Advantech AIMB-502 User Manual page 103

B.21 RS-485 terminator jumper setting (J485P)
Table B.21: RS-485 terminator jumper setting (J485P/N)
Pin Pin Name
1 N.C
2 COM1_RS485P
3 COM1_RS485P_T
(1-2): System wasn't set as terminal point / (2-3): System was set as terminal point.
This setting on J485P & J485N should be matched at the same time.
J485P
91
J485N
Pin Pin Name
1 N.C.
2 COM1_RS485N
3 COM1_RS485N_T
AIMB-502 User Manual