Safety sensors

Application Design and operating principle
Safety sensors are suitable for the safeguarding of sliding,hingedor removable protective doors thatneed to be closed to secure the re-quired operators’safety.They are also applicable on profile sectionsand for retrofitting on existing equipment.All presented safety sensors achieve,in combination with an ap-propriate safety relay module,Control Category 3 or 4 to EN 954-1.Safety sensors are preferably applied as an alternative to mechani-cally operated limitswitches in cases where unfavourable operating conditions,such as high or low actuating speeds,large switching fre- quencies,extreme dirtor dustproduction,high humidity,chemical at- mospheres,highly fluctuating actuating distances,etc.occur.Even inthe presence of aggressive materials,as well as in the food processingindustry,safe switching is ensured through encapsulation of the con- tacts. The safety sensors are actuated by a coded actuator withoutanymechanical contact.The devices can be selected with one NC and oneNO contactor with two NC contacts.All described safety sensors have a wiring compartment. The BZ 16 safety sensor is used in safety circuits for position moni-toring of movable safety guards in accordance with EN 1088 andIEC/EN 60947-5-3.The entire system,consisting of the BZ 16 safetysensor (with integrated evaluation) and the BZ 16-B1 actuator,meets the requirements of the IEC/EN 60947-5-3 standard.The safety sen- sors are classified in level PDF-S to IEC/EN 60947-5-3.The safety sensors achieve Control Category 3 or 4 to EN 954-1only in combination with a safety relay module series SRM.Technicaldetails regarding this safety relay module can be found in the »Mag- netic safety sensors« chapter.All safety sensors described in this chapter bear the CE mark ac-cording to the Machinery Directive 98/37/EC. 1111 On sliding doorsApplicationOn hinged doors On removable doors