PPC-3150/3170 User Manual 48
COM1&2
COM4&5
COM3: RS422/485 isolated 1000 V
DC
, which can be set in BIOS.
UART RS485 Auto Flow Control
COM3 supports RS485 auto flow control function.
When RS485 auto flow control function is enabled, it will drive RTS# pin to high or
low level.
In order to enable RS485 auto flow control function, please refer to the below three
ways to set parity bit and stop bit.
(1) 8 data bits + 1 parity bit + 1stop bits
(2) 8 data bits + 1 parity bit + 2 stop bits
(3) 8 data bits + 2 stop bits
Pin 1 2 3 4 5
RS422 TX+ TX- RX+ RX- GND
RS485 D+ D- GND
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