Gigabyte MUQ77EI User Manual page 19

13) JRS1 (RS232/RS422/RS485 Select Header)
14/15/16/17) JRS4/JRS5/JRS2/JRS3 (RS232/RS422/RS485 Mode Select Jumper)
JRS5
Pin No. Definition
1 RS422 B Signal
2 -NDTRC_D
3 -NDTRC
1-2 Close: RS422
2-3 Close: RS232 (Default setting)
42
41
JRS4JRS5JRS2JRS3
42
41
1-2 Close: RS232 (Default setting)
5 1
3-4 Close: RS422
6 2
5-6 Close: RS485
Pin No. Definition
JRS2
Pin No. Definition
1
1
2
3
1-2 Close: RS485
2-3 Close: RS232 (Default setting)
JRS3
Pin No. Definition
1
2
3
1-2 Close: RS485
2-3 Close: RS232 (Default setting)
JRS4
Pin No. Definition
1
2
3
1-2 Close: RS422
2-3 Close: RS232 (Default setting)
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1 RS232
2 RXD Signal
3 RS422
4 RXD Signal
5 RS485
6 RXD Signal
RS485 B Signal
-NDCDC_D
NDCDC
RS485 A Signal
NRXDC_D
NRXDC
RS422 A Signal
-NTXDC_D
-NTXDC
Hardware Installation