Com-Server++ NEW! Modbus/TCP Gateway

W&T added a new operation mode to the Com-Server++, making it a Gateway between a serial Modbus/RTU device and a Modbus/TCP master in the network.

Many devices such as energy meters, measuring transducers, power inverters etc. have an RS232/422/485 interface and communicate via the Modbus/RTU protocol. The Com-Server integrates these devices quickly and reliably into Modbus/TCP environments.

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Com-Servers provide serial interfaces over the network. The devices are suitable for top-hat rail mount and are powered via PoE or a power supply.

  • Virtual COM port
    With the virtual COM port you can use serial devices in the network as if they were connected directly to your computer – even from virtual environments.
  • Cross-location serial communication lines
    In Box-2-Box mode you tunnel your serial data, TLS encrypted if desired, over the network.
  • Individual data access
    using various network protocols on the application layer, via TCP socket as client and server or as UDP peer.

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Application Examples:

Via Com-Server onto S7-PPI network:

Up- and downloading of controller programs as well as status monitoring are handled with the Siemens S7-200 using the PPI interface. Connection to the PC used as a programming device is frequently implemented using the RS232/PPI Multi-Master cable. To extend this connection to a physically remote computer or to access from different work stations, a special serial cable with line drivers and if necessary a manual switcher generally needs to be installed. Alternative use of an Ethernet CP would necessitate modifying the S7 project/program file. In addition, each individual PLC would needs its own CP. Use of a Com-Server on the other hand provides a simple solution that works without any modifications to the controller program and usually eliminates any cabling expense…

Accessing several serial terminal devices over one IP address? IP masquerade makes this possible!

With the growing importance of the Internet, it has become a wish of many companies to make serial terminal devices available in both the intranet and on the Internet, e.g. for remote maintenance and diagnosis. This is possible by means of a Com-Server.

The solution is NAT (Network Address Translation). NAT-capable routers are able to use the limited resources of official network addresses in a more sustainable way by representing a complete intranet with various stations over only one official IP address.

LEARN more about other possible applications…