Indicator light of serial to ethernet converter USR-N520

Indicator	Description
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

 

Dial Switch

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.