SUPPLEMENT PRODUCTS HAZARDOUS AREA EQUIPMENT SINGLE CABLE SOLUTION COMPACT FIELD MOUNTING
Machine and system manufacturers increasingly strive for cost and space reductions and implementation simplicity, with no compromises on performance. With its single cable solution, Hengstler has provided a fitting response to the needs of the market. Safety has to be primordial when considering the aspects of man and machine interaction, but not at the price of having to stop the machine. The single cable solution with its ACURO link interface is designed to ensure a high level of functional safety in servo motor control systems. The data protocol of the
electrical interface meets the requirements of SIL3 according to IEC 61508 and Cat. 3 PLe EN_IOS 13849, while the ACURO AD37 encoder itself, and the IP core in the control, meets requirements from non-SIL to
SIL3 depending on the application scenario. Because of the safety function that can be implemented in the
drive, the machine can keep running thanks to the single cable solution, even if someone is directly in the potentially hazardous zone. A mandatory prerequisite to enable maximum machine reliability and availability. Safety however is only one part of the equation of safety, efficiency and performance. An operating temperature of up to +115°C, an operating speed of up
to 12,000rpm and a low mounting depth of 28mm makes the AD37 one of the most compact absolute multi-turn encoders in its class. In the SIL3 configuration, the high performance encoder known as AD37E sets new standards. Its extra efficiency and performance give a decisive competitive advantage to the drive system.
Hengstler
www.hengstler.de/en
SIMPLIFYING ‘ELECTRICITY AT WORK’ COMPLIANCE
Implementing safe isolation procedures is essential in order to achieve compliance with the ‘Electricity at Work’ regulations. These regulations ensure that workers on- site are not exposed to danger when working on or near live electrical systems. Wiith new tougher sentencing guidelines introduced in February and an increased
emphasis on penalties for putting employees at risk, it is important to make sure procedures and equipment are up to date. Selecting the right tools for the job is critical to implementing an effective
procedure to stay safe during the installation and maintenance of electrical plant and equipment. The essential test tools and equipment needed are a dedicated voltage indicator, a proving unit to verify the voltage indicator, locking off devices with unique keys and a clear method of labelling the hazard. Martindale offers complete kits for proving dead and locking off circuits that
could be hazardous during maintenance. The Martindale VIPDLOK138 and VIPLOK150 safe isolation kits include everything needed to stay safe, lock off and prove dead in compliance with ‘Electricity at Work’ Regulations. The 1000V CAT IV safety rating of the VIPDLOK150 means that it is safe to use in all installation categories as specified in BS EN 61010-1 and with a comprehensive set of MCB lock outs included, you will always have the right equipment to hand to ensure compliance. Martindale VIPDLOK Kits are the simple solution to safe maintenance of electrical plant and equipment.
Martindale
www.martindale-electric.co.uk
INDICATOR HAS LARGE DIGITS By adding compact field mounting instruments to its range of 4/20mA loop powered indicators, BEKA has solved the problem of displaying a process variable in a congested area where space is limited. The new compact 'G'
models have a robust,
IP66 impact resistant GRP enclosure with an 8mm thick armoured glass window, but retain the easy to read displays from the larger models. The new 'G' indicators offer a choice of four 34mm high digits, or five
29mm high digits plus a 31 segment bargraph. All have a wide operating temperature of -400C to +700C and include a square root extractor, 16 segment lineariser and internal calibrator. Instruments are supplied calibrated to customer requirements with a
novel slide-in scale card showing the units of measurement and tagging information. Accessories include a backlight that may be loop or separately powered, dual alarms with isolated solid state outputs, stainless steel legend plates and a pipe mounting kit. Intrinsically safe models are available with ATEX and IECEx certification permitting installation in gas and dust hazardous areas. For applications in Zone 2 or 22, Ex nA and Ex tc approval permit
installation without the need for Zener barriers or galvanic isolators significantly reducing installation cost.
BEKA
www.beka.co.uk T: 01462 438301
S14 APRIL 2016 | ELECTRICAL ENGINEERING
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