Calculating the minimum safety distance S according to

Calculating the minimum safety distance S according to EN 999 Making a danger point safe Access guarding Safeguarding an area Perimeter guarding

Calculating the minimum safety distance S according to EN 999 S=?

Calculating the minimum safety distance S according to EN 999 General formula: S=Kx. T+C S S = Minimum safety distance in mm K = Approaching speed in mm/ms T = Time between interrupting the sensing field and machine standstill in ms C = Additional distance depending on resolution in mm

Calculating the minimum safety distance S according to EN 999 Measures against over reaching Measures against reaching from the side Measures may be either screwed on mechanical parts or electrically locked doors. S The sensing field of the AOPD must be the only access to the danger point Measures against reaching from back Measures against under reaching

Calculating the minimum safety distance S according to EN 999 Formula for AOPDs up to 40 mm resolution and perpendicular approach to the sensing field: t 1 S t 3 t 2 S = (K x T) + C S = Minimum safety distance in mm K = 2 mm/ms approaching speed T = t 1 + t 2 + t 3 in ms t 1: response time of the AOPD t 2: response time of the safety interface t 3: stopping performance of the machine C = 8 x (d - 14) in mm d = resolution of the AOPD (range 14 to 40 mm) S [mm] = (2 [mm/ms] x (t 1+t 2+t 3) [ms]) + 8 (d - 14) [mm] If the result is lower than 100 mm, a minimum distance of 100 mm must be maintained. If the result is higher than 500 mm, K can be reduced to 1. 6 mm/ms. In this case 500 mm is the minimum.

Calculating the minimum safety distance S for example S [mm] = 2 [mm/ms] x (t 1+t 2+t 3) [ms] + 8 (d - 14) [mm] Looking at C: C = 8 x (d-14) : d 14 30 40 C 0 128 208 y = mx + b y = 8 d – 112 y = “slope of your finger”

Principle of a Stopping-Performance Measurement Device precision potentiometer point of stopping command Uref SLOWING-DOWN PATH moving part path hold 250 mm output start STOPPING TIME stop logic unit 85 ms MAXIMUM SPEED fixed part standstill recognition 19. 99 tachometer Sensor Evaluation Unit m/s

Resolution of an AOPD Resolution d = pitch p + lens diameter Ø d=p+Ø Channel Ø p

Resolution of an AOPD Resolution d = pitch p + lens diameter Ø d=p+Ø Channel Ø p d<p+Ø

Resolution of an AOPD Resolution d = pitch p + lens diameter Ø d=p+Ø Channel Ø p d>p+Ø d

Calculating the minimum safety distance S according to EN 999 Channel S Stepping behind protection using master and slave units (different resolutions possible). Note: Calculate both for vertical and horizontal

Calculating the minimum safety distance S according to EN 999 Direction of approach parallel to the sensing plane of the AOPD Relationship between height of the sensing plane above ground and resolution of the AOPD: H = 15 x (dmax - 50) [mm] d = resolution of the AOPD H = height of the AOPD above ground dmax = H/15 + 50 [mm] Minimum safety distance S: S=K x. T+C S K = 1. 6 mm/ms T = (t. AOPD + t. Interface + t. Machine) in ms d C = (1200 - 0. 4 H) in mm Channel H Note: @300 mm : 70 mm resolution, consider RS 4 -4 (< 850 mm) H < 1000 mm H < 300 mm is considered not to allow crawling underneath

Calculating the minimum safety distance S according to EN 999 Access and perimeter guarding with AOPD Formula for multiple beam AOPDs: S=Kx. T+C K = 1. 6 mm/ms approaching speed T = t. AOPD + t. Interface + t. Machine in ms C = 850 mm (arm length) 1100 mm 900 mm 700 mm 400 mm 300 mm

Calculating the minimum safety distance S according to EN 999 S=K x. T+C = K = T = Cmin = SFT = S Safety distance in mm 1. 6 mm/ms t. AOPDDR+t. Interface + t. Machine in ms 1200 - 0, 4 x H in mm 850 mm Depth of protection field Hmin = 15 x (d - 50) S SFT • NOTE: for mobile applications resolutions of 150 mm and less Thermal scanners also see dust dirt, hot and cold! H H = Heights of scanning plain d = Resolution of AOPDDR d = 70 mm Hmin = 300 mm Hmax = 1000 mm