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Specifications
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Application information SIGUARD laser scanners are optical, electro-sensitive protective systems. Conditions relating to thei

Specifications
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Content	Application information SIGUARD laser scanners are optical, electro-sensitive protective systems. Conditions relating to their correct use must be carefully observed when using these devices. Some of the most essential issues are listed below: General information: •SIGUARD LS4-4 laser scanners should be mounted so that the-protective field completely covers the access to the dangerous area to bemonitored. •The scanner mounting position must be protected against moisture, dirt, as well as temperatures below 0°C or above 50°C. •The mounting location should be selected so that the danger of mechanical damage is minimized. Additional protective covers or bars must be provided at exposed loca- tions. •Protective covers, panels, mounting niches and other machine-related elements may not have a negative impact on the scanner field. •If areas are located in the scanner field of operation that cannot be scanned - as a result of permanent obstructions, that were defined as protective field limit, then these should be secured (e.g. using protec- tive gates), so that persons in these areas that cannot be detected, can- not suddenly enter the protective field. When carrying-outa hazardous analysis of the machine or plant, this point must be carefully taken into account. •Retro-reflectors or very bright sur- faces, such as certain metals or ceramics, close to the protective field and at the scanner level height should be avoided as these can cause measuring faults and errors. •In order to secure a consistent detection height at every point in the-protective field, the scanner – and therefore the beam level should be mounted parallel to the reference plane. •If the “restart inhibit” function is activated, the restart button must be located outside the protective field at a location where the com- plete hazardous area is clearly visibleand can be seen. Information regarding protective field changeover: In order to achieve optimum machine utilization, often, alternating loading/ machining cycles are implemented that results in changing hazardous areas. Also driverless transport vehicles, from their very nature, include various haz- ardous zones. If it can be expected that persons enter these areas, then it is absolutely necessary to provide an appropriate safety system. Our SIGUARD LS4 laser scanner fulfills many require- ments regarding securing the widest range of applications thanks to its four freely-configurable protective and alarm fields that can be changed over (field pairs). The user-friendly “LS4soft” operator program can be used to define the necessary field pair contours. The field pairs are activated by con- necting 24 V at the appropriate inputs. 8Safety Integrated System Manual 6 – Fail-safe optical sensors
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