Allen-Bradley GuardShield Micro 400 Safety Light Curtains Installation Instructions
Allen-Bradley GuardShield Micro 400 Safety Light Curtains are economical Type 4 safety light curtains designed for point of operation and perimeter protection. With a slim 15 x 20 mm housing, these curtains offer compact mounting options for various applications. They are available in different resolutions and protective heights, ensuring a flexible solution for safeguarding machines and personnel.
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Installation Instructions
Original Instructions
GuardShield Micro 400 Safety Light Curtains
Catalog Numbers 445L-P4xFP, 445L-C4xFP, 445L-P4xKD
Summary of Changes
This publication contains the following new or updated information. This list
includes substantive updates only and is not intended to reflect all changes.
About This Manual
This manual covers the operation and installation of the:
• GuardShield™ Micro 400 Safety Light Curtain POC, see POC on page 3
• GuardShield Micro 400 Safety Light Curtain PAC, see Perimeter Systems
(PAC) on page 20
• GuardShield Micro 400 Safety Light Curtain PAC IP69K Systems, see Micro
400 Safety Light Curtain IP69K Option on page 3
• GuardShield Micro 400 Safety Light Curtain Specials on page 2
Recognized technical regulations and quality assurance system ISO 9000 are
carefully applied during the development and production of Allen-Bradley®/
Guardmaster® products.
Follow this technical description when you install and commission the GuardShield
Micro 400 safety light curtain. You must be qualified to conduct the inspection and
commissioning.
Rockwell Automation reserves the right to change or revise the material that is
contained in this publication. Rockwell Automation cannot be held liable for
incidental or consequential damages that result from the furnishing, performance,
or use of this material.
Introduction
The GuardShield Micro 400 safety light curtain is an economical three-box
(transmitter, receiver, and controller) Type 4 safety light curtain, offered in a small
profile [15 x 20 mm (0.59 x 0.79 in.)] housing.
The protective heights are offered from 50…1200 mm (1.97…47.24 in.) in
50 mm (1.97 in.) increments. The compact housing size allows the GuardShield
Micro 400 safety light curtain to mount in areas where standard safety light
curtains cannot mount due to space constraints. You can also recess the
GuardShield Micro 400 safety light curtain transmitter and receiver into machine
frames.
Micro 400 Safety Light Curtain System
The Micro 400 safety light curtain requires a dedicated controller, either an MSR41
safety module, which has on/off functionality, or an MSR42 safety module, which
offers an advanced functionality of fixed and floating blanking, manual restart and
muting. The MSR42 safety module can also be used as a multifunction safety
module, which allows the connection of additional safety light curtains, safety
laser scanner, or any safety device with PNP type outputs.
The Micro 400 safety light curtain transmitter and receiver are offered with 8-pin
M12 connectors at the end of 500 mm (20 in.) pigtail cables. The two patchcords to
connect the transmitter and receiver to the controller are the same part number
and are offered in various lengths. These patchcords are configured on one end
with M12 connectors, which mate to the integrated pigtail connectors of the safety
light curtain. The RJ45 connectors on the opposite end plug into to the MSR41 or
MSR42 safety module.
Topic Page
Summary of Changes 1
About This Manual 1
Introduction 1
Important Requirements 2
Safety Precautions — Principles for Safe Use and Symbols Used 2
Specialist Personnel 3
Range of Uses of the Device 3
Product Description 3
Special Features 3
Principle of Operation 3
GuardShield Safety Light Curtain 4
Cascading 4
Examples of Range of Use 4
Safety Functions 4
Response Time 4
Determine the Safety Distance 5
Installation and Mounting 7
Installation and Alignment Procedure 8
Micro 400 Safety Light Curtain IP69K 9
Mounting Brackets 10
Electrical Installation — Connections 10
Checklist 12
Troubleshooting 12
Safety Instructions—Maintenance 13
Product Label 13
14
Catalog Number Explanation 15
GuardShield Micro 400 Safety Light Curtain Products 15
Approximate Dimensions 17
Accessories 18
GuardShield Micro 400 Special Safety Light Curtain Systems 19
Declaration of Conformity 24
Topic Page
Updated Shock and Vibration 14
IMPORTANT Save these instructions for future use.
Original Instructions
GuardShield Micro 400 Safety Light Curtains
Catalog Numbers 445L-P4xFP, 445L-C4xFP, 445L-P4xKD
Summary of Changes
This publication contains the following new or updated information. This list
includes substantive updates only and is not intended to reflect all changes.
