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

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10
When devices with > 40 mm resolution are used, the height of the top beam has
to be ≥ 900 mm (H2) from
machine supporting base while the height of the bottom beam has to be ≤ 300 mm (H1).
If the safety light curtain must be mounted in a horizontal position (Figure 6), the distance between the
dangerous area and the most distant optical beam must be equal to the value calculated using the following
formula:
S = 1600 mm/s (t
1
+ t
2
) + 1200
– 0.4 H
Where:
S = Minimum safety distance in mm.
t
1
= Response time of the ESPE in seconds (see section 11
– “TECHNICAL DATA”)
t
2
= Machine stopping time in seconds.
H = Beam height from ground. This height must always be less than 1000 mm.
Figure 6
Practical examples
Let's suppose to have a light curtain with height = 500 mm
To calculate the distance of the device from the ESPE, in a vertical position, the following formula is used:
S = K*T + C
Where:
T = t
1
+ t
2
t
1
= ESPE response time + SE-SR2 relay release time (max 80 ms)
t
2
= Machine total stopping time (e.g. 300 ms).
C = 8 (d -14) for devices with resolution
≤
40mm
C = 850 mm for devices with resolution
>
40mm
d = resolution
In all cases, if K = 2000mm/sec then S > 500 mm. Distance will have then to be recalculated using K = 1600
mm/sec.
SGx-RB2 SGx-RB4
T [sec] 0.391 0.392
C [mm] 850 850
S [mm] 1475.6 1477.2
x = ESPE Type: 2, 4
The reference standard is
EN ISO 13855 “Machine safety - the positioning of the
protective device based on the approaching speed of the human body”
. The
following information is to be considered as indicative and concise. For correct safety
distance please refer to complete standard EN ISO 13855.