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WESTERMO DDW-120 INDUSTRIAL ETHERNET EXTENDER

Introduction

Use existing telephone lines to establish a high-speed remote connection between two Ethernet networks.

Features

By design, a standard Ethernet network is limited to a 100m distance for point-to-point transmissions over copper cables. For greater distances, standard UTP Ethernet cables cannot be used. To create a high-speed link between two distant Ethernet networks, an extender is necessary. Westermo’s DDW-120 Ethernet Extender is the ideal solution for extending your Ethernet network over copper cables, whereas, in the past the only option would have been fibre.

At shorter ranges the data rate will be as high as 15.3 Mbit/s in both directions. The technology used suggests transmission distances of up to 10 km at lower data rates, depending on the quality of the cables. In practical applications, however, much greater distances have been achieved.

The SHDSL transmission technology makes the DDW-120 perfect for the re-use of existing copper cable installations from older communications networks. It is transparent for multicast addressing, VLAN packets, allows VPN pass-through for IPSec and can be used with protocols like MODBUS/TCP and Profi net I/O.

The units will auto negotiate the transmission speed but can also be forced to choose a slower (more reliable) or faster (less reliable) data rate. DDW-120 can be used in point-to-point applications or as start or termination unit together with DDW-220/221/222/225 in daisy-chain applications.

Easy configuration and diagnostics

The DDW-120 is a very simple device designed to be transparent to all protocols meaning that the installation and configuration is very simple - no software configuration is required to make the units operational.

When long or poor cabling is used some settings can be adjusted via DIP-switches for optimised performance and the unit is also supplied with an advanced diagnostic utility that allows the installer to analyse the quality of the line and the connection status (requires diagnostic cable).

High reliability for harsh industrial environments

The units are well prepared for use in harsh industrial environments. Total galvanic isolation and transient protection are standard for all interfaces. The line interfaces are also equipped with extensive protection against over-voltages and transients.

The DIN mounted case makes the unit robust and allows for the surrounding air temperature to be between –40 to 70°C. To allow for uninterrupted communication, the units are equipped with redundant power inputs that allow the use of two separate supplies with operating voltage range of 10 – 60 VDC.