About This Manual
This manual covers the operation and installation of the:
• GuardShield™ Micro 400 Safety Light Curtain POC, see POC on page 3
• GuardShield Micro 400 Safety Light Curtain PAC, see Perimeter Systems
(PAC) on page 20
• GuardShield Micro 400 Safety Light Curtain PAC IP69K Systems, see Micro
400 Safety Light Curtain IP69K Option on page 3
• GuardShield Micro 400 Safety Light Curtain Specials on page 2
Recognized technical regulations and quality assurance system ISO 9000 are
carefully applied during the development and production of Allen-Bradley®/
Guardmaster® products.
Follow this technical description when you install and commission the GuardShield
Micro 400 safety light curtain. You must be qualified to conduct the inspection and
commissioning.
Rockwell Automation reserves the right to change or revise the material that is
contained in this publication. Rockwell Automation cannot be held liable for
incidental or consequential damages that result from the furnishing, performance,
or use of this material.
Introduction
The GuardShield Micro 400 safety light curtain is an economical three-box
(transmitter, receiver, and controller) Type 4 safety light curtain, offered in a small
profile [15 x 20 mm (0.59 x 0.79 in.)] housing.
The protective heights are offered from 50…1200 mm (1.97…47.24 in.) in
50 mm (1.97 in.) increments. The compact housing size allows the GuardShield
Micro 400 safety light curtain to mount in areas where standard safety light
curtains cannot mount due to space constraints. You can also recess the
GuardShield Micro 400 safety light curtain transmitter and receiver into machine
frames.
Micro 400 Safety Light Curtain System
The Micro 400 safety light curtain requires a dedicated controller, either an MSR41
safety module, which has on/off functionality, or an MSR42 safety module, which
offers an advanced functionality of fixed and floating blanking, manual restart and
muting. The MSR42 safety module can also be used as a multifunction safety
module, which allows the connection of additional safety light curtains, safety
laser scanner, or any safety device with PNP type outputs.
The Micro 400 safety light curtain transmitter and receiver are offered with 8-pin
M12 connectors at the end of 500 mm (20 in.) pigtail cables. The two patchcords to
connect the transmitter and receiver to the controller are the same part number
and are offered in various lengths. These patchcords are configured on one end
with M12 connectors, which mate to the integrated pigtail connectors of the safety
light curtain. The RJ45 connectors on the opposite end plug into to the MSR41 or
MSR42 safety module.
Topic Page
Summary of Changes 1
About This Manual 1
Introduction 1
Important Requirements 2
Safety Precautions — Principles for Safe Use and Symbols Used 2
Specialist Personnel 3
Range of Uses of the Device 3
Product Description 3
Special Features 3
Principle of Operation 3
GuardShield Safety Light Curtain 4
Cascading 4
Examples of Range of Use 4
Safety Functions 4
Response Time 4
Determine the Safety Distance 5
Installation and Mounting 7
Installation and Alignment Procedure 8
Micro 400 Safety Light Curtain IP69K 9
Mounting Brackets 10
Electrical Installation — Connections 10
Checklist 12
Troubleshooting 12
Safety Instructions—Maintenance 13
Product Label 13
14
Catalog Number Explanation 15
GuardShield Micro 400 Safety Light Curtain Products 15
Approximate Dimensions 17
Accessories 18
GuardShield Micro 400 Special Safety Light Curtain Systems 19
Declaration of Conformity 24
Topic Page
Updated Shock and Vibration 14
IMPORTANT Save these instructions for future use.
2 Rockwell Automation Publication 445L-IN005C-EN-P - January 2024
GuardShield Micro 400 Safety Light Curtains Installation Instructions
Micro 400 Safety Light Curtain Cascading
The GuardShield Micro 400 safety light curtain is also offered in a cascadable
configuration. GuardShield Cascadable Micro 400 safety light curtains allow the
interconnection of multiple segments of the Micro 400 safety light curtain with a
common pair of safety outputs. The cascadable configurability of the GuardShield
Micro 400 safety light curtain reduces overall system wiring. The cascadable
configurability allows the series connection of multiple protective fields, for
example, the front and the backside of an application or a combined horizontal and
vertical protection area.
A GuardShield Cascadable Micro 400 safety light curtain system is composed of
one or two pairs of Cascadable Micro 400 safety light curtains.
GuardShield Micro 400 safety light curtain cascaded pairs are offered in both
14 mm (0.55 in.) and 30 mm (1.18 in.) resolutions in limited protected heights. You
can mix 14 mm (0.55 in.) and 30 mm (1.18 in.) resolution pairs in a Cascaded Micro
400 safety light curtain system.
A cascadable pair of GuardShield Micro 400 safety light curtains has two 500 mm
(20 in.) pigtails at each stick with a concave (bottom) and a convex (top) M12 quick
disconnect.
