Rockwell Automation 442L SafeZone Singlezone & Multizone Safety Laser Scanner - Manual (Page 29)

R
SafeZone™ Safety Laser Scanner User Manual
10000073050, July 2011 27
Original instructions
4.4.4 Methods of preventing unprotected areas
When the SafeZone safety laser scanner is mounted on a plane surface,
there are areas in front of the mounting surface that are not covered by
the safety laser scanner.
Figure 36: Unprotected areas for mobile applications
These unprotected areas Πbecome larger if you mount the SafeZone
safety laser scanner using mounting kits.
Table 11: Unprotected areas
Fitting in the vehicle trim
Build the SafeZone safety laser scanner into the vehicle trim such that the
unprotected areas are
≤ 70 mm and the SafeZone safety laser scanner
projects a maximum of 109 mm beyond the front of the vehicle. The
vehicle may then be accelerated to a velocity of 0.3 m/s within a second.
Figure 37: Fitting the SafeZone safety laser scanner in the vehicle trim
Additionally, protect the area near to the scanner (5 cm wide area in front
of the front screen) using a proximity switch with 5 cm acquisition range.
Otherwise make the area near the scanner impassable with a bar or a
recess. The vehicle may then be accelerated as required.
4.5 Timing for monitoring case switching
If you switch between several monitoring cases, along with the safety
distance to the dangerous state there is a further safety-relevant aspect that
you must address.
If you can switch within 10 or 20 ms, the chosen protective safety field is
available within the response time of the SafeZone safety laser scanner. For
this reason you can initiate the switching at the time at which you actually
want to switch from one monitoring case to the other.
However, you must advance the timing of the switching if you
• Have entered an input delay for your switching method (see “Input
delay” on page 17).
• Control external OSSDs instead of the internal OSSDs The
following diagram shows the relationships:
Mounting Method Size of the Unprotected Areas
Direct mounting 109 mm
With mounting kit 1 112 mm
With mounting kit 1 and 2 127 mm
With mounting kit 1, 2 and 3 142 mm
ATTENTION Secure the unprotected areas.
If a vehicle is accelerated to a maximum
velocity of 0.3 m/s in less than three
seconds when in operation, you must
prevent personnel from entering the
unprotected areas by means of
mechanical trim panels, switch strips or
fitting the SafeZone safety laser scanner
in the vehicle trim panels.
IMPORTANT Note that the system must be fitted e.g.
in a trim panel without impairing the
optical beam path. The attachment of
an additional front screen is thus not
permitted. Any slot for the field of view
must be adequately sized (see Fig. 69 in
Section 11.5 “Dimensional drawings” on
page 50).
Recommendation If, when observing all necessary safety
precautions, you are able to avoid the use of
a restart interlock, you will increase the
availability of your vehicle.