End-to-End Safety Sensing
This rotary-fed assembly machine is surrounded on three sides
by hard guarding; the opening can be protected efficiently and
effectively with a low-profile light screen. For a traditional safety
light screen (or safety light curtain) to protect the entire opening,
the sensors typically must be mounted outside the machine frame. This
can cause snag and aesthetic issues with the sensors and cabling.
Mounting the sensors within the machine frame can solve these issues,
but can create other problems. For example, if a light screen with a
dead zone is mounted with a gap at the top and/or bottom of the sensing
field, the separation (safety) distance must be increased. If the larger
separation (safety) distance is not complied with, this dead zone can
lead to a hazardous situation.
The solution requires the sensor to mount snugly within a
machine opening, with continual end-to-end sensing that leaves no gaps.
This enables the light screen to be located a minimum distance from the
machine hazard point, using minimal floor space (which reduces the reach
for the operator), and eliminating snag and aesthetic issues.
At 28 mm x 26 mm (1.1" x 1"), Banner's EZ-SCREEN LP safety light screen
is incredibly compact and can mount in tight spaces. Its 14 or 25 mm
resolution (depending on model) extends from sensor end to end.
The EZ-SCREEN LP is the ideal solution to maximize ease of installation
and flexibility eliminating the need for additional hard guarding or
separation (safety) distance that minimizes floor space. The mounting
scheme includes brackets for end or side mounting with no "dead zone";
both bracket styles are included with each sensor. Additional mounting
options include a "Universal" adapter bracket for mounting to slotted
framing, a solution for mounting the sensor inside tubular framing, such
as P1000 Unistrut®, and fixed or pivoting angle brackets for quick and
easy installation of cascaded sensors.
Choice of housing color and low-profile design that fits the profile of
the machine frame provide pleasing aesthetics. Additionally, the
EZ-SCREEN LP has outstanding on-board alignment and diagnostic aids,
does not require an external device for programming, and can be enhanced
with the addition of Banner's EZ-LIGHT for remote status indication.
Click to view the EZ-Screen Safety Light Curtain specification sheet in *.pdf format