EAX-Q77
User’s Manual
26 EAX-Q77
User’s Manual
2.6.3
Serial Port 1 Signal Select Jumpers (JRS1/JRS2/JRS3)
JRS1
Signal
PINS
Signal
RXD232
1
2
RD1
RXD 422
3
4
RD1
RXD 485
5
6
RD1
RS232
(Default)
RS422
RS485
JRS2
Signal
PINS
Signal
RS485_B
1
2
RS485_A
NDCD1_D-
3
4
NRXD1_D-
NDCD1-
5
6
NRXD1-
JRS3
Signal
PINS
Signal
RS422_B
1
4
NTXD1_D-
RS422_A
2
5
NDTR1-
NDTR1_D-
3
6
NTXD1-
RS422/RS485
RS232
RS422
RS232