Wintriss Shadow VI, User Manual

Page: 22 / 159

1107200 Shadow VI User Manual
page 10 Chapter 1 Introduction to Shadow VI
Safety Light Curtain
Shadow VI Features and Options
Shadow is designed for uncompromising safety and durability under real world conditions.
The light curtain includes various features and options. Some of these are described next.
The floating window feature provides a means for the random bypass of only one beam of
the light curtain. It is useful in those applications where material must travel through or
within the sensing field in a random pattern. The floating window may only be used when
material or parts take up a space no greater than 1
1/8
" (2.9 cm) within the sensing field.
Larger material would block more than one light beam at a time which would generate a stop
command. This built-in feature is enabled by turning a switch "on" at the control. The
amber indicators at the receiver and on the front cover of the control flash when floating
window is "on". A floating window automatically alters the object sensitivity from 1
1/4
" to
2". If you plan to use this feature even occasionally, the safety distance for mounting must
be increased. Refer to "Calculating Safety Distance" in Chapter 2 of this manual.
Shadow has optional fixed blanking capability. External blanking windows (purchased
separately) allow you to disable up to 5 contiguous beams in an area where a fixture
penetrates the light field and permits stationery objects to protrude into Shadow's sensing
field. For example, in a situation where a conveyor or work table extends into this field,
moving the fixture may not be feasible. Therefore, you install a blanking window on the
Shadow receiver where the fixture penetrates the field. This disables the light beam that
would normally detect the fixture. However, if the light field is penetrated in any area above
or below the fixture (or "blanked" light beam), the light curtain will send a stop signal to the
machinery.
Floating window can be used in conjunction with fixed blanking. An example could be an
application where part of the tool physically protrudes into the light field and an air blow-off
is randomly ejecting parts. Floating window is covered in Chapters 2 and 3, and fixed
blanking is discussed in Chapter 3. Safety distance is also affected by fixed blanking
window if the fixed obstruction does not extend all the way from the transmitter to the
receiver. See Chapter 2 for a comprehensive discussion of safety distance.
Shadow has passed stringent environmental stress tests for shock, vibration, impact, exposure
to temperature extremes, dust, humidity, and electrical abnormalities.
Shadow comes with a built-in status relay which can be set to perform different functions
(setup is covered in Chapter 2). When wired to the main motor, the relay opens at power-up
if “reset on power up” has been enabled at the control (see "Making settings" in Chapter 2).
The status relay can be set to "mimic" stop outputs which can activate an alarm or beacon
whenever Shadow is in a "stop signal" (red) condition.
Shadow can also be used in perimeter guarding applications when there is a walk-in hazard
inside the guarded area. In this case, a "stop signal" condition is generated when any of the
light curtain beams has been obstructed. Shadow will not reset to "curtain clear" (green)
automatically even when the obstruction has been removed. You must reset the system to
resume operation. Activating this feature is discussed in Chapter 2.
Both Shadow optic heads include universal mounts. These mounts are used to properly align
the Shadow heads during installation. They can be rotated ±30° to make installation and