Omron MS4800E Operation Manual page 44

Safety distance for safeguarding danger points
9-1-1 Calculation example for systems with a resolution of <40 mm
26
Formula according to EN999:
Where S = minimum distance in millimeters from the danger zone to the
detection point, line, plane or zone. If the result of the calcula-
tion is less than 100 mm, a distance of at least 100 mm must
still be maintained.
K = Approach speed in mm/s. In the close area of 500 mm, the
speed is calculated at 2000 mm/s. If the distance is greater
than 500 mm, K can be calculated as 1600 mm/s. In this
case, however, a minimum of 500 mm applies for the safety
distance.
T = the overall system stopping performance in seconds
T = t + t
1
t =
1
t =
2
t =
3
Please refer to the technical information of the safety
Interface and the machine for the response time and stopping
time details.
C = 8 x (d-14 mm), but not less than zero.
d =
S = (2000 mm/s x T) + 8 x (d-14 mm)
This formula applies for all minimum distances of S up to and
including 500 mm. The minimum value of S shall not be less
than 100 mm.
If S is found to be greater than 500 mm using the formula
above, then the formula below can be used. In this case the
minimum value of S shall not be less than 500 mm.
S = (1600 mm/s x T) + 8 x (d-14 mm)
S = (K x T) + C
+ t
2 3
response time of the safety light curtain in seconds,
given in the table in chapter 16.
response time of the safety interface t
maximum stopping time of the machine t
seconds.
minimum object resolution of the MS4800 system in
millimeters, therefore:
Section 9-1
, if any.
si
in
m