Light Curtains Enhance Safety And Productivity


The Allen-Bradley GuardShield 450L safety light curtain system is a flexible, cost-effective solution that enhances safety while improving productivity through innovative transceiver technology. 

This next-generation light curtain system features a patented transceiver design that employs plug-in modules to establish each unit’s function as a transmitter or receiver. Once powered up, the transceiver learns its functionality from the plug-in module. 

Five-pin plug-ins are available for basic on/off functionality, while eight-pin plug-ins provide manual and auto restart with external device monitoring (EDM). To further simplify setup, advanced function settings are configured through dual in-line package (DIP) switches located on the plug-in module.

Ideal for hand and finger detection, and offered in a wide range of protective heights, the light curtain system is also fitted with an active protective field that senses the entire length of the transceiver. This feature reduces the inactive sensing areas that generally appear at the top and bottom of other light curtains. 

The active sensing field and compact design allows customers to install the GuardShield 450L light curtain system inside a machine frame as opposed to outside or on the machine.



  • Includes patented technology that allows each transceiver to be used either as a transmitter or receiver via an innovative plug-in module
  • Features an active protective field that senses over the entire length of a transceiver
  • Offers a wide range of protection heights 150 to 1950 mm (5.9 to 76.7 in.) in increments of 150 mm (0.5 ft.)
  • Features a compact housing design 30 x 30 mm (1.18 x 1.18 in.)
  • Provides easy configuration of the start mode, external device monitoring (EDM), and scanning range by DIP switches on the plug-in modules
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