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Serial Tunneling / Others


Communication between two serial devices via a serial interface (RS232, RS485, or RS422) has a limitation of distance (the distance is limited to 15m for RS232, and 2km for RS422/RS485). Serial Tunneling allows us to overcome this limitation. With Serial Tunneling, two serial devices can communicate with each other from anywhere.


How It works

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Each Serial device will connect to a Serial-to-Ethernet or a Serial-to-WiFi converter. Two serial converters will connect to each other (TCP server-client model) via a local LAN/WLAN, or even the Internet. Two serial converters can also connect directly to each other via an Ethernet cable. This creates a serial tunnel between two Serial Devices.


Further more, the Serial tunneling is NOT ONLY created between two Serial Devices BUT ALSO created between a serial device and a serial software on PC. In this case, we provide a free software (namely ezVSP) that acts as a virtual serial-to-Ethernet/WiFi converter for your serial software

serial tunneling

In the case serial device uses Modbus RTU, the Modbus Gateway should be used instead of general Serial Converter.



Converters can be used for the Serial Tunneling




Application Examples


  • Single Serial Tunnel
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  • Two Serial Tunnels
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  • Four Serial Tunnels
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FAQ:


In an application, Is it possible to use different models of the serial converter on two sides?
⇒ Yes, you can mix any model of serial converter for an application

How many serial tunnels can be created by using two serial converters?
⇒ It depends on the number of serial ports that a converter is equipped with. For example, two CSE-T32 can create 32 serial tunnels.

Is this possible that one serial device on one side of the tunnel exchanges data with multiple serial devices on another side of the tunnel?
⇒ Yes, there are two use-cases:
  – Multiple serial devices share the same serial line (RS485/RS422) and share the same tunnel
  – Multiple serial devices use different tunnels which have the same end. See Multi-monitoring

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