Positive-opening NC contacts provide a higher level of safety! 
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SCHMERSAL specializes in the design and manufacture of industrial switches, machine safety products, position sensors and related control accessories. You can also take a look at the Schmersal Product Overview. The Z/T235 Series limit switches are designed for use with movable machine guards/access gates which must be closed for operator safety … and for any other presence/position sensing application normally addressed with conventional limit switches. Their positive-opening NC contacts provide a higher level of safety and reliability than conventional spring-driven switches whose contacts can weld or stick shut. Each is available with a choice of six standard actuators … rounded plunger, roller plunger, roller rocking lever, rod rocking lever, adjustable roller rocking lever and one-way roller lever … mountable in any one of four 90° positions. All rocking levers are positively-locked to the shaft, and are adjustable throughout 360° in 10° increments. Units are available with a choice of slow-action or snap-action contacts. Their rugged metal housing and IP67 rating make them ideal alternatives to conventional limit switches. The Z/T235 Series may be used in any presence/position sensing application normally addressed with conventional limit switches. Models with positive-break NC contacts are approved for use in safety systems. For safety applications the switch must be mounted such that the actuating element of the machine displaces the switch actuator far enough to exceed the positive-break point. |
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