Communication options for Brownfield projects – Reusing RS-485 Cables to run Ethernet.
1 February, 2010
What do we mean by “Brownfield”. Brownfield in its most basic definition refers to projects where work is to be carried out on existing infrastructure, as opposed to a “Greenfield” project where you are starting from a clean slate.
Installing new communications media such as fibre may not be an option. This could be for a variety of reasons, such as project time frames, labour costs, or complexity of running new fibre. We would like to take this opportunity to highlight some key products that are specifically designed for such situations.
As most legacy communications networks typically use twisted pair copper cables for PLC communications these can be reused for transmission of Ethernet communications using Westermo’s Wolverine family of Ethernet Extenders. A typical scenario could be the upgrade to new PLC or VSD’s that use Ethernet as its communications interface rather than RS485.
In particular Westermo Model DDW-222 allows for a direct drop in to a control node in a Multidrop topology of an RS485 Network, and thus utilizing the existing twisted pair cable for Ethernet communications. In addition the DDW-222 also provides a serial interface to connect with any existing or legacy serial enabled devices. Distance between any two DDW’s can be in excess of 10Kms with bandwidth capable of handling typical PLC, VSD or even CCTV traffic.
Whilst the DDW-222 model is suited to multidrop type topology’s there is also a very simple Point to Point solution where you simply want to extend Ethernet between two locations using Model DDW-120.
We welcome the opportunity to discuss your application and see how Westermo unique communications platform can provide you with a very cost effective solution to what would otherwise be a costly exercise.
