Panasonic SF4C Series Instruction Manual page 14

Protection Area
[For use in Europe (EU) (as EN 999)] (Also applicable to ISO 13855 / JIS B 9715)
(For intrusion direction perpendicular to the sensing area)
<In case that the minimum sensing object is ø40mm or less>
● Equation 1
S : Safety distance (mm)
Minimum required distance between the sensing area surface and the dangerous parts of the
machine
K : Intrusion velocity of operator's body or object (mm/sec.)
Taken as 2,000 (mm/sec.) for calculation.
T : Response time of total equipment (sec.)
T = T
m
T : Maximum halting time of machine (sec.)
m
T : Response time of this device (sec.)
SF4C
C : Additional distance calculated from the size of the minimum sensing object of the device (mm)
However, the value of C cannot be under 0.
C = 8 × (d - 14)
d: Minimum sensing object diameter (mm)
<Reference>
● For calculating the safety distance S, there are the following five cases.
First, calculate by substituting the value K = 2,000 (mm/sec.) in the equation above. Then, classify the obtained value
of S into three cases, 1) S < 100, 2) 100 ≤ S ≤ 500, and 3) S > 500. For Case 3) S > 500, recalculate by substituting
the value K = 1,600 (mm/sec.). After that, classify the calculation result into two cases, 4) S ≤ 500 and 5) S > 500.
For details, refer to "Calculation example 1 For use in Europe."
● When this device is used in the "PSDI mode," an appropriate safety distance S must be calculated.
For details, be sure to refer to the standards or regulations applicable in each region or country.
<In case that the minimum sensing object is over ø40mm>
● Equation 1
S : Safety distance (mm)
Minimum required distance between the sensing area surface and the dangerous parts of the
machine
K : Intrusion velocity of operator's body or object (mm/sec.)
Taken as 1,600 (mm/sec.) for calculation.
T : Response time of total equipment (sec.)
T = T
m
T : Maximum halting time of machine (sec.)
m
T : Response time of this device (sec.)
SF4C
C : Additional distance calculated from the size of the minimum sensing object of the device (mm)
C = 850 (mm)
14
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S = K × T + C
+ T
SF4C
S = K × T + C
+ T
SF4C
© Panasonic Industrial Devices SUNX Co., Ltd. 2016