Posted to News on 16th Oct 2007, 00:00
Pull wire switches feature innovative wire-tensioning
Schmersal has introduced a range of pull-wire, e-stop switches and wire-tensioning devices for safety-oriented tasks ranging from conveyors to large and complex machinery and plant.
The new pull-wire switches are available in two basic versions - the ZQ 900 and ZT 900. The ZQ 900 is a safety emergency switch, similar to an emergency-stop switch, which fulfils the requirements of the new standard BS EN ISO 13850:2006 by latching in the emergency-stop position if actuated and requiring a manual reset by means of a release button.
The ZT 900 version has non-latching contacts and is suitable for non safety-related applications. Both include wire breakage detection that switches automatically to the 'OFF' position if the actuating wire breaks or is removed.
Schmersal has also launched the S 900 wire-tensioning device - an innovative and convenient feature for both ZQ and ZT ranges that facilitates the installation of both pull-wire switches. It can be used for either one or both ends of the actuating wire and replaces traditional clamps to increase or decrease the tension of the wire by up to 12cm without being twisted.
