12 Rockwell Automation Publication 450L-UM001D-EN-P - December 2019
Chapter 1 Product Overview
What makes each GuardShield light curtain system unique from other safety
light curtain transmitter and receiver solutions is that it consists of two identical
transceiver sticks. These safety light curtains are not designated as transmitter or
receiver right out-of-the-box. The configuration of a stick as a transmitter or a
receiver is done by inserting either:
• A dedicated transmitter or receiver plug-in into the transceiver sticks
• A universal plug-in module in each transceiver stick, which allows a
selection for the transmitter or the receiver function by wiring.
The GuardShield safety light curtains are designed as a two box system, which
has no inactive sensing area or dead/blind zones at the top and bottom of each
stick. This design allows a perfect and easy integration in individual machine
designs.
Selectable function depends on the installed receiver plug-in, which can be
inserted in a GuardShield safety light curtain transceiver stick. Different
operation modes can be selected via the DIP switch on the receiver plug-ins.
Depending on the type of plug-in that is installed in a GuardShield stick, the
system offers:
• Connectivity to ArmorBlock® Guard I/O™ (5-pin M12 QD) for network
connectivity providing CIP Safety™ over DeviceNet™ or EtherNet/IP™.
•Auto or manual start modes
• External device monitoring (EDM)
•Beam coding
• Muting, blanking, and cascading capabilities (only for the 450L-E safety
light curtain)
Recognized technical regulations and ISO 9001 quality assurance procedures are
carefully applied during the development and production of Allen-Bradley®
GuardShield products.
LASER LIGHT CLASS 2 HAZARD: Do not stare into the beam. The 450L-E light
curtains are equipped with an integrated laser alignment help option (see Laser
Alignment on page 24).
IMPORTANT 450L-B transceiver stick cannot be operated with a 450L-E transceiver stick
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