This page contains a Flash digital edition of a book.
News Industry Spotlight Datacentre danger Connectors integrate higher-level of surge protection

As the countdown to the Olympics draws ever nearer to the opening ceremony, businesses are moving with haste to safeguard their IT provisions to minimise disruption. Data centre provider Node4 has seen

growing concerns about the power demands of London data centres as the world descends onto the capital. As a result, the company's data centres outside of London have become much more attractive to firms looking to avoid the limited power resources within the M25. The company has already seen a

surge of interest from customers who are apprehensive about the rising costs associated with London data centres as well as ongoing anxieties about terror threats. It is thought that the Olympics could be the tipping point that could cause outages for those without robust contingency plans in place. Andrew Gilbert, Managing Director of Node4, said: “Although most are hoping the Olympics will go without a hitch, IT managers aren't leaving things to chance when it comes to related pressures on their data infrastructures. There has been much talk previously about the issues faced in London with regards to the growing number of businesses fighting for finite sources of power and during the Olympics, data centres could face downtime. The results could be damaging, par- ticularly for companies where a contin- uous level of service is vital. Data centres in London nearing capacity are particu- larly at risk from Olympics disruption.” Node4:

Hypertac has extended its range of electromagnetic interference-fil- tered and tran- sient-protected connectors to pro- vide greater-levels

of power protection than before. Through a collaboration with

PolyPhaser|Transtector, a sister organisation within Smiths Interconnect, protection against the higher-energy transients asso- ciated with a primary lightning strike or electromagnetic pulse (EMP) can now be integrated.

This approach ensures a high- energy pulse will not enter the main body of equipment but instead will be stopped at the chassis wall, enhancing equip- ment reliability and maintain- ability in military and aerospace. Transient-protected connectors traditionally use diode technology to shield sensitive circuitry from the energy surges associated with secondary lightning and EMP. The energy levels these diodes can safely absorb are limited by the power rating of the diodes currently available.

For the highest transient levels

(such direct lightning strikes as defined within level five of RTCA D160 Section 22, or primary EMP effects) even more robust energy protection capabil- ities are needed.

Signal types such as power (AC/DC), high-speed digital data, and radio frequency (RF) can be integrated and protected against high-energy transients from direct lightning strikes and EMP pulses ranging from standard EMP to high altitude (HEMP) and non nuclear (NNEMP). Hypertac

A mix of expertise to drive wireless sensor network

In a bid to combine technical expertise to offer enhanced high- performance wireless sensor networking solutions, Linear Technology Corp. has acquired Dust Networks, a provider of low power wireless sensor network (WSN) technology.

This move broadens Linear's product portfolio into key growth areas in industrial process control, data acquisition and energy harvesting.

Commenting on major trends in these markets Erik Soule, Vice President of Signal Conditioning and High-Frequency products for Linear Technology, said: “As

New EU safe water treatment plant

A new water treatment plant has been installed by Harwin at its UK headquarters and manufac- turing facility in Portsmouth. With the investment the com- pany is aiming to improve the quality of finish of its plated parts and reduce the environ- mental impact it makes.

The new plant, which uses resin filter technology, supplied by PureTech, cleans all the rinse water and recycles it back into the plating area.

Electronics MARCH 2012

The heavy metals - gold and tin - cleansed from the water can be reclaimed. Although this is already a common practice for gold, it is an industry first to reclaim the tin using this process. Andrew McQuilken, CEO at Harwin said: “We should also see an improvement in the water qual- ity used in the plating line, which will help maintain a high-quality of plating finish on our products. Currently, by using standard tap water, the level of conductiv- ity in the water is typically 400- 600 microsiemens - recycled water after treatment will be below five microsiemens. Moreover, this new investment puts us ahead of immanent European legislation.” Harwin

the need for wireless sensor networking continues to grow rapidly, efficiency is a major goal across many markets, and collecting more data on the environment is driving the need for cost-effective, smart communicating sensors. Wireless is a critical enabler of such systems and applications because it dramatically reduces the cost of deploying sensors and gathering the information about the physical world. Energy harvesting is another key enabler - the ability to perpetually power such sensors without the need to replace

batteries further reduces the lifetime cost of these efficiency- enabling systems.” Soule went on to say: “Dust Networks offers the lowest power radio technology and most complete networking soft- ware for building industrial grade wireless sensor networks. Combined with Linear's precision low-power sensor interface products and battery- free energy harvesting technol- ogy, we can now offer the industry's highest performance remote monitoring solutions.” Linear Technology Corp.

DC/DC LED driver for automotive

A new synchronous buck-boost DC/DC LED driver and voltage controller has been released by Linear Technology, which can deliver over 100W of LED power. Its 4.7V to 60V input voltage range makes it ideal for a wide variety of appli- cations, including automotive, industrial and architectural lighting. Similarly, its output voltage can be set from 0V to 60V, enabling the LT3791 to drive a wide range of LEDs in a single string. The internal four-switch buck-boost

controller operates from input voltages above, below or equal to the output voltage, ideal for applications such as automotive,

where the input voltage can vary dramati- cally during stop/start, cold crank and load dump scenarios. Transitions between buck, pass-through and boost operating modes are seamless, offering a well-regulated output even with wide variations of supply voltage. The design of the device utilises three control loops to monitor input current, LED current and output voltage.

The driver uses four external switching MOSFETs and delivers from 5W to over 100W of continuous LED power with effi- ciencies up to 98.5 percent. LED current accuracy of 6 percent ensures constant lighting while 2 percent output voltage accuracy enables the converter to operate as a constant voltage source. The device utilises either analogue or PWM dimming as required by the application. Linear Technology


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36