HF2221 Serial Server Device User Manual
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Table 2. HF2221 Interface Definition
Function
Name
Description
External
Interface
Ethernet 1
10/100M Ethernet
LAN function
Ethernet 2
10/100M Ethernet
Default is WAN function in AP mode (Can be
configured to LAN Function), connect to router
LAN port for network access.
In STA mode, it works in LAN function.
Wi-Fi Antenna
SMA Antenna Interface
RS232/RS422/
RS485-1
UART1 Channel
RS232/RS422/
RS485-2
UART2 Channel
Earth
Protect Earth
DC Power
Input
DC Power 5~36V
LED
Indicator
Power
Internal Power Supply Indicator
On: Power is OK
Off: Power is NG
LAN(Net-2)
Ethernet 1 Connection Indicator
On: Ethernet connection is OK
Off: No Ethernet connection
Active-1
UART1 channel data transfer Indicator
Flash: Send data
Off: No data sent
Active-2
UART2 channel data transfer Indicator
Flash: Send data.
Off: No data sent
Link(WiFi)
Network Connection Indicator
On: Include the following condition.
⚫
Ethernt 2 connection OK
⚫
Wi-Fi STA connect to AP
⚫
Wi-Fi AP being connected by other STA
device
Off: No network connection
Button
Reload(Reset)
Press down for 4 seconds and then up, the device
will restore to factory setting and reboot.
