Feature: Test & Measurement


ReeR’s EOS and MICRON light curtains keep vertical storage carousels safe and measured


By Mark Weymouth, Managing Director, PLUS Automation – UK Importer and representative for Contrinex, Reer & Satron – Helping engineers #MakeSenseofSensors


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eeR Safety recently developed a specific solution for one of the world’s leading manufacturers of automated warehouses,


specifically, their next-generation vertical warehouse drawer carousels. Vertical carousel storage units, by


stacking drawers vertically, one above the other, save up to 90 per cent of floor space, utilising height rather than floor area. Vertical automated storage carousels are popular for storing smaller items, reducing operator intervention, preventing material damage and improving inventory management. Their operation is straightforward,


with metal trays retrieved from the warehouse and deposited in picking bays by an automated elevator. Visual aids and an intuitive interface help reduce picking errors and increase the efficiency of operational processes.


ReeR provided machine safety and


material measurement solutions. The application included the


following requirements and regulations: • Minimised cross-sectional dimensions to enable embedding the barriers into the machine’s structure


• Vertical and horizontal protection with the installation of ‘L’ shaped light curtains in the machines which have an external bay


The functional requirements for the measurement barriers, included: • Ensuring consistent reading at any position of the drawer: left side, right side and centre


• The ability to measure small objects (even less than 4 mm) as the trays pass at high speed in front of the measurement light curtain


• Immunity to optical reflections • Serial output


30 Dec 2024/Jan 2025 www.electronicsworld.co.uk


Safety Requirements ReeR Safety’s EOS2 safety light curtain with a 30 mm resolution was chosen because its small size enabled it to be perfectly embedded into the machine’s structure, providing lateral protection. The ‘L’ shaped position of the barriers,


following the Master and Slave logic, ensures maximum automated protection both horizontally and vertically, stopping the entire storage system when an external body is detected. The Master and Slave logic eliminates


the possibility of beam intersections between emitters and receivers, ensuring high safety standards for both operators and goods. The EOS2 is a compact safety


light curtain range with competitive performance and innovative features. It offers versions with integrated safety functions such as self-monitoring static outputs, control of external contactors (EDM) and selectable automatic or manual restart.


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