875-000072 User Manual
6
1.2.3.
RS422/RS485 Pin definition
Figure 5 RS422/RS485 pin definition
RS422: R+/R- are RS422 RXD pins and T+/T- are RS422 TXD pins.
RS485: A/B are RS485 RXD/TXD pins.
1.2.4.
LED
Indicator
Status
PWR
On: Power on
Off: Power off
WORK
Flash a period every one second: Working normally
Flash a period every 200ms: Upgrading status
Off: Not working
LINK
LED for Link function. Link function can only work in TCP
Client/Server mode. TCP connection established, LINK on;
TCP connection disconnect normally, LINK off
immediately; TCP connection disconnect abnormally, Link
off with about 40 seconds delay.
Enable Link function in UDP mode, LINK on.
TX
On: Sending data to serial
Off: No data sending to serial
RX
On: Receiving data from serial
Off: No data receiving from serial
Figure 6 LED