Rockwell Automation Publication 450L-IN009A-EN-P - March 2022 3
GuardShield 450L PAC Safety Light Curtain Installation Instructions
CE Marking and EC Conformity
The present product complies with the requirements of the current European and
national directives: 2006/42/EC (Machinery); 2014/30/EU (EMC); 2011/65/EU (ROHS)
Conformity has been verified. The corresponding declaration can be downloaded
at rok.auto/certifications. Rockwell Automation B.V.; Rivium Promenade 160; 2909
LM Capelle aan den ljssel; The Netherlands.
Table 2 - Status Indicators on a 450L PAC GuardShield Light Curtain
(Colors and Functions) for Normal Operation
No. Marking
Status
Indicator
Name
Color Behavior Description
1STS Status
indicator
Green On Power on and system is OK
Green Red Blinking
Configuration that is changed
or receiver was operated
previously with another
transmitter (see 450L-UM001 in
Additional Resource on page 4)
Green Off Blinking See Troubleshooting in 450L-
UM001 in Additional Resource on
page 4
Off Red Blinking
Red On
2 Transmitter Green
On Plug-in identifies stick as a
transmitter
Blinking 1 Hz
(50:50)
See Troubleshooting in 450L-
UM001 in Additional Resource on
page 4
Blinking 1 Hz
(98:2) Reduced range and/or beam
coding is activated
Off Stick is receiver
3 Receiver Green
On Plug-in identifies stick as a
receiver
Blinking 1 Hz
(98:2) Reduced range and/or beam
coding is activated
— Off Stick is transmitter
4OUT Safety
outputs
Green On Safety outputs are on (receiver)
Red On Safety outputs are off (receiver)
—Off Transmitter
5
Regional
light
intensity
level 1
Green
On Bottom half zone is not
interrupted, and intensity is OK
Blinking 1 Hz
(50:50) Bottom half zone intensity is at
the limit
— Off Bottom half zone interrupted
6
Regional
light
intensity
level 2
Green
On Top half zone is not interrupted,
and intensity is OK
Blinking 1 Hz
(50:50) Top half zone intensity is at the
limit
— Off Top half zone interrupted
7RES Start Amber On Start required (receiver)
— Off No start is required (receiver)
8MUT Muting Orange Off Light curtain that is not muted
On Light curtain that is muted
Orange Off Blinking Muting error
9BLK
Blanking
(not
supported
on 450L
PAC)
—— — —
—— — —
—— — —
10 CAS Cascading Red
Off
No cascading plug-in that is
inserted or Tx OSSDs of
connected cascade are in ON
state (Rx only)
On OSSDs of connected cascade
are in OFF state (Rx only)
Red Off Blinking Error cascading plug-in
ATTENTION: A 450L GuardShield™ safety light curtain system
is intended to be part of the safety-related control system of a
machine. Before installation, perform a thorough risk
assessment to determine whether the specifications of this
device are suitable for all foreseeable operational and
environmental characteristics of the application.
The following applications and/or environmental conditions
can lead to misuse and potentially cause severe injuries or
death (for more information see IEC 62046):
• Machines that eject materials, swarf, or component parts
• Risk of injury from thermal or other radiation
• Unacceptable noise levels
• Transparent objects are detected
• An environment that exceeds the specification limits
provided in publication 450L-UM001.
Some but not all possible limits are electrostatic discharge,
radio frequency interference, vibration/shock, ambient light,
pollution, temperature, and humidity.
Without additional measures (IEC 62998), 450L-PAC
GuardShield safety light curtains are not designed to be used
in the following applications:
•Outdoors
• Under water
• Explosive atmospheres
• Altitudes over 3000 m (1.86 miles) above sea level
• With enhanced ionizing or radar radiation
ATTENTION: The protective system must be tested for proper
operation after each change to the configuration. The 450L
GuardShield safety light curtain cannot be used with machines
that cannot be stopped electrically in an emergency. Always
maintain the required safety distance (see publication 450L-
UM001 in Additional Resource on page 4) between the 450L
GuardShield safety light curtain and a dangerous machine
movement. Additional mechanical protective devices have to
be installed if hazardous machine elements can be reached
without passing through the protective field. Improper
installation can result in serious injury or death. Never connect
the safety outputs (OSSDs) to +24V DC. The Auxiliary output is
only a status output for diagnosis purposes, for example, to
connect an indicator lamp. Do not connect this output to fulfill
safety functions. If the safety outputs are connected to +24V
DC, they are in the ON state and cannot stop hazardous
machine/application movements. Do not open or attempt to
repair or modify the 450L safety light curtain. Removal of either
of the gray safety light curtain end caps or the transparent
front window voids the warranty terms of this product. Do not
insert or remove plug-ins when power is applied to the plug-in.
Make sure that the power supply is protected against overload
(fuse with 3 A in the 24V DC circuit). Installation must be in
accordance with the publication 450L-UM001 in Additional
Resource on page 4 and implemented by qualified personnel
exclusively.
Damage occurs to the light curtain when screws are
overtightened. To avoid pollution or contamination, the
installation of a plug-in into a stick must be implemented in a
dry and clean area. Make sure that the rubber seal at the plug-
in does not get out of place when the plug-in is inserted in the
light curtain.
