"Application: Position switches with safety function are suitable for sliding and hinged safety guards which need to be closed to ensure the necessary operational security. In combination with safety monitoring modules all position switches class 1 shown in this chapter achieve Control Category 3 or 4 to EN 954-1. Further applications for positions switches class 1 are most varied positioning duties. The variety of requirements to be found in practice can be met in detail by means of a wide range of actuating elements. Design and mode of operation: On the position switches class 1 the guarding device and the positive break NC contact are positively linked. Enclosure rating of all the safety switches is IP 67. The safety switches can be fitted in any desired mounting position."