Serial Port Servers

Equipment with a serial port is usually connected directly to the computer when the distance is less than 15 meters.

With a serial port server (Serial Device Server), the equipment can be connected anywhere on a network so that all network users can use them. This applies to both local and internet. When connected over the Internet, the reach becomes global.

Serial Device Servers

It has the task of making a...

Equipment with a serial port is usually connected directly to the computer when the distance is less than 15 meters.

With a serial port server (Serial Device Server), the equipment can be connected anywhere on a network so that all network users can use them. This applies to both local and internet. When connected over the Internet, the reach becomes global.

Serial Device Servers

It has the task of making a serial port available on a network. It is a compact computer that has an Ethernet network interface and one or more serial ports. Its firmware is only for sending data from the network to the proper serial port and transmitting data received on serial ports to the network. The protocol is TCP / IP (Internet Protocol), so even a serial port server with many ports has only one IP address and each serial port has its own port number.

Three communication methods

In principle, it can be communicated with serial port servers in 3 different ways:

  • The "Winsock" method
  • "Virtual com driver" method
  • "Box to box" method

Used if there is no computer with network function available. The two serial port servers are configured to send data to the counterpart. They are defined as "Master" and "Slave", each with its own IP address and the counterparty's IP address. In principle, it is a fixed connection between the serial ports and it is important that the connection be independent of operating systems and software versions otherwise used on the network.

The "Box to box" method is also the only usable solution in cases where the system cannot include software that uses "sockets" or COM port drivers, for example. a PLC and a simple measuring port with serial port.

In all common programming languages ​​for Windows (Visual C ++, Visual basic, Delphi and others), TCP / IP is accessed via "Winsock", releasing the programmer to kno

The "Winsock" method

This method assumes that the applications using the serial port server have access to the network via the TCP / IP protocol using the networking features built into Windows. It is the standardized interface for these features called "Winsock".

In all common programming languages ​​for Windows (Visual C ++, Visual basic, Delphi and others), TCP / IP is accessed via "Winsock", releasing the programmer to know all the details of the underlying network protocols.

Once the protocol, IP address, port number and client / server status are selected, free-form data blocks can be exchanged between the program and the serial port server.

Many types and variants

There are a variety of variants among serial port servers. The number of serial ports per. unit varies from 1 to 16, and the serial ports can be traditional RS232 ports with "point to point" connection up to approx. 15 m or RS422 ports with balanced "point to point" signals up to approx. 1200 m and RS485 ports, for "multidrop" connection, where up to 32 serial ports can share the same 2- or 4-wire bus. Here, the range will also be up to 1200 m.

Most serial port servers use the wired Ethernet network interface, others use wireless networks (Wifi) or fiber optic cable, where the network connection is via fiber optic cable.

Serial Port Servers

There are 47 products.

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  • Seriel portserver til Ethernet

    Seriel portserver til Ethernet

    External COM port over Ethernet and Internet.
    RS232 seriesport via DB9 Han, or
    RS422 / 485 port via screw terminal block
    Power supplied from 12 - 48VDC. Has redundant DC input.
    DIN mounting

    Price 1,367.00 DKK
    Product code: ETH1SER-P
    On the way in  
  • 1 port serial port server...

    1 port serial port server RS232, POE or 12-48VDC. Serial Device Server

    External COM port via Ethernet and Internet
    RS232 Serialport via DB9 male
    Power supplied from PoE
    can be powered from 12 - 48VDC / 1.7 watts
    Short Power Jack Pigtail Cable included
    Purchase Power supply, not included
    1 x RJ45 with PoE input
    DIN mount
    Operating temperature: -25 - + 75 ° C
    Dim: 90 x 52 x 27 mm

    Price 994.00 DKK
    Product code: ETH1SER-POE-I
    Physically in stock  
  • Ports 2 MODBUS...

    Ports 2 MODBUS serielportserver 1 x RS232 + 1 x RS422 / 485th Serial Device Server Box Box option

    Modbus over the Ethernet or Internet
    MODBUS server with 1 x RS232 and 1 x 422/485
    Can run Device to Device
    0/100 Mbps Ethernet port, auto MDI / MDIX, 10/100 auto, 1500V magnetic insulation only on
    RS485 RS232 Modbus ASCII / RTU port, 1 RS422 / 485 Modbus ASCII / RTU port, 16V / 400W TVS isolated, RS485 automatic line control
    9 ~ 30VDC power input, IP30 enclosure , DIN rail mounting structure, USB port (Modbus serial port expansion and capture of memory)

    Price 2,893.00 DKK
    Product code: ETH2MOD
    Physically in stock  
  • 4 Ports serial port server...

    4 Ports serial port server RS422 / 485 Serial Device served 1 x RJ45, 2 x SFP slot

    Monitor, manage and manage industrial devices
    1 x RJ45 Ethernet port
    2 x SFP slot for fiber transceiver (SM or MM)
    Industrial EMC protection, temperature operation wide, -40 ° C ~ 85 ° C
    Fast-Ethernet 2 x 100/1000 SFP Slots with RSTP Redundancy
    4 software Selected RS485 / RS422 Serial ports, up to 921Kbps
    TCP Server / Client, UDP, Virtual com and tunneling modes supported
    Embedded Security with PPTP, IPSec or OpenVPN Client / Server
    Redundant 12 ~ 48 VDC Power Entries
    Configuration via Web Browser / Serial Console / Telnet / Windows Utility
    Robust Metal Cabinet with wall or DIN rail

    Price 7,713.00 DKK
    Product code: ETH4SER-A-I
    On the way in  
  • 4 Ports serial port server,...

    4 Ports serial port server, RS232 / RS422 / RS485 Serial Device Server for fiber network, 2 x SFP ports

    Monitor, manage and manage industrial devices
    2 x SFP slot for fiber transceiver (SM or MM)
    Industrial EMC protection, temperature operation wide, -40 ° C ~ 85 ° C
    fast- Ethernet 2 x 100/1000 SFP slots with RSTP Redundans
    4 software Select RS232 / RS485 / RS422 serial ports, up to 921Kbps
    TCP Server / Client, UDP, Virtual com and tunneling modes are supported
    Embedded security with PPTP, IPSec or OpenVPN Client / Server
    Redundant 12 ~ 48 VDC Power entries
    Configuration via Web Browser / Serial Console / Telnet / Windows Utility
    Robust metal cabinet with wall or DIN rail mounting

    Price 5,715.00 DKK
    Product code: ETH4SER-A
    On the way in  
  • 1 port serial server RS232...

    1 port serial server RS232 / RS422 / RS485. Serial Device Server RJ45, DB9, 9 - 30VDC

    External COM port over Ethernet and Internet
    RS232/422/485
    Atop SE5201-DB Serial Device Server
    10/100Mbit Ethernet.
    Serial port via DB9 male connector
    Supports TCP Server/Client, UDP, Virtual COM and Tunneling modes
    Power is supplied from 9 - 30VDC or 5VDC (power jack)
    Power supply not included
    DIN kit (option)
    Dimensions: 65 x 78 x 28mm (without wall bracket)
    Dimensions: 88.5 x 84 x 27.8mm (with wall bracket and DB9 port)

    Price 1,525.00 DKK
    Product code: ETH1SER-MINI+
    Physically in stock