Banner EZ-SCREEN Low-Profile Safety Light Curtain Systems - Manual (Page 35)

P/N 13348
33
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Overview
P/N 140044 rev. E 33
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
EZ-SCREEN LP
Instruction Manual Installation and Alignment
Optical Alignment Procedure with Mirrors
EZ-SCREEN LP sensors may be used with one or more corner
mirrors for guarding more than one side of an area. The models
MSM... and SSM-... rear-surface glass mirrors are rated at 85%
efficiency. Thus, excess gain and sensing range are reduced
when using mirrors; see Section 3.1.7.
In addition to the standard optical alignment procedure for these
applications (see Figures 3-15 and 3-16), also verify:
• That the emitter, receiver, and all mirrors are level and plumb,
• The middle of the defined area and the center point of the
mirrors are approximately the same distance from a common
reference point, such as the same height above a level floor.
Ensure that there are equal amounts of mirror surface above
and below the defined area such that the optical beams are not
passing below or above the mirror.
Figure 3-15. Corner mirror alignment
Figure 3-16. Optical alignment using the LAT-1
Model
Reduced
Resolution
Setting
Maximum Size
of Undetected
Objects
Resulting
Resolution
14 mm
Resolution OFF (Not applicable) 14 mm (0.55")
ON (2-beam) 16 mm (0.63") 34 mm (1.34")
25 mm
Resolution OFF (Not applicable) 25 mm (0.98")
ON (2-beam) 36 mm (1.42") 65 mm (2.56")
During any adjustments, allow only one individual to adjust only
one item at any one time.
NOTE: A LAT-1-LP Laser Alignment Tool is very helpful by
providing a visible red dot along the optical axis. See
Figure 3-16 and Banner Safety Applications Note SA104
(P/N 57477) for further information.
3.4.2 Reduced Resolution (Floating Blanking)
Reduced resolution allows objects of a certain maximum size
to interrupt the defined area without causing a Trip condition
(i.e., the OSSDs turn OFF). Use Reduced Resolution only
when necessary. In reduced resolution applications, the safety
(minimum) distance always increases due to the larger depth
penetration factor (Dpf). In either case, see Section 3.1.1 to
determine separation distance.
With 2-beam reduced resolution enabled, any two consecutive
beams (except for the sync beam), can be blocked without
causing a stop condition. Thus, multiple “holes” are created in
which 14 mm systems will detect a 34 mm object and ignore a
16 mm object. Similarily, 25 mm sensors will detect a 65 mm
object and ignore a 36 mm object. See Figure 4-1 for DIP-switch
configuration. During operation, the Status indicator flashes
Green when reduced resolution is enabled.
3.4.3 Fixed Blanking
Fixed blanking is available to, in effect, “disable” beams that
would otherwise be continually blocked by a stationary object.
One or multiple areas within an EZ-SCREEN LP sensor pair
may be “blanked out,” with a minimum of one beam between
two blanked areas. Any beam other than the sync beam may
be blanked. All beams of a fixed blanked area must remain
blocked during operation in order for the OSSDs to stay ON.
See Section 7.10 for instructions on remote fixed blanking
configuration and programming (cascadeable models only).
WARNING . . .
Use of Reduced Resolution
and Fixed Blanking
Use Reduced Resolution and Fixed Blanking only when
necessary. Any holes created in the defined area either must be
completely filled by the blanked object or the safety (minimum)
distance must be increased to account for the larger resolution (see
Section 3.1.1).
Component #4
(Receiver)
Component #1
(Emitter)
Component #2
(Mirror)
Component #3
(Mirror)