3 Product Overview
EZ-SCREEN LS Safety Light Screen shown without and with the optional EZLSA-K30LGR EZ-LIGHT
Banner EZ-SCREEN LS is a two-piece (emitter and receiver), redundant, microprocessor-controlled, opposed-mode
optoelectronic "light curtain" or "safety light screen". Models are available in 14 mm, 23 mm, or 40 mm resolution. Up to
four pairs of SLLC.. model emitters and receivers can be cascaded together.
Emitters have a row of synchronized modulated infrared (invisible) light-emitting diodes (LEDs) in a robust, compact metal
housing. Receivers have a corresponding row of synchronized photodetectors. The sensing field created by the emitter and
receiver is called the "defined area"; its width and height are determined by the length of the sensor pair and the distance
between them. The sensing range spans from 100 mm to 12 m (4 in to 39 ft), which decreases if corner mirrors or lens
shields are used.
The length of the sensor pair (housing) is dependent on the model, with lengths available from 280 mm to 1820 mm (11 in to
71.6 in). The end to end sensing design of the EZ-SCREEN LS, also known as "no blind zone" and "no dead zone," allows
mounting with minimal or no gaps in detection when using EZLSA-MBK-12 center-mount or EZLSA-MBK-16 side-mount
brackets.
The EZ-SCREEN LS models have trip output (auto power-up and automatic reset). In typical operation, if any part of an
operator's body (or any opaque object) of more than a pre-determined cross section is detected, the solid-state output
signal switching device (OSSD) safety outputs turn Off. These safety outputs are connected to the guarded machine's final
switching devices (FSDs) that control the machine primary control elements (MPCEs), which immediately stop the motion of
the guarded machine. When the defined area becomes clear, the OSSD outputs are allowed to turn ON.
EZ-SCREEN LS sensors are extensively FMEA (Failure Mode and Effects Analysis) tested to establish an extremely high
degree of confidence that when properly installed, no system component (even if it should ever fail) can cause a failure to
danger. Because of the dual scan technology, EZ-SCREEN LS sensors are also highly immune to EMI, RFI, ambient light,
weld flash, and strobe light.
Eight-conductor EZ-SCREEN LS systems (receivers with 8-pin pigtail QD or flying leads) do not require an external
controller when using the external device monitoring (EDM) function. This function ensures the fault detection capability
required by U.S. Control Reliability and ISO 13849-1 Categories 3 or 4 and PL d or e for controlling final switching devices
(FSDs) or Machine Primary Control Elements (MPCEs).
When configured with a five-conductor hookup, the EZ-SCREEN LS requires a self-checking safety module, safety
controller, or safety PLC/PES that conforms to the level of performance required by the risk assessment. Examples include
the UM-FA-9A/-11A safety module, SC22-3/-3E or XS/SC26-2 safety controller for applications requiring Control Reliability
and/or ISO 13849-1 Categories 3 or 4 and PL d or e.
EZ-SCREEN
®
LS Safety Light Screen
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www.bannerengineering.com - Tel: +1.763.544.3164
