Omron OS32C Series User Manual page 112

Installation
•Reference Boundary Monitoring (RBM) must be applied when the OS32C is used for Entry Access
Protection guarding as specified in IEC61496-3:2008.
Refer to page 22 for more information on RBM.
•To ensure adequate detection a response time of 80 mS is required. If the response time exceeds
80mS, a 70 mm object with a speed of 1.6 m/s may not be detected under certain circumstances.
•Additional counter measures for protection must be provided if there is a space between the
protection zone and the machine hazard point.
Protective Field
Contour of the floor as reference
Fig. 4-10 Perpendicular Approach Installation
S = (K x T) + C
S = Minimum safety distance in mm measured from the danger area to the outer contour of the safety
zone.
K = Movement or approach speed in mm/s (constant K = 1600 mm/s)
T = Delay between interruption of the safety zone and standstill of the machine in seconds consisting
of the sum of t
t = Response time of the OS32C
1
t = Rundown time of the machine (mechanical rundown, reaction time of control system).
2
C = Additional supplemental distance in millimeters
 Example of safety distance calculation
K = 1600 mm/s approach speed constant
T = t + t = 0.58s Overall response time
1 2
t = 0.08 seconds OS32C response time (adjustable)
1
t = 0.5 seconds Max. time required to full stop of the machine
2
C = 850mm
S = K x T + C = 1600 x 0.58 + 850 = 1778 mm
OS32C
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User's Manual
and t
1 2.
S