Photoelectric safety switches

July 2008 Operator Interfaces, Switches & Relays

The new L2000 and L4000 single-beam photoelectric safety switches from SICK offer Category 2 or 4 safety according to EN 61496, and direct connection to safe controllers.

Applications involving safety-oriented monitoring of smaller machines and plant, eg, in packaging technology or handling and warehousing systems, can be efficiently implemented with these sensor systems.

Differing designs, housing materials and ranges, as well as an enclosure rating of IP67 and sub-zero operating capability open up numerous areas of use for the two series, and ensure modern machine integration in every respect.

With the new L41 series, the L4000 family of sensors now has a testable photoelectric switch in either an M18 or M30 cylindrical housing and with ranges of up to 60 m. The devices no longer require a separate evaluation unit and can be connected directly to safety controllers, for example - the Flexi Classic safe compact controller and the safety controllers of the UE4400 product family. Cyclical system testing is integrated as standard, making sensor signals directly available for a variety of control-related logic and functionality, eg, AND/OR, muting and bypass.

In addition to the cylindrical L21 with a range of up to 60 m, the new L2000 series offers two versions in cubic housings and with a new yellow design – the L27 and L28. In combination with suitable safety modules such as the Flexi Classic or safety controllers of the UE4400 family, all L2000 sensors can be used in applications up to Safety Category 2.

For more information contact Jendamark Automation, +27 (0)41 391 4700, [email protected], www.sick.com

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