1 and 2
will vary according to these jumpers' setting.
Chapter 4 Jumper Settings
JP16
JP19
JP20
Chapter 4
6 5
4
3
2 1
1-2 On: RS232
(default)
1 2 3 4 5
6 7 8 9
RS232
JP17 and JP18 (for COM 1)/ JP19 and JP20 (for COM 2)
6
4
2
1-3, 2-4 On:
RS232 (default)
Note:
When COM 1 RS232/422/485 is selected, JP17 and JP18 must be set in accordance
to JP2. And when COM 2 RS232/422/485 is selected, JP19 and JP20 must be set in
accordante to JP16.
19
JP2 (for COM 1)/ JP16 (for COM 2)
5
6 6
4 3 4
2 2
1
3-4 On: RS422 5-6 On: RS485
Full Duplex
COM 1/ COM 2
1 2 3 4 5
1 2 3 4 5
6 7 8 9
6 7 8 9
RS422
RS485
Full Duplex
5
6 5
3 4
3
1 2 1
3-5, 4-6 On:
RS422 Full Duplex/RS485
5
3
1
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