The DDW-220 is an Industrial Ethernet SHDSL extender with a built-in Ethernet switch. It is designed as a transparent Ethernet Extender for 10/100BaseTX networks and is the ideal solution for extending Ethernet networks over copper cables where in the past the only option would have been fibre.
The Ethernet Extender has two SHDSL interfaces and can therefore be used to create a multidrop network. With its built in four-port Ethernet switch the DDW-200 need be the only unit required to build a complete Ethernet solution.
The DDW-220 is built around four different circuit boards. The backplane connects to a power board, CPU board and a DSL board. All communication between the boards are made via the backplane. The power board converts the external voltage (16–60 V) to internal voltage levels. The power board also has a high level of protection circuits to handle power disturbances in a harsh environment.
The DSL board consists of two separate SHDSL lines with state of the art DSL chip technology. Each DSL chip supports G.SHDSLbis making it possible to communicate at up to 5,7 Mbit/s over long distances. Each DSL line interface is protected using an over-voltage/over-current protecting circuit (TBU) making it possible to deal with noise on the DSL lines and still maintain communication.
The CPU board handles all communication within the DDW-220 and also controls all switching between Ethernet ports and DSL ports. The switch-core mounted on the CPU board supports wire speed communication between all Ethernet ports. The complete unit is encased in a high quality housing making it possible to handle harsh EMI environments and extreme climatic conditions.
Loop signature Part 2-5: Interactive control systems
Fieldbus & Industrial Networking
Feedforward control was explained in the previous loop signature articles. One of the examples used was feedforward control of load changes on a heat exchanger when variations occurred in the flow of the process fluid through the exchanger.
Read more...Integrated automation systems in poultry feed production Adroit Technologies
Fieldbus & Industrial Networking
South Africa’s poultry industry is increasingly turning to advanced automation systems to optimise operations. Working in partnership with Adroit Technologies, leading poultry supplier Sovereign implemented the Mitsubishi Adroit Process Suite across a key feed production facility, creating a scalable, integrated system capable of supporting both current operations and future expansion.
Read more...Why secure industrial communication depends on deployment as well
Fieldbus & Industrial Networking
The Industrial Security Harmonisation Group has released a joint industry perspective highlighting a critical truth in industrial cybersecurity: secure communication is not determined by protocols alone, but by how they are deployed and managed in real-world environments.
Read more...A single platform for all automation functions Beckhoff Automation
Fieldbus & Industrial Networking
The introduction of TwinCAT in 1996 marked a decisive evolutionary step for PC-based control. Today, the TwinCAT platform combines all automation functions in a strictly deterministic real-time environment, from PLC and motion control through CNC and measurement technology and beyond, to vision, robotics and pioneering AI tools.
Read more...Loop signature Part 2-4: Feedforward Control: Part 3 Michael Brown Control Engineering
Editor's Choice Fieldbus & Industrial Networking
In the previous articles in this series, the basic theory behind feedforward control was discussed, and it was also shown how to apply feedforward in practice. In this article, it will be shown how well feedforward can work in practice by giving a couple of examples.
Read more...Control Station and Dimension Software partner to connect control performance monitoring with enterprise operations intelligence
Fieldbus & Industrial Networking
Control Station has entered into a strategic technology partnership with Dimension Software, a leading provider of industrial operations management platforms. The collaboration connects Control Station’s PlantESP control loop performance monitoring platform with Dimension Software’s Asset Intellect operations intelligence environment, enabling manufacturers to operationalise control performance insights across their organisations.
Read more...Precise, synchronised control for automated steel mesh handling system
Fieldbus & Industrial Networking
Automation specialist Hambi Maschinenbau has developed a world-first system that automates the cutting, handling and stacking of heavy reinforcing steel mesh – a task that previously required up to six human operators.
Read more...Loop signature Part 2-3: Feedforward Control: Part 2 Michael Brown Control Engineering
Editor's Choice Fieldbus & Industrial Networking
Feedforward control tuning is not nearly as critical as feedback tuning, and fairly simple models are usually fine for the purpose in hand.
Read more...Upgrading radiological surveillance systems in nuclear facilities Omniflex Remote Monitoring Specialists
Fieldbus & Industrial Networking
Nuclear plant operators face an uncomfortable reality. Many of the control and monitoring systems still in use today were never designed to support the full operational lifespan of the facilities they serve.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version