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 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

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1 serial port server with RS232 or 422 or 485. Serial Device Server. Virtual COM port. Pair connection

kr1,715.00

External COM port via Ethernet and Internet
Can also provide Pair connection (back-to-back)
Small size for easy installation
Genuine COM / TTY drivers for Windows and Linux
Standard TCP/IP interface and versatile operating modes
Easy-to-use Windows multi-device server configuration tool
Built-in 15 KV ESD protection for all serial signals
SNMP MIB-II for network management
Configure via Telnet or web browser
Power supply included

Reference: ETH1SER5150
lens In stock

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

kr1,525.00

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)

Reference: ETH1SER-MINI+
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4 Ports RS232 Extender over fiber cable 1200 - 115Kbps, 4 x DB9 male connector. 100Mbit SFP Multi Mode or Single Mode.

kr2,500.00

4 COM ports via optical fiber cable
point to point or pount to 4 points
4 x RS232 ports up to 2km with multi mode cable
4 x RS232 ports up to 20km with single mode cable
Buy 100Mbit SFP Module (Multi Mode or Single Mode)
1 x 100 Mbit SFP for LC Duplex Fiber cable
4 x RS232 DB9 male connector
Setup via built-in Web server
62 x 50 x 120 mm
DIN fittings
Display 3 LEDs Displays TX / RX, Network and System Status
Supply voltage: 9 - 32VDC Redundant (not supplied)

Reference: BOOST-4RS232-FIBER
lens In stock

4 Ports Serialport Server RS422 / RS85, Moxa Nport 5430. Serial Device Server

kr3,000.00

External COM ports via Ethernet and Internet

Easy IP Address Configuration with LCD Panel
10 / 100Mbit Auto-Sensing Ethernet
4 Serial Ports, With Support for RS422, and RS485 < Br> Built-in 15 kv ESD Surge Protection for All Serial Signals
Versatile Socket Operation Modes, Including TCP Server, TCP Client, and UDP
Choice of Configuration Methods: Web Console, Telnet Console, and Windows Utility
SNMP MIB-II for Network Management
-40 to 75 ° C Operating Temperature

Reference: ETH4SER485+
lens In stock

MOXA 2 ports RS232 industriel serielportserver

kr2,812.00

Serielportserver 2 x RS232 / 422 /485 MOXA Nport 5210
Compact design for easy installation
Socket modes: TCP server/TCP client/UDP
Easy-to-use Windows utility for configuring multiple device servers
Supports 10/100M Ethernet
Patented ADDC® (Automatic Data Direction Control) for 2-wire and 4-wire RS-485
SNMP MIB-II for network management

Reference: ETH2SER232+
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1 port serial port server RS232, POE or 12-48VDC. Serial Device Server

kr994.00

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

Reference: ETH1SER-POE-I
lens In stock

3 port serial port server via GSM7GPRS network RS232 / 485 Serial Device Server

kr2,921.00

Seriel port: 2 x RS232, 1 x RS232/485 maks. 115 Kbps
Signaler: RS232: Rx , Tx , RTS , CTS 
RS485: Data +, Data - (2-leder halv duplex)
Digital I/O: 6 indgange og 2 udgange TTL
Protokoller: TCP, PPP
Stik til digital I/O: Skrueterminaler
3/5V SIM kortholder indbygget
3 lysdioder viser GPRS- og systemstatus
Strømforsyning: 9 - 35 VDC maks. 4,8 Watt. medfølger ikke
Leveres med beslag til DIN skinne

Reference: ETH3SER-GSM+