Panasonic SF4D Series Instruction Manual page 22

Protection Area
[For use in the USA (per ANSI/RIA 15.06)]
● Equation 2
D : Safety distance (mm)
S
Minimum required distance between the sensing area plane and the nearest dan-
gerous part of the machine
K: Intrusion speed {OSHA-recommended value is 63 (inch/sec.) [≈ 1,600 (mm/sec.)] }
When determining K, consider all possible factors including the physical ability of
operators.
T: Maximum response time (sec.) for dangerous operation of the machine to halt or for
dangerous operation in a machine cycle to be completed.
When determining T, consider all possible factors.
For details, refer to "ANSI B11.19".
D : Additional distance calculated from the minimum sensing object of the device (mm)
pf
SF4D-F□ : D
SF4D-H□ : D
SF4D-A□ : D
D
pf
d: Diameter of minimum sensing object 0.552 (inches) ≈ 14 (mm) SF4D-F□
<Reference>
● When the floating blanking function is used, the minimum sensing object becomes larger.
According to ANSI B11.19, D
● Calculated using 1 (inch) = 25.4 (mm).
22
D K × T + D
S =
= 23.8mm
pf
= 61.2mm
pf
= 129.2mm
pf
= 3.4 × (d − 0.275) (inches)
≈ 3.4 × (d − 7) (mm)
Diameter of minimum sensing object 0.985 (inches) ≈ 25 (mm) SF4D-H□
Diameter of minimum sensing object 1.772 (inches) ≈ 45 (mm) SF4D-A□
= 900mm (3ft) when d > 63.5mm (2.5 inches).
pf
pf
© Panasonic Industrial Devices SUNX Co., Ltd. 2017