Rockwell Automation 445L GuardShield Micro 400 Safety Light Curtain User Manual - Manual (Page 12)

R
GuardShield™ Micro 400 Safety Light Curtain User Manual
10
Original instructions
Figure 5: Minimum distance from reflecting surfaces
How to Determine the Minimum Distance from the Reflecting
Surfaces:
-> Determine the distance D [m] transmitter-receiver
-> Read the minimum distance a [mm] from the graph:
Figure 6: Graph, minimum distance from reflecting surfaces
The effective aperture angle for the GuardShield Micro 400
system is
± 2.5° at a mounting distance of > 3.0 m (9.8 ft). Calculate the
minimum distance to reflecting surfaces depending on the
distance between the transmitter and the receiver, using an
aperture angle of ± 2.5°, or take the appropriate value from the
following table:
Table 2: Table, minimum distance from reflecting surfaces
Formula: a = tan 2.5° x D [mm]
a = minimum distance to reflecting surfaces
D = distance between transmitter and receiver
Installation and Mounting
This section describes the installation of the GuardShield Micro
400 safety light curtain.
A rigid and flat base, isolated against shock and vibration should
be selected to mount the GuardShield Micro 400 light curtain.
This in combination with the standard mounting bracket set will
keep the initial alignment during operation even in harsh
industrial environments.
The GuardShield Micro 400 safety light curtain is suitable for most
benign operating environments (IP54). Proper safety distance as
well as adequate protective height must be observed. For the
installation height and safety distance, please refer to
“Determining the Safety Distance” section on page 8.
Determine if the machinery, on which the GuardShield Micro 400
is to be mounted, meets the requirements as specified in the
beginning of this manual, i.e., machinery must be able to be
stopped anywhere in its stroke or cycle, consistently and
repeatedly.
Correct Installation
Incorrect Installation
Distance Between Transmitter and Receiver
(Range D) [m (ft)]
Minimum Distance
a [mm (in.)]
0.2…3.0 m (0.65…9.8 ft) 135 (5.31)
4.0 m (13.1 ft) 175 (6.88)
5.0 m (16.4 ft) 220 (8.66)
Distance D (meters)
IMPORTANT
The installation of the GuardShield Micro 400
safety light curtain must be such that access to
the hazard is only possible through the sensing
field of the GuardShield. Auxiliary safeguarding
may be required in conjunction with the
GuardShield Micro 400 to meet this
requirement.
Operators cannot reach hazardous
machine parts without passing through
the protective field.
Operators must not step between the
protective field and hazardous machine
parts (by-pass prevention).
Operators can reach hazardous machine
parts without passing through the
protective field.
Operators can step between the
protective field and hazardous machine
parts.