GuardShield Safe 4
Operation Manual
5.1.5. Distance to reflective surfaces
Reflective surfaces may cause reflections within
the transmitter and receiver aperture angle, i.e.
an interruption of the protective field would not be
recognized (
Figure 7
).
Figure 7: Distance to reflective surfaces
Should reflective surfaces arise, i.e. aluminium
container passing near the light curtain or if the
danger point itself is reflective, i.e. a steel blade, the
safety distance S
2
must be increased, such that no
reflective surface lies within the distance S
2
.
The increase of the safety distance is dependant of
the actual operation range R according to IEC 61496
and may be calculated as follows:
Safe4
S2 = 72 mm
for R < 3 m
S2 = R x 0.0219
for R ≥ 3 m
5.1.6. Multiple light curtain arrangement
When using several optoelectronic safety devices
in the same application, the systems should be
installed in such a way that they cannot interfere
with each other. Care must be taken that each
receiver only receives light from its own transmitter
(
Figure 8
).
Figure 8: Multiple light curtain arrangement
10
Receiver
Transmitter
Transmitter
Receiver
Transmitter
Receiver
Transmitter
Receiver
The safety light curtain has been thoroughly
tested against light interferences according to the
stringent requirements of IEC 61496. Nevertheless
any direct interference into the receiver with other
infrared sources like through beam photoelectric
sensors, laser scanner, transmitters etc. should be
avoided.
5.2. Mechanical installation
Be aware that a rigid, flat base, isolated against
shock and vibration should be selected to mount
the GuardShield Safe 4. This in combination with
the standard mounting brackets set will keep the
initial alignment during operation even in harsh
industrial environments.
5.2.1. Mounting brackets
The backside of the light curtain profile has
continuous grooves to attach the mounting
brackets at any position along the light curtain
housing (
Figure 18
).
Each system is delivered with four mounting
brackets.
Optional available mounting brackets (
Figure 9
):
•
Vertical mounting brackets for mounting the
light curtain in the vertical axis of the light
curtain. (± 4
o
adjustable)
•
POC and SICK FGS mounting profiles (not
adjustable
The mounting brackets contain all necessary
mounting parts and a separate instruction sheet
to help ensure that the parts are assembled
properly.
5.2.2. Intelligent Laser Alignment System ILAS
WARNING: Class 2 Laser
Do not expose your eyes to the
laser beam to prevent exposure to
dangerous radiation!
Turn
ILAS
off if not used!
To switch on ILAS
:
•
Touch the hand symbol
Operation
: Laser beam is blinking
To switch off ILAS
:
•
Touch the hand symbol again
•
Automatically after 5 minutes
dangerous point
reflective surface
E
R
optical axis
S
2
R
