Link150 Ethernet Gateway Description

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Introduction to Link150 Ethernet Gateway

This manual is to be used with Link150 Ethernet Gateway. For installation information, see the Ethernet Gateway Link150 Instruction Sheet.

Link150 gateway is a communication device that provides connectivity between Ethernet (Modbus TCP/IP) and Modbus serial line devices, allowing Modbus TCP/IP clients to access information from serial slave devices. It also allows serial master devices to access information from slave devices distributed across an Ethernet network.

Link150 Ethernet Gateway Features

The Link150 gateway supports the following Ethernet protocols:

  • Modbus TCP/IP: Modbus TCP/IP is a protocol, which provides master/slave communication between devices and TCP/IP that provides communications over an Ethernet connection. Modbus TCP/IP is used to exchange data between Link150 gateway and other compatible Modbus TCP/IP devices through TCP port 502.

  • Hypertext Transfer Protocol (HTTP): HTTP is a network protocol that handles delivery of files and data on the World Wide Web. It provides web server functionality through TCP port 80. Remote configuration of Link150 gateway and viewing of diagnostic data is possible using a web browser.

  • Hypertext Transfer Protocol Secure (HTTPS): HTTPS is a variant of the standard web transfer protocol (HTTP) that adds a layer of security on the data in transit through a Secure Socket Layer (SSL) or Transport Layer Security (TLS) protocol connection. HTTPS enables encrypted communication and secure connection between a remote user and the Link150 device.

  • File Transfer Protocol (FTP): FTP is a network protocol that provides the ability to transfer files over the Internet from one PC to another. FTP is used to transfer firmware updates to Link150 gateway through TCP port 21.

  • Simple Network Management Protocol (SNMP): Based on MIB2 format, SNMP provides the ability to store and send identifying and diagnostic information used for network management purposes through UDP port 161.

  • Address Resolution Protocol (ARP): ARP is used to convert IP addresses to Ethernet addresses. ARP requests are sent by Link150 gateway to determine if its address is a duplicate IP address.

  • Rapid Spanning Tree Protocol (RSTP): RSTP is the advanced version of Spanning Tree Protocol, is a link layer protocol executed within bridges or switches.

  • Devices Profile for Web Services (DPWS): DPWS defines a minimal set of implementation constraints to enable secure web service messaging, discovery, description, and eventing on resource-constrained devices.

  • HTTPS and RSTP protocols are applicable only from Link150 firmware version 005.001.015.

  • FTP protocol is applicable only up to Link150 firmware version 005.000.029.

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