SGSM / SGSD for shaft copy with overspeed governor SGSM / SGSD incremental magnetic sensors are designed for simple and reliable shaft copy with overspeed governor and as a safety device to prevent unintentional movement of the elevator car. These incremental modular encoders basically consist of a compact sensing head fitted with a single (SGSM version) or double (SGSD redundant version) magnetoresistive sensor and a MRI/72 series magnetic ring. The magnetoresistive sensor and the miniaturized circuitry are fully integrated into a rugged and hermetically encapsulated housing while the robust magnetic ring is suitable for installation even in largesized shafts because of its 50 mm max. bore, 72 mm outer diameter. SGSM / SGSD are compact, have a low profile and even better are crescent-shaped; this allows them to fit into equipment with constrained and tight mounting space and guarantees unparalleled quickness and ease of installation. They have a high IP68 protection rate and are unaffected by dirt, debris, moisture, water jets, oil, grease, common chemical agents and the finest of dust particles and thus it is ideally suited to operate in aggressive environments. The non-contact magnetic technology also provides virtually wear & maintenance-free operation, eliminates interference from machine vibrations, delivers insulation protection against damages caused by eddy currents occurring on the shaft and prevents the mechanical loadings from being transmitted to the sensing system. They generate square wave output signals and additional complementary signals (AB, /AB) and is offered in standard industry Push-Pull (HTL) 10-30VDC or Line-Driver (TTL) 5VDC output circuits with a resolution up to 4096 information per revolution (cpr). SGSM / SGSD are also available in redundant version encompassing two separate sensors and independent circuitries, power supply and wiringin the same still compact housing. Download the elevator catalogue at issuu.com/lika_electronic Discover the full range of cutting edge solutions for each elevator application at Interlift 2013, Augsburg, Germany, 15 - 18 October, Hall 3 Booth 3105.
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