PRODUCTS EDITOR’S CHOICE
OPTIMUM PROTECTION
FOR MAN AND MACHINE Questions relating to safety are high-priority in the automation technology industry. The MVK Metal Safety fieldbus module, Murrelektronik’s industrial solution for technical safety installations, reaches the highest standards: Safety Integrity Level 3 (in accordance with IEC 61508 and IEC 62061) and Performance Level e (in accordance with EN ISO
13849-1). Two versions of MVK Metal Safety cover many different applications: one version with only inputs, and a mixed version with inputs as well as outputs. With the IP67 MVK Metal compact module, safe inputs / outputs can also be connected directly to the Siemens Sinumerik 840D SL Profinet CNC, used worldwide, provided that 'safety integrated' is enabled in the control unit. This enables safe data to be transmitted directly from sensors to control unit via the bus protocol. They no longer need to be wired passively in the control cabinet. This enables high safety standards (SIL3 and PLe) to be achieved. There are two inputs on each M12 input terminal. Depending on the application, these can be used for two single-channel or for one two-channel safety circuit. On two-channel applications, the channels can be configured to be equivalent or antivalent to one another. In addition, the discrepancy time is variable. These can be important factors if two sensors exhibit different response times and need to be set precisely to one another. To enable data to be transmitted safety, MVK Metal Safety uses the PROFINET/PROFIsafe transmission protocol. Failsafe data is transmitted by PROFIsafe using the same bus line as non-safe signals. This enables the individual wires in a safe field bus solution to be integrated in standard modules, without this imposing an unreasonable additional burden in terms of time and cost for engineering and installation specialists. This is the key to an enormous potential saving in terms of wiring. In addition, an existing field bus solution can be upgraded into a safe system without the need for major modifications. Alongside versions with 7/8-inch power connection and M12 connection for field bus lines, Murrelektronik provides a module with push-pull connection technology, suitable for defined areas of the automotive sector. The advantage of these is that the lines to the module can be plugged in by hand, without the need for tools. Murrelektronik features a wide portfolio of emergency stop
and reset buttons suitable for integration in technical safety applications. These control and monitoring devices can be connected via pre-configured M12 lines (with four, five or eight pins). A time-saving solution excluding the risk of wiring faults. The ‘plug & play’ feature makes it possible to integrate command devices in machines and systems much faster. All components with an illuminated reset button come with several coloured inserts. It is easy to attach these to the LED, thereby changing the colour.
www.murrelektronik.co.uk
34 JULY/AUGUST 2018 | ELECTRICAL ENGINEERING
SUBSTATION BATTERY TESTING AND MONITORING B
atteries are crucial components in the overall reliability of powerplants, substations, telecommunication systems, generator excitation systems and protection and control systems. The inability of a battery string to provide sufficient voltage/power to protection circuits may lead to catastrophic consequences that cause damage to site equipment, resulting in reduced safety and costly downtime. Listening to the
demands of test engineers from around the world, DV Power have developed battery testing and monitoring solutions to meet IEEE and IEC standards, alongside a wide range of customer specific test procedures. The essential test for the condition assessment of a battery string is the capacity test that can be carried out using the BLU series of Battery Load Units. In addition to this critical test the DV Power portfolio of battery test equipment is designed to measure and monitor intercell connection voltage, internal resistance, cell and ambient
temperature and cell voltage. On completion of testing the DV Power BAC25A Battery Charger can be used to rapidly recharge the tested lead-acid and Ni-Cd batteries.
DV Power are renowned for using
cutting-edge-technology to produce light, powerful and highly accurate battery, circuit breaker and transformer test equipment. Intuitive controls allow for manual and fully automated test procedures. Easy to use analytical software ensures that DV Power test instruments are efficient whilst remaining user friendly. DV Power are represented in the UK and Ireland by
Sussex based Drallim Industries, whose team of experienced engineers offer full product support. DV Power provides a three-year warranty on all test instrumentation. This is a guarantee to Drallim’s customers that they will receive high quality test equipment.
Drallim T: 01424 205140
www.drallim.com
STAY ON TOP FORM THIS SUMMER WITH THE TRADE ACTIVE POLO
Scruffs is committed to kitting out trade professionals in workwear that works as hard as they do. As the thermometer rises over the summer months, Scruffs understand how important it is to stay cool and comfortable when working in a physically demanding profession. The latest addition to the Scruffs
collection, the Trade Active Polo, is designed to be lightweight and quick- drying, and comes in two stylish colours: Black and Graphite. With a design that includes incorporated mesh panels for improved breathability and a raglan sleeve for improved comfort, workers are able to cool when work gets tough during the hottest days. A smart button placket with collar and a dropped back hem ensure a comfortable fit and a smart look throughout the day and after work. The polo also includes a blank left chest, perfect for company profiling. Engineered with the latest workwear technology, the Trade Active Polo is durable and hardwearing for a wide range of trade and industrial environments, and smart enough to wear for after-work drinks.
Scruffs Workwear T: 0115 938 9000
www.scruffs.com
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 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44
