Omron F3SN-B P Series, Инструкция по эксплуатации

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Section 2 Wiring and Mounting
B-8
Beam centre-line
Safety distance
Detection zone
Intrusion direction
Hazardous part
2-1-2 Safety Distance
WARNING
Always maintain a safe distance (S) between the F3SN-B and a hazardous part of a machine.
Serious injury may result if the machine does not stop before someone reaches the hazardous part.
The "Safety distance" is the minimum distance that must be maintained between the F3SN-B and a
hazardous part of a machine in order to stop the machine before someone or something reaches it. The
safety distance is calculated based on the following equation when a person moves perpendicular to the
detection zone of a light curtain.
Safety distance (S) = Intrusion speed into the detection zone (K) x Total response time for the machine and
light curtain (T) + Additional distance calculated based on the detection capability of
the light curtain (C) ... (1)
The safety distance varies with national standards and individual machine standards. Be sure to refer to
related standards.
The equation is also different if the direction of intrusion is not perpendicular to the detection zone of the light
curtain.
<Reference> Method for calculating safety distance as provided by European Norm EN999 (for
intrusion perpendicular to the detection zone)
[Detection capability: 40mm or less]
Substitute K = 2,000 mm/s and C = 8 (d - 14 mm) in equation
(1) and calculate as shown below.
S = 2,000 mm/s x (Tm + Ts) + 8 (d - 14 mm) ...(2)
Where: S = Safety distance (mm)
Tm = Machine response time (s) *1
Ts = Light curtain response time (s) *2
d = Detection capability of the light curtain (mm)
e.g.:
Tm = 0.05s, Ts = 0.01s, d =25 mm:
S = 2,000 mm/s x (0.05s + 0.01s) + 8 (25 mm - 14 mm)
= 208 mm
Use S = 100 mm if the result of equation (2) is less than 100 mm.
Recalculate using the following equation with K = 1,600 mm/s if the result is over 500 mm.
S = 1,600 mm/s x (Tm + Ts) + 8 (d - 14 mm) ...(3)
Use S = 500 mm if the result from equation (3) is less than 500 mm.
[Detection capability: over 40mm]
Substitute K = 1,600 mm/s and C = 850 mm in equation (1) and calculate as shown below.
S = 1,600mm/s x (Tm + Ts) + 850 …(4)
Where :S = Safety distance (mm)
Tm = Machine response time (s) *1
Ts = Light curtain response time (s) *2
e.g.:
Tm = 0.05s, Ts = 0.01s:
S = 1,600mm/s x (0.05s + 0.01s) + 850mm
= 946mm
*1. The machine response time refers to the maximum time from the moment the machine receives a stop signal
to the moment the hazardous part of the machine stops. The machine response time should be measured on
actual machines. The machine response time should be measured and confirmed periodically.
*2. The light curtain response time refers to the time required for output to change from ON to OFF.