The GuardShield Cascadable Micro 400 safety light curtain system operates as one
safety light curtain pair with a common set of OSSDs. Each segment pair connects
in series. The complete system response time is the sum of each segment pair,
plus the response time of the MSR41 or MSR42 safety module and other safety
devices in the stop circuit.
When you connect two cascadable segments together, the resultant cable length
between segments is 1000 mm (40 in.).
If you require an additional length between segment pairs, M12 patchcords in 1 m,
3 m, and 5 m (3.3 ft, 9.8 ft, and 16.4 ft) lengths (catalog number 445L-AC8PC1 or
445L-AC8PC3) are offered.
Micro 400 Safety Light Curtain Washdown Option
The GuardShield Micro 400 safety light curtain is offered with the transmitter and
receiver that is sealed in clear polycarbonate tubes with an environmental rating
of IP69K. These IP69K Micro 400 safety light curtains are factory sealed and are
ordered as pairs. They are offered in a 14 mm (0.55 in.) resolution in protected
heights from 150…1200 mm (5.9…47.2 in.). See Table 13 on page 16 for available
models.
The required MSR41 or MSR42 safety modules maintain the IP20 rating and must be
mounted in a suitable enclosure.
The Micro 400 safety light curtain IP69K transmitter and receiver are both offered
with 8-pin M12 connectors at the end of 500 mm (20 in.) integrated cables. The
patchcords to connect the transmitter and receiver to the controller are offered in
1 m, 2 m, 3 m, 5 m, and 8 m (3.3 ft, 6.6 ft, 9.8 ft, 16.4 ft, and 26.2 ft) lengths.
These patchcords are configured on one end with M12 connectors for the safety
light curtain pigtail and RJ45 connectors on the opposite end for the MSR41 or
MSR42 safety module.
Micro 400 Safety Light Curtain Specials
The GuardShield Micro 400 safety light curtain is also offered in special
configurations as described in GuardShield Micro 400 Safety Light Curtain
Products on page 15.
The GuardShield Micro 400 safety light curtains are general-purpose presence
sensing devices, providing point of operation (POC) and perimeter (PAC) detection.
Important Requirements
The GuardShield Micro 400 safety light curtain requires a dedicated controller. The
MSR41 safety module is used for on/off applications. The MSR42 safety module can
also be used as a multi-functional safety module and allows these connections:
• Additional safety light curtains
• Safety laser scanner
• Safety devices with two Output Signal Switch Devices (OSSD) outputs
• Safety switch with two contacts (E-stops and enabling switches)
There are a number of operating modes that you can configure with the MSR42
safety module. EDM, Start/Restart Interlock, Fixed and Floating Blanking, and
Muting modes are possible.
Safety Precautions — Principles for Safe Use and
Symbols Used
The following instructions are preventive warnings to confirm the safe and proper
operation of the GuardShield Micro 400 safety light curtains. These instructions
are an essential part of the safety precautions and therefore you must always
observe.
Throughout this manual, we use the labels ATTENTION and IMPORTANT to alert you
to the following:
IMPORTANT The standard GuardShield Micro 400 safety light curtain
must always be the last segment in a Cascaded Micro 400
safety light curtain system.
IMPORTANT The maximum cascaded Micro 400 safety light curtain
system length cannot exceed 10 m (32.8 ft). This distance is
measured between the RJ45 connection at the MSR 41 or
MSR 42 safety module to the last beam in the standard
Micro 400 safety light curtain (including all cable lengths).
The maximum number of beams in a cascaded Micro 400
safety light curtain system cannot exceed 255 beams.
IMPORTANT These installation instructions are designed to address the
technical personnel of the machine manufacturer and or
the installer of the safety system. These instructions
describe the proper mounting, configuration, electrical
installation, commissioning, operation, and maintenance of
the GuardShield Micro 400 safety light curtain. These
installation instructions do not provide instruction for the
operation of machinery to which the GuardShield Micro 400
safety light curtain is integrated. Only qualified personnel
can install this equipment.
ATTENTION: Identifies information about practices or
circumstances that can lead to personal injury or death,
property damage, or economic loss. Attentions help you
identify a hazard, avoid a hazard, and recognize the
consequences.
IMPORTANT Identifies information that is critical for the successful
application and understanding of the product.
ATTENTION: Do not use the GuardShield Micro 400 safety light
curtain with machines that cannot be stopped electrically in an
emergency.
The safety distance between the GuardShield Micro 400 safety
light curtain and a dangerous machine movement must be
maintained always.
Additional mechanical protective devices must be installed in a
way that hazardous machine elements cannot be reached
without passing through the protective field.
