IFM OY95 S Series Original Operating Instructions

IFM OY95 S Series Original Operating Instructions Manual pdf 10 page image

106.2 Calculation of the minimum safety distanceThere must be a minimum safe distance between the photoelectric safety sensorand the point of danger. This distance must be ensured so that the point of dangercannot be accessed before the hazardous state of the machine has been stopped.► Install the photoelectric safety sensor at a distancethat is greater than or equal to the minimum safetydistance (S) so that the hazardous area (A) canonly be accessed after complete standstill of thehazardous machine motion.According to the European Standard EN 999:2008 thefollowing formula is to be used to calculate the minimumsafety distance (S):S = K (t1 + t2) + CC = 8 (d - 14)A = hazardous areaH = protected area heightS = minimum safety distanceC = additional distanceS Minimum safety distance mmK Speed of approach of the object towards the hazardous area mm/st1 Total response time of the protective equipment, from release to switching off st2 Total response time of the machine, from the stop signal to switching off or topassing into the state defined as safesC Additional distance mmd Resolution (detection capacity) mmNon-compliance with the minimum safety distance may lead to restrictionsto or loss of the safety function.