Indicator light of serial to ethernet converter USR-N520
|①Power||Indicate power. It is on when power is supplied|
|②Work||Indicate working status. It twinkles when N520 works well. If it is on or off for a period, N520 works improperly, you should cut the power and restart.|
|③TX1||It twinkles when port 1 sends data|
|④RX1||It twinkles when port 1 receive data|
|⑤TX2||It twinkles when port 2 sends data|
|⑥RX2||It twinkles when port 2 receive data|
For RS232 port, dial switch are down, such as the below picture.
For RS485 port, dial switch are up, such as the below picture.
For RS422 port, dial switch on the left are up, dial switch on the light are down.