Leuze electronic MLC 520 - Calculation of safety distance SRO acc. to EN ISO 13855 when protective field is accessed from above

Mounting
Leuze electronic MLC 520 22
Calculation of safety distanceS
Ro
acc. to ENISO13855 when protective field is accessed from
above:
Calculation of safety distanceS
Ro
for point of operation guarding
S
RO
[mm] = Safety distance
K [mm/s] = Approach speed for point of operation guarding with approach reaction and normal approach di-
rection to the protective field (resolution 14to40mm): 2000mm/s or 1600mm/s, when
S
RO
>500mm
T [s] = Total time of the delay, sum from (t
a
+t
i
+t
m
)
t
a
[s] = Response time of the protective device
t
i
[s] = Response time of the safety relay
t
m
[s] = Stopping time of the machine
C
RO
[mm] = Additional distance in which a body part can move towards the protective device before the pro-
tective device triggers: value (see the following table “Reaching over the vertical protective field
of electro-sensitive protective equipment (excerpt from ENISO13855)”).
a
3
C
RO
KxT
b
1
2
S
RO
1 Safety sensor
2 Danger zone
3 Floor
a Height of the point of operation
b Height of the upper beam of the safety sensor
Fig.6.1: Additional distance to the safety distance when reaching over and under
Tab.6.1: Reaching over the vertical protective field of electro-sensitive protective equipment(excerpt from
ENISO13855)
Heighta of
the point of
operation
[mm]
Heightb of the upper edge of the protective field of the electro-sensitive protective
equipment
900 1000 1100 1200 1300 1400 1600 1800 2000 2200 2400 2600
Additional distanceC
RO
to the danger zone [mm]
2600 0 0 0 0 0 0 0 0 0 0 0 0
2500 400 400 350 300 300 300 300 300 250 150 100 0
2400 550 550 550 500 450 450 400 400 300 250 100 0
2200 800 750 750 700 650 650 600 550 400 250 0 0