1.3. Indicators
Classification Indicator Description Meaning
Ethernet LINK Network status
indicator
Steady on：Network connection enabled
Flashing：Transmit or receive data
Off：The network port is not plugged into the
network cable
SPD 10/100Mbps
indicator
Steady on：100M network connected
Off：Not connected to the 100M network
Power PWR Power indicator
(220VAC)
Steady on：Normal power supply
Off：No power or abnormal power supply, please
check if the voltage range is 220VAC
POWER Power indicator Steady on：Normal power supply
Off：No power or abnormal power supply, please
check if the voltage range is 9~27VDC
Downstream
Serial Port
RXD RS485/RS422/RS232
data receive
indicator
Steady on：RS485/RS422/RS232 line fault，please
check if the RS485/RS422/RS232 line wiring is correct
Flashing：RS485/RS422/RS232 is receiving data
Off：RS485/RS422/RS232 no receiving data
TXD RS485/RS422/RS232
data transmit
indicator
Flashing：RS485/RS422/RS232 transmitting data
Off：RS485/RS422/RS232 no transmitting data
