DETERMINING THE SAFE DISTANCE
10
Fig.11
Fig.10
TX
TL=167
RED-RL
TL=167
RX
Test Piece to check the integrity
of the detection capability
WD = up to 6m
MERLINO elettronica s.a.s. di Meroni N.
Via Como, 33/A - 20851 Lissone - MB
E-mail: [email protected]
Web-site: www.merlinoelettronica.it
Pag. 10
DESIGN AND MANUFACTURE
OF ELECTRONIC EQUIPMENT
MERLINO elettronica s.a.s. di Meroni N.
Via Como, 33/A - 20851 Lissone - MB
E-mail: [email protected]
Web-site: www.merlinoelettronica.it
To ensure the device fulfils its accident prevention functions correctly, it must be installed at a
safe distance from the point actually dangerous for the operator of the machine in such a way as
to stop the dangerous movement before that point is actually reached.
The procedure for calculating this distance is established in the harmonised European standard
which gives a number of formulas using parameters dependent on various
factors discussed below (for more detail see the standard itself).
For information only, a number of examples to calculate the installation distance from the danger
point for vertically-installed light curtains with a detection capability of no more than 40 mm are
given below:
is the safe distance to be respected when installing the device
is a constant establishing the speed at which the operator approaches the danger point,
established at 2 meters per second
is the time in milliseconds deriving from the sum of the time t1 taken by the machine to stop
its dangerous movement after an ALT command and the time t2 taken by the light curtain to
open the OSSDs after an obstacle has been introduced into the protected area.
is the detection capability of the light curtain in millimetres
UNI EN13857,
-
-
(if S>500mm then reduce K=1,6 mt/sec)
-
-
S
K
T
d
where T = t1 + t2 while C = 8 x (d - 14)
S = K x T + C
All models of the "RED-RL" active optoelectronic at Laser emission are calibrated during fac-
tory testing according to the
specified by the customer in the last part of the
order code. Should it be necessary to modify this distance at a later date, you should contact
the manufacturer who will modify the calibration for the new working distance. Alternatively,
contact the factory telephonically for instructions on how to proceed.
working distance
REFERENCE CODE FOR ORDERING
SAFETY CATEGORY (
)
2 OR 4
WORKING DISTANCE
(mm)
HIGH RANGE
(HR)
RED
-RL /
/
MISU-RED-RL-UK-1.0
