Door Industry Journal - Summer 2015

Also online at: www.dijonline.co.uk industrial doors NEW LIGHT CURTAIN FULFILS ALL SAFETY REQUIREMENTS The LIGI passed the EC type test conducted by TÜV Nord according to the following standards: C+D and E device without reservation and has been certified accordingly. Standard aperture The LIGI conforms to all the requirements of EN 12978, also including the maximum ±5° transmitter and receiver apertures. Enhanced requirements The TÜV testing organisation set out a hazard scenario which was to be safely detected by the light curtain. The door is stopped at a residual opening of slightly over 50mm. If the test body B (ø 50mm) then intrudes into the remaining protection field in that position, the light curtain must detect it as an obstacle. Moreover, the Automatic Door and Gate Systems Forum “EK TuT” which met on 29 October 2013 in Nuremberg set out a further safety proposal for light curtains acting as a safety device on door systems, namely that the standard range for detection of the test body B (ø 50mm) should be increased from 300mm above the ground to 500mm. The LIGI complies with these enhanced requirements. Intelligent functions - easy installation The specified ±5° safety aperture poses no problem when it comes to installing the LIGI. Mechanical adjuster clamps are provided for the purpose, together with a software programmable adjustment mode. In this Mode the strength of reception of the optical signal is indicated by changes in the flashing frequency of an LED. The best signal reception - meaning that the transmitter and receiver are perfectly aligned – is attained when the LED flashing frequency is the highest. At that point simply tighten the clamp and the adjustment procedure is complete. Maximum operational reliability The mechanical construction of the LIGI, an aluminium profile fully filled with epoxy resin and high-grade connector, is extremely robust in line with the tough environmental demands imposed on door systems. The LIGI is highly insensitive against ambient light even direct sunlight does not impair its functionality. The LIGI is also resistant to electromagnetic interference such as can occur in door drives that use low- frequency inverters. A high rate of variant diversity The rate of product variants is very high. Various combinations of protection field height, beam geometry, semiconductor output variants or the OSE output are available for direct connection to the closing- edge inputs of most door controllers. Retrofitting older door systems / Compliance with ASR A 1.7 The safety light curtain is ideal for upgrading or retrofitting door systems which cannot comply with the specified maximum closing forces. Special design for low doors For doors where the LIGI cannot be fully installed, such as in underground parking garages (monitoring also in the header area), variants with separated electronics are also available. Even if the height is less than 2500 mm, this enables the full height of the door to be monitored without any gaps in the protection field. Features of the LIGI light curtain 34 THE door industry journal summer 2015 • EN 12978 • EN ISO 13849, Cat. 2, PLd • IEC 61496-2 • EN 12445 Chap. 7 • EN 12453 Chap. 5.5.1 • EC type tested by TÜV Nord • Conforms to testing organisations’ safety recommendations • Can be installed directly in the door opening instead of plane of door movement • Adjustable mounting clamps, electronic alignment indicator for easy perfect alignment • Easy to service thanks to status and diagnostic indicators • Door widths up to 10m are easily implemented • Direct connection to almost all door controllers • High rate of variants, including for low door systems • High degree of protection IP67, fully filled with epoxy resin • Small housing dimensions of just 16x16mm