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Range of application
Position switches are used where moving parts of machines and industrial plants have to be positioned, controlled and monitored.
The safety position switches are suitable for sliding and hinged safety guards, which need to be closed to ensure the necessary operational security. In combination with guard door monitors, all switches shown in this chapter achieve PL "e" per EN ISO 13849-1 or up to SIL 3 per EN 62061, subject to suitable circuit arrangements.
Design and operating principle
Many of the position switches fulfil the requirements of the IEC/EN 60947-5-1 standard and can therefore also be used as position switches with safety function. On the safety position switches, the guard device and the positive break NC contact are positively linked. When the guard device is closed, the position switch is not actuated. On sliding guards one switch is actuated and one switch is not actuated so that there is a change when opening and closing the guard door. These products are identified by the symbol for positive break.
Some position switches fulfil the requirements for standardised switches to EN 50 047 or EN 50 041.
The position switches are available with snap and slow action and are available with different contact configurations. A wide range of actuators completes the program. Most of the switches can be supplied with a metal roller on request.
The position switches shown in this chapter bear the CE mark according to the Low Voltage Directive 2014/35/EU.
All position switches with safety function bear the CE mark according to the Machinery Directive 2006/42/EC.