Panasonic SF4D Series, Instruction Manual

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© Panasonic Industrial Devices SUNX Co., Ltd. 2017 21
<Calculation examples>
● Calculation example 1: For use in Europe
(OFF response time: 6ms or less, diameter of minimum sensing object: 25mm)
First, calculate with K = 2,000.
S = K × T + C
= K × (T
m
+ T
SF4D
) + 8 × (d − 14)
= 2,000 × (T
m
+ 0.006) + 8 × (25 − 14)
= 2,000 × T
m
+ 2,000×0.006 + 8 × 11
= 2,000 × T
m
+ 12 + 88
= 2,000 × T
m
+ 100
If the result is:
1) S < 100 (mm)
Take 100 (mm) as the safety distance S.
2) 100 ≤ S ≤ 500(mm)
Take 2,000 × T
m
+ 116 (mm) as the safety distance S.
3) S > 500(mm)
S = K’ × (T
m
+ T
SF4D
) + 8 × (d − 14)
= 1,600 × (T
m
+ 0.006) + 8 × (25 − 14)
= 1,600 × T
m
+ 1,600 × 0.006 + 8 × 11
= 1,600 × T
m
+ 9.6 + 88
= 1,600 × T
m
+ 97.6
Calculate again using the above.
If the result is:
4) S ≤ 500 (mm)
Use 500 (mm) as the safety distance S.
5) S > 500(mm)
Use 1,600 × T
m
+ 97.6 (mm) as the safety distance S.
If the device is installed in a system with a maximum machine halting time of 0.1 (sec.)
S = 2,000 × T
m
+ 100
= 2,000 × 0.1 + 100
= 300
This meets condition 2) above, and thus the safety distance is 300 (mm).
If the device is installed in a system with a maximum machine halting time of 0.4 (sec.)
S = 2,000 × T
m
+ 100
= 2,000 × 0.4 + 100
= 900
This meets condition 3) above, and thus
S = 1,600 × T
m
+ 97.6
= 1,600 × 0.4 + 97.6
= 737.6
This meets condition 5) above, and thus the safety distance is 737.6 (mm).