Rockwell Automation 440L GuardShield Type 4 and Remote Teach User Manual - Manual (Page 14)

GuardShield™ Safety Light Curtain User Manual
12
R
Original instructions
Cycle power to assure that the system powers up and goes to the ON
state (alignment indicator is OFF).
The GuardShield is also offered with an integrated laser alignment
system which has a constantly powered Class 1, eye safe laser located
in the top of the GuardShield transmitter and in the bottom of the
GuardShield receiver. Each laser emits a low level of visible light.
Simply blocking this light below the finger symbol causes the light to
be reflected back to a photo sensor which changes the condition of the
laser light. If this light is at a low level, interrupting it will cause the
laser to emit a highly visible level of light. Interrupting the visible light
in the same location will cause the laser to switch to a low level of
emission. The emission of visible light will also change to a low level
after five minutes of activation.
Across from each laser is a target used to help with the alignment of
the GuardShield pair. Positioning the visible light in the center of the
top and bottom targets will position the GuardShield pair for optimal
alignment.
An external laser (440L-ALAT) and mounting bracket (440L­AF6109)
is offered as an accessory for aligning the GuardShield.
Alignment Procedure for GuardShield with
Integrated Laser Alignment
1. Properly locate the GuardShield pair from the point of operation
hazard after performing the safety distance calculation.
2. Using the GuardShield mounting brackets, mount the transmitter
and receiver so that they are facing one another and are positioned
in the same direction. A reference would be that the indicator
LEDs are opposite one another.
3. Turn on each laser by placing a finger or hand in front of each laser.
4. For optimal alignment, adjust the transmitter and receiver in such a
way that both visible laser beams hit the laser targets opposite each
laser. A small deviation around the target is allowable.
The GuardShield safety light curtain is suitable for most operating
environments (IP65 environmental rating). Proper safety distance as
well as adequate protective height must be observed.
Determine if the machinery, on which the GuardShield 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
The GuardShield must be mounted at the proper distance from the
point of operation hazard. This distance is referred to as the Safety
Distance.
The installation of the GuardShield safety light
curtain must be such that access to the hazard
is only possible through the sensing field of the
GuardShield. Auxiliary safe guarding may be
required in conjunction with the GuardShield to
meet this requirement.
IMPORTANT
Operators cannot reach hazardous
machine parts without passing through
the protective field.
Operators must not step between
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 protective
field and hazardous machine parts.