Rockwell Automation Publication 450L-UM001D-EN-P - December 2019 11
Chapter 1
Product Overview
General Description
The 450L GuardShield safety light curtain family consists of general-purpose
presence sensing devices that are designed for use on hazardous machinery for
Point of Operation Control (POC). The product family is certified as Type 4
electro-sensitive protective equipment (ESPE) (as defined by EN 61496-1 and
IEC 61496-2). This certification allows this product to be used in applications
that require PLe category 4 according to EN ISO 13849-1.
The 450L safety light curtains are offered in multiple lengths from
150…1950mm (5.9…76.77 in.) in increments of 150 mm (5.9 in.). Each length is
available in finger (14 mm [0.56 in.]) or hand (30 mm [1.19 in.]) resolution with
a basic set of sensing functions.
The 450L safety light curtain family consists of two product lines:
• 450L-B (Basic)
• 450L-E (Enhanced)
Whereas the 450L-B version is suitable for basic ON/OFF applications, the
450L-E version provides enhanced features for more sophisticated applications.
Tabl e 1
provides an overview of the differences between the two product
versions:
Table 1 - Differences between 450L-B and 450L-E Safety Light Curtain Systems
The two 450L versions have no differences in cross section, protective heights
and resolutions, sealing, operating and storage temperature, and length passive
zones at the ends of each stick and mounting options.
Description 450L-B 450L-E
Alignment aid Two zone indicator light-emitting
diode (LED)
Integrated laser alignment and two zone indicator
LED
Operating range finger
resolution, max
4 m (13.12 ft) 9.0 m (29.53 ft)
Operating range hand
resolution, max
7.0 m (22.97 ft) 16.2 m (53.15 ft)
Functionality
Start modes
External device monitoring (EDM)
Operating range
Start modes
EDM
Operating range
Beam coding
Blanking
Muting
Cascading
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