Datalogic SG4-RB2-050-OO-N, Instruction Manual

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SG BODY REFLECTOR MUTING
9
2.6.2 Minimum installation distance
As shown in Figure 5, the safety device must be positioned at a specific safety distance. This distance must
ensure that the dangerous area cannot be reached before the dangerous motion of the machine has been
stopped by the ESPE.
The safety distance depends on 4 factors, according to the
EN ISO 13855
“Safety of machinery - The
positioning of protective equipment in respect of approach speeds of parts of the human body”
Standard:
•
Response time of the ESPE (the time between the effective beam interruption and the opening of the
OSSD contacts).
•
Machine stopping time (the time between the effective opening of the contacts of the ESPE and the
real stop of the dangerous motion of the machine).
•
ESPE resolution.
•
Approaching speed of the object to be detected.
Figure 5
The following formula is used for the calculation of the safety distance:
S = K (t
1
+ t
2
) + C
Where:
S = Minimum safety distance in mm.
K = Speed of the object, limb or body approaching the dangerous area in mm/sec.
t
1
= Response time of the ESPE in seconds (see section 11
– “TECHNICAL DATA”)
t
2
= Machine stopping time in seconds.
d = Resolution of the system.
C = Additional distance based on the possibility to insert the body or one of body parts inside the
dangerous area before the protective device trips.
C = 8 (d -14) for devices with resolution
≤
40mm
C = 850 mm for devices with resolution
>
40mm
Note: K value is:
•
2000 mm/s if the calculated value of S is ≤ 500 mm
•
1600 mm/s if the calculated value of S is > 500 mm