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Safety switches for limited space applications

04 February 2009

New safety switches from Euchner feature compact, reinforced thermoplastic bodied designs, ideal for applications on very small machines. The TQ switch has a body size of 75mm square x 15mm thick. It incorporates five internal switching contacts with optional locking mechanisms of guards locked or released by spring force when used in conjunction with the internal energised solenoid. The switch incorporates a ‘status condition’ LED, and accommodates a vertical actuator approach and mechanical key release of guard locking with a three directional approach.

Where guard locking is not anticipated then the smaller NQ series safety switch can be used. This has a body size of 78 x 30 x 15 mm and three internal switching contacts are provided. Both horizontal and vertical actuator approach can be accommodated for maximum installation versatility.

Common actuators are used with both switch series, which include a single straight actuator with two optional right-angled actuators, one of which is incorporated with a mounting plate. The products are suitable for applications with a minimum door swing radius of 160mm, with locking forces of up to 500N being achieved. Operational approach speeds of actuator between 0.05 to 1 metre/sec can be accommodated, with actuation frequency of 900/hr for the TQ switch and 1200/hr for the NQ unit. A mechanical life of 1 x 106 operating cycles is anticipated, when operating within an ambient temperature range of -25°C to +70°C.

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