Calculation Example For The Us - Panasonic ST4 Instruction Manual

Before Using this Device
S
Hence, as per the calculations S is 1050mm.

2.3.2.2 Calculation Example for the US

The safety distance D
D = K × T + D
s
D
Safety distance (mm)
s:
Minimum required distance between the sensing area surface and the dangerous
parts of the machine
K:
Intrusion velocity of operator's body or object. The recommended value in OSHA is
63inch/s (≈ 1600mm/s).
ANSI/RIA 15.06 does not define the intrusion velocity "K." When determining K,
consider possible factors including the physical ability of the operators.
T:
Response time of total equipment (s). T = Ts + Tc + T
T is the worst stopping time of the machine/equipment
s
T is the worst stopping time of the control system
c
T is the response time of the safeguarding device (25ms)
ST4
D :
Additional distance calculated from the size of the minimum sensing object of the
pf
sensor (mm).
REFERENCE
Since the calculation is based on 1 inch = 25.4mm, there is a slight difference
between the representation in mm and that in inches. Refer to the relevant
standard for the details.
18
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= K x T + C
= 1600 × (T + T
m ST4
= 1600 × (0.1s + 0.025s) + 850
= 1600 × 0.1s + 1600 × 0.025 + 850
= 160 + 40 + 850
= 1050
is calculated in accordance with ANSI/RIA 15.06 with the equation:
s
pf
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CH - 5453 Busslingen
Panasonic ST4 Instruction Manual
) + 850
ST4
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