Atop Technology SE8502-M12 User Manual - Manual (Page 14)

User manual Version 1.1
SE8502-M12 IP68 Serial Server
Copyright © 2010 Atop Technologies, Inc.
All rights reserved
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Fig 7. TCP Client in Virtual COM Mode
2.4.2. Tunneling Mode
Tunneling Mode is used for multiple serial devices to “talk” among one another through SE8502-M12’s through
wireless LAN or wired Ethernet. This mode is particularly useful when two or more serial devices are far away. This
mode can be used to extend the normal serial communication distance of 15 m to 100 m or longer.
One SE8502-M12 can be configured to be the TCP Server Mode with serial device connected and also another
SE8502-M12 is configured as TCP client with serial device connected. After the connection is established, both serial
devices can exchange data to each other transparently. For example, User can implement SE8502-M12 tunneling mode
for Master /Slave mode PLCs or between other serial devices.
Fig 8. TCP Link in Tunneling mode
Configuring SE8502-M12 to Tunneling Mode
Using one of three configuration methods (Telnet, Web, or Console) , user can configure SE8502-M12 to TCP Server
mode with a desired IP address and port, and with other SE8502-M12 is configured as TCP Clients mode with Server
IP and port as destination IP and port respectively.
” Note: TCP client has to assign the destination IP and the destination port corresponding to TCP server’s IP and
listening port (example: TCP 4660 port).
Fig 9. TCP Tunneling Mode