NCN3-F31K-N4

General specifications Switching element function DC Dual NC Rated operating distance 3 mm Installation flush mountable Output polarity NAMUR Assured operating distance 0 ... 2.4 mm Reduction factor r Al 0.35 Reduction factor r Cu 0.3 Reduction factor r 304 0.75 Reduction factor r St37 1 Reduction factor r Brass 0.45 Nominal ratings Nominal voltage 8 V Switching frequency 0 ... 3 kHz Hysteresis typ. 5 % Reverse polarity protection reverse polarity protected Short-circuit protection yes Suitable for 2:1 technology yes , Reverse polarity protection diode not required Current consumption Measuring plate not detected greater or equal 3 mA Measuring plate detected less than or equal to 1 mA Switching state indicator LED, yellow Compliance with standards and directives Standard conformity NAMUR EN 60947-5-6:2000 IEC 60947-5-6:1999 Electromagnetic compatibility NE 21:2007 Approvals and certificates UL approval cULus Listed, General Purpose CSA approval cCSAus Listed, General Purpose CCC approval CCC approval / marking not required for products rated less than or equal to 36 V Ambient conditions Ambient temperature -25 ... 100 °C (-13 ... 212 °F) Storage temperature -40 ... 100 °C (-40 ... 212 °F) Mechanical specifications Connection (system side) Cage tension spring terminals Core cross-section (system side) Flexible: 0.2 ... 1.5 mm 2 rigid: 0.2 ... 2.5 mm 2 Housing material PBT Sensing face PBT Degree of protection IP67 Tightening torque, housing screws 1 Nm Tightening torque, cable gland M20 x 1.5 - max. 7 Nm ATEX 1G Specific conditions Lead insertion The connection cables should either be fixed when laid and mechanically protected or installed in such a way, that a force of 30 N applied in the direction of the cable inlet for one hour, does not lead to any visible displacement of the cable connections, even though the cable sheathing is displaced, see also IEC 60079-11. Depending on the type of installation, a suitable cable in accordance with Type A oder B of IEC 60079-14, must be used. ATEX 2G Specific conditions Lead insertion The connection cables should either be fixed when laid and mechanically protected or installed in such a way, that a force of 30 N applied in the direction of the cable inlet for one hour, does not lead to any visible displacement of the cable connections, even though the cable sheathing is displaced, see also IEC 60079-11. Depending on the type of installation, a suitable cable in accordance with Type A oder B of IEC 60079-14, must be used. General information Use in the hazardous area see instruction manuals Category 1G- 2G- 3G