Schmersal Ibérica, S.L. - Relays and safety switches

The switches by traction of wire of Schmersal ZQ 900 and TQ 900 can employ like devices of universal control for multiple industrial applications, from functions of hygiene in stravel transportadoras of a maximum of 50 metres until machinery and plants of big extension and complexity, as for example in the industry maderera and of transformation of raw materials.

These switches offer a lot of additional functions, as well as a relation quality - attractor trucks price. They exist two basic versions. The ZQ 900 employs like switch of unemployment of emergency, and fulfils the norm IN 418 concerning this type of devices. To the accionarlo, the switch remains blocked in the position of unemployment of emergency. The rearm realises with a button of unblock. The TQ 900, by his part, presents contacts without blockade and is indicated for applications of unrelated mechanical engineering with the hygiene.

Both series can instrument with a maximum of four contacts and incorporate detection of split of wire: if this breaks , the switch commutates of autonomous form to the position ‘off'. The robust carcasa of zinc, with protection of class IP 65, allows to employ these switches in conditions desfavorables. The compact size and the three entrances of wire M20 allow a comfortable installation and connection of the switches of traction by wire, independently of the place where fix . The finder of glass facilitates the comprobación of the suitable tension of the wire.

The situation of the button of rearm of the ZQ 900 makes possible to control the activation of the function of hygiene to distances still greater. Optionally, the ZQ 900 can instrument with a switch of unemployment of additional emergency (to activate the function of unemployment of emergency from the station of work) and a luminous indicator.

It presents besides an innovative characteristic that facilitates considerably the installation of the switch by traction of wire: the device tensor S 900, that substitutes to the tensors of conventional wire. The user enters an extreme of the wire in the device and blocks it with a screw. Later, the wire can tighten with a hexagonal screw that allows a margin of 12 cm without that the wire twist . This comfortable system can employ in one or in both extremes of the wire.