Com 5 - Advantech PPC-6121 User Manual

Pin 9 is set as the RI-Signal-In COM port by default. However, Pin 9 can be set as
5V/12V output via a jumper. 12V: Max. 200 mA; 5V: Max. 500 mA.
3.3.2

COM 5

RS422/485 supports an isolation voltage of 1000 V
BIOS.
Pin
RS422
RS485
UART RS485 auto flow control
COM 5 supports the RS485 auto-flow control function.
When enabling the RS485 auto-flow control function. The system will automatically
drive the RTS# pin to logic high or low for flow control.
1 2
TX+ TX-
D+ D-
37
, which can be selected in the
DC
3 4
RX+ RX-
PPC-6121 User Manual
5
GND
GND