3.2.6 Dust Filtering
Set the Dust Filter Level according to different conditions specific to the application. In general, it is the sensitivity to various
levels of airborne particles that impact the response of the SX5 Safety Laser Scanner detection.
Set the Dust Filter Level to the lowest value that still allows the machinery to work without detecting dust.
• Use a LOW dust filter level (default in the configuration software) in cleaner environments where airborne particles
have little effect on object detection.
• Use a MID dust filter level in environments where some airborne particles are present and can influence object
detection.
• Use a HIGH dust filter level in dirty environments to filter (ignore) detection of airborne particles to ensure that they
do not cause the scanner to detect objects in the zone set when nothing is present. This makes the SX5 Safety
Laser Scanner less sensitive to dust and avoids shutting down the machinery unnecessarily.
The Dust Filter Level setting affects the additional distance that must be applied to the Minimum Safety Distance
Calculations (
Minimum Safety (Separation) Distance Formula
on page 30). In addition to the level of airborne particles in
the safety laser scanner's environment, some special lighting conditions also affect the detection sensitivity. These special
lighting conditions are:
• The presence of bright light within ±5° of the detection plane (see
• Highly reflective backgrounds within 3 m of the Safety Zone boundary (see
27).
WARNING: These special conditions require additional distance to be added to the Minimum Safety
Distance calculations to avoid a person or object arriving at the danger zone before the machine shuts
off. This distance also depends on the Dust Filter Level setting.
3.3 Positioning Horizontal Safety Zones for Stationary
Applications
Height of the Safety Zone Above the Floor or Walking Surface — The Safety Zone should not be located more than 1000
mm above the floor H.
Where H > 300 mm, there is a risk that a person can go undetected. In this case, supplemental guarding may be required.
The minimum allowable height of the Safety Zone (H) is a function of the scanner’s detection capability (resolution) and is
calculated using the following formula:
H = 15 × (d − 50 mm)
or
H = 15 × (d − 2 in)
where
d = the Scanner’s Detection Capability (Resolution)
H = the distance of the Safety Zone above the walking surface
Detection Capability (Resolution) (d)
Minimum Height (H)
≤ 50 mm (2 in)
0
70 mm (2.8 in)
300 mm (12 in)
90 mm (3.5 in)
600 mm (24 in)
117 mm (4.6 in)
1000 mm (39 in)
H should not be greater than 1000 mm (39 in)
This ensures detection of a given body part (e.g., thigh, leg, ankle) for a given resolution. For example, a Safety Zone with
70 mm resolution may not reliably detect an ankle (which requires a 50 mm resolution). Thus, the 70 mm resolution Safety
Zone is intended to reliably detect a leg and should be mounted 300 mm or more above the walking surface.
For a given Safety Zone height, the corresponding maximum detection capability (resolution) d can be calculated using the
following formula:
d = (H/15) + 50 mm
or
d = (H/15) + 2 in
SX5 Safety Laser Scanner
28
www.bannerengineering.com - Tel: +1.763.544.3164
