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Rockwell Automation Publication 445L-IN005A-EN-P - May 2018
GuardShield Micro 400 Safety Light Curtains
The Micro 400 IP69K option has the Micro 400 light curtains factory
sealed in polycarbonate enclosures.
The GuardShield Micro 400 requires a controller to operate with one of
the following safety controllers
• MSR41 ON/OFF functionality
• MSR42 multifunction module
Proper Use
The GuardShield Micro 400 safety light curtain must be used only as
defined in the
Range of Uses of the Device on page 3
. Only qualified
personnel can use this light curtain and it can only be used on the
machine that it has been installed on and initialized by qualified
personnel.
If the device is used for any other purposes or modified in any way,
warranty claims against Allen-Bradley/Guardmaster become null and
void.
General Protective Notes and Protective Measures
The national/international rules and regulations apply to the
installation, use, and periodic technical inspections of the safety light
curtain, in particular:
• Machine Directive 2006/42/EC
• Low Voltage Directive 2006/95/EC
• Use of Work Directive (2009/104/EC)
• The work safety regulations/safety rules
• Other relevant health and safety regulations
Manufacturers and users of the machine with which the safety light
curtain is used are responsible for obtaining and observing all applicable
safety regulations and rules.
The notices, in particular the test regulations of these installation
instructions (for example, on use, mounting, installation, or integration
into the existing machine controller) must be observed.
Specialist personnel or specially qualified and authorized personnel
must conduct, record, and document the tests to confirm that the tests
can be reconstructed and retraced at any time.
The installation instructions must be made available to the user of the
machine where the GuardShield Micro 400 safety light curtain is
installed. The machine operator is to be instructed in the use of the
device by specialist personnel and must be instructed to read the
installation instructions.
Product Description
This section provides information on the special features and properties
of the safety light curtain. It describes the structure and functions of the
unit, in particular the different operating modes.
Read this section before you mount, install, and commission the unit.
Special Features
• Slim design 15 x 20 mm (0.59 x 0.79 in.)
• Built in diagnostic LEDs
• HW configurable with MSR41
• HW and SW configurable with MSR42
• M12 connector on 508 mm (20 in.) pigtails
• Low maintenance and cost-effective
Principle of Operation
The GuardShield Micro 400 safety light curtain consists of a non-
matched pair of optic units, for example, transmitter and receiver with
the same protected height and resolution. The controller functionality
of the Micro 400 light curtains is through a separate control module.
• MSR41 ON/OFF functionality
• MSR42 multifunction module
The maximum distance between transmitter and receiver is referred to
as the protective field width or range. The protective field height is the
distance between the first and last beam in the device.
The transmitter emits sequential pulses of infrared light, which the
GuardShield Micro 400 receives and processes by the connected
controller. The connected MSR controller synchronizes the timing of
the emission and reception of the infrared light pulses.
The connected controller has safety outputs [Output Signal Switching
Devices (OSSDs)] and nonsafety auxiliary outputs. When the
GuardShield Micro 400 transmitter and receiver are properly connected
and aligned, the OSSDs of the connected controller are current sourcing
+24V DC. Interruption of the sensing field causes the controller to
switch the sourced current OFF (0V DC).
When you restore the GuardShield Micro 400 sensing field (in Guard
only configuration), it causes safety outputs (OSSDs) of the controller
to switch to the active high state (resume current so24V DC).
The GuardShield Light Curtain
The GuardShield Micro 400 safety light curtain consists of a transmitter
and a receiver.
Figure 1 - Components of the GuardShield Micro 400
IMPORTANT
Observe the following items to maintain the proper and safe
use of the GuardShield Micro 400 safety light curtain.
IMPORTANT
Operating mode as manual or automatic restart (reset), EDM
(external device monitoring), blanked beams, or overriding of
the GuardShield Micro 400 are controlled from the connected
safety controller (for example, MSR42). For details, see the user
manual of the connected safety controller.
Transmitter (white)
Receiver (blue marking)