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Can it for compliance: Jonathan Newell met Ben Green of Harwin at the EDS event in Coventry to find out the latest in electronics connectivity and EMC compliance.

The challenges for the electronics industry to meet the latest demands of industrial systems and home automation are considerable. The Internet of Things--whether industrial or commercial--is connecting everything and as many as 20 billion devices will be connected by the end of the decade, according to Gartner.

With such an explosion in connectivity, the boundaries of miniaturisation and EMC compliance will be pushed and electronics assembly manufacturers are increasingly looking to the supply base to help them meet the challenge.

One such supplier, Harwin, was at the Engineering Design Show at the Ricoh Arena in Coventry in October, so I went along to discuss the way the company is responding to industry needs with Harwin's head of new business, Ben Green.

CONNECTION IN MINIATURE

Green demonstrated the range of connection products available from Harwin, including its latest addition, the Gecko 1.25mm high reliability connector. This dual-row interconnect for stacking and cable mating has been designed to meet the increasing levels of miniaturisation demanded by the Industrial Internet of Things (IIoT), as well as the expected influx of home automation products.

It has a low profile and is both 35% smaller and lighter than the Micro-D style of connectors which the Gecko can replace in assemblies that require more compact packaging or higher reliability. "It's available at commercial off-the shelf pricing with some premium due to the increased reliability it provides," Green explained.

The requirement for high reliability-products is typical of the customers in the space, defence and aviation industries that form an important part of Harwin's client base.

In terms of reliability, the Gecko features a 4-finger beryllium copper contact design which is resistant to high vibration and shock, a specification which has led to successful design-ins on numerous aerospace and space applications, including Unmanned Aerial Vehicles (UAV) and satellites.

However, according to Green, it isn't just military and aviation applications that can benefit from the Gecko. With a COTS pricing structure, such high-end reliability is also available to the medical sector, smart homes and industrial products such as drives, controls and automation.

The Gecko high reliability connector also features a 4-point spring loaded connection, a data sheet on data transmission and EMC compliance and a metal back shell and braid to protect the signal as it passes through the connectors.

HIGHER INDUSTRIAL VOLUMES

Harwin's mainstream client sectors are split into three areas including drives and controls, avionics & defence and home automation, which also includes medical and security systems such as access control.

Such business areas do not benefit from the high volume consumer goods industry, which is predominantly catered for in China and other offshore locations. However, according to Green, the IoT explosion is creating a higher volume market in industrial and other traditionally lower volume sectors.

So far, the company has not penetrated the automotive market to any great extent, although with the increase in wireless modules being used within automotive electronics, Harwin is already seeing a big impact in the market with big growth being expected.

EMC COMPLIANCE IN PROTOTYPING

With miniaturisation comes a more crowded EMC environment, and Harwin is also helping its customers to stay compliant when coming up with new PCB designs. To this end, the company has recently hired an EMC specialist, who can provide test reports and also become involved in new product development both at Harwin and in collaboration with clients.

The company's EZ-BoardWare range includes products that deliver effective EMI/RFI Shielding. EZ-BoardWare Shield Cans are simply pressed onto pre-positioned surface mount EZ-Shield Clips forming a Faraday cage around sensitive ICs and electronic circuitry, saving expensive, labour-intensive secondary assembly and facilitating rework.

This simple EMC shielding technology can also be configured for new designs, and Harwin can supply developers with a shielding kit, so that engineers can create their own bespoke shielding can, before submitting a product design specification to Harwin and committing to high volume production.

The kit follows the simple idea of using standard SMT-mounted clips, which come in a range of sizes, and then using a shielding can formed from two 80 x 60 x 0.3mm thick Nickel Silver sheets that are pre-scribed on a 5mm grid to allowing easy cutting and forming, enabling the engineer to produce a shield can of the required dimensions.

Taking such an approach enables application engineers to make design alterations, produce prototypes, test them, modify them and verify the final design before choosing the final configuration of the clip and can.

This also saves expensive, labour-intensive secondary assembly and facilitates rework. According to Green, typically engineers have had to order bespoke cans during development and test without being 100% certain of their eventual requirements, incurring costs and creating delays. Now they can perform this work with the standard kit.

The nickel-silver material used in the kit provides effective and useable shielding, with up to 24dB attenuation, depending on frequency and configuration.
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Title Annotation:MINIATURISATION
Author:Newell, Jonathan
Publication:Environmental Engineering
Date:Dec 1, 2016
Words:812
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