"The PSEN cs1.1p safety switch (stock no. 918-6689) is coded and switches with an actuator from the PSEN cs1.1 series. There is no restriction on the number of times the actuator can be used and reset. The PSEN cs2.13p safety switch (stock no. 619-2795) is fully coded and switches with an actuator from the PSEN cs2.1 series. These actuators must be taught. It can be taught up to a maximum of 8 times but only 1 actuator at a time is taught.Supply Voltage = 24 V dcHousing Material = PlasticConnection Type = M12Range = PSENcodeSwitching Distance = 15 mmIP Rating = IP67Actuator Included = YesWidth = 40mmHousing Colour = YellowSafety Category = 4"