Com1/2: Rs-485; Com3: Rs-422/485 - Compal U-BPC User Manual

B.7.2 COM1/2: RS-485
Pin Name
1
RS485_02-
2 RS485_02+
3 NC
4 GND
5 NC
6 NC
7 NC
8
NC
B.7.3 COM3: RS-422/485
Pin Name
1 RS485_422TX3-
▲ Figure B.8 RS-485 Serial Port (RJ-45 connector)
Description
Data-
Data+
Not Connected
Signal ground
Not Connected
Not Connected
Not Connected
Not Connected
▲ Figure B.9 RS-422/485 Serial Port (RJ-45 connector)
Description
Transmit Data-
- 48 -