Safeguarded Space - ABB IRT 710 Product Manual

1 Safety

1.1.3 Safeguarded space

1.1.3 Safeguarded space
Light curtain to protect hands from entering hazardous areas
d<40 mm
When the detection diameter of the light curtain sensor d<40 mm, this type of light
curtain can be used to protect the hands and fingers from entering the dangerous
area.
The calculation formula corresponding to the minimum safety distance is:
S = K*T+C
K = 2000 mm/s (Approaching speed of the hands)
T = The maximum time for the machine to stop + Light curtain response time
C = 8(d-14) (Traverse distance)
d = Light curtain detection capability
d>40 mm
When the detection diameter of the sensor d>40 mm, it cannot detect the intrusion
of the hand, but can only detect the body.
The calculation formula corresponding to the minimum safety distance is:
S = K*T+C
K = 2000 mm/s (Approaching speed of the walking human)
T = The maximum time for the machine to stop + Light curtain response time
C = 850 mm (Traverse distance)
d = Light curtain detection capability
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Note
If the recalculated value ≤ 500mm, then S should be set as 500 mm.
Note
The used light curtain should follow type 4 from IEC61496 standards.
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Product manual - IRT 710
3HKA00000186299-001 Revision: B