The GuardShield Micro 400 safety light curtain must be
installed in a way that operators can only access the hazard
through the sensing field of the Micro 400 safety light curtain.
Improper installation can result in serious injury.
Never connect the outputs to +24V DC. If the outputs are
connected to +24V DC, they are in the on-state and cannot stop
hazardous spots at the machine/application.
Never expose the GuardShield Micro 400 safety light curtain to
flammable or explosive gases.
Regular safety inspections are imperative (see
Safety Instructions—Maintenance on page 13).
GuardShield Micro 400 Safety Light Curtains Installation Instructions
Micro 400 Safety Light Curtain Cascading
The GuardShield Micro 400 safety light curtain is also offered in a cascadable
configuration. GuardShield Cascadable Micro 400 safety light curtains allow the
interconnection of multiple segments of the Micro 400 safety light curtain with a
common pair of safety outputs. The cascadable configurability of the GuardShield
Micro 400 safety light curtain reduces overall system wiring. The cascadable
configurability allows the series connection of multiple protective fields, for
example, the front and the backside of an application or a combined horizontal and
vertical protection area.
A GuardShield Cascadable Micro 400 safety light curtain system is composed of
one or two pairs of Cascadable Micro 400 safety light curtains.
GuardShield Micro 400 safety light curtain cascaded pairs are offered in both
14 mm (0.55 in.) and 30 mm (1.18 in.) resolutions in limited protected heights. You
can mix 14 mm (0.55 in.) and 30 mm (1.18 in.) resolution pairs in a Cascaded Micro
400 safety light curtain system.
A cascadable pair of GuardShield Micro 400 safety light curtains has two 500 mm
(20 in.) pigtails at each stick with a concave (bottom) and a convex (top) M12 quick
disconnect.
The GuardShield Cascadable Micro 400 safety light curtain system operates as one
safety light curtain pair with a common set of OSSDs. Each segment pair connects
in series. The complete system response time is the sum of each segment pair,
plus the response time of the MSR41 or MSR42 safety module and other safety
devices in the stop circuit.
When you connect two cascadable segments together, the resultant cable length
between segments is 1000 mm (40 in.).
If you require an additional length between segment pairs, M12 patchcords in 1 m,
3 m, and 5 m (3.3 ft, 9.8 ft, and 16.4 ft) lengths (catalog number 445L-AC8PC1 or
445L-AC8PC3) are offered.
Micro 400 Safety Light Curtain Washdown Option
The GuardShield Micro 400 safety light curtain is offered with the transmitter and
receiver that is sealed in clear polycarbonate tubes with an environmental rating
of IP69K. These IP69K Micro 400 safety light curtains are factory sealed and are
ordered as pairs. They are offered in a 14 mm (0.55 in.) resolution in protected
heights from 150…1200 mm (5.9…47.2 in.). See Table 13 on page 16 for available
models.
The required MSR41 or MSR42 safety modules maintain the IP20 rating and must be
mounted in a suitable enclosure.
The Micro 400 safety light curtain IP69K transmitter and receiver are both offered
with 8-pin M12 connectors at the end of 500 mm (20 in.) integrated cables. The
patchcords to connect the transmitter and receiver to the controller are offered in
1 m, 2 m, 3 m, 5 m, and 8 m (3.3 ft, 6.6 ft, 9.8 ft, 16.4 ft, and 26.2 ft) lengths.
These patchcords are configured on one end with M12 connectors for the safety
light curtain pigtail and RJ45 connectors on the opposite end for the MSR41 or
MSR42 safety module.
Micro 400 Safety Light Curtain Specials
The GuardShield Micro 400 safety light curtain is also offered in special
configurations as described in GuardShield Micro 400 Safety Light Curtain
Products on page 15.
The GuardShield Micro 400 safety light curtains are general-purpose presence
sensing devices, providing point of operation (POC) and perimeter (PAC) detection.
Important Requirements
The GuardShield Micro 400 safety light curtain requires a dedicated controller. The
MSR41 safety module is used for on/off applications. The MSR42 safety module can
also be used as a multi-functional safety module and allows these connections:
• Additional safety light curtains
• Safety laser scanner
• Safety devices with two Output Signal Switch Devices (OSSD) outputs
• Safety switch with two contacts (E-stops and enabling switches)
There are a number of operating modes that you can configure with the MSR42
safety module. EDM, Start/Restart Interlock, Fixed and Floating Blanking, and
Muting modes are possible.
Safety Precautions — Principles for Safe Use and
Symbols Used
The following instructions are preventive warnings to confirm the safe and proper
operation of the GuardShield Micro 400 safety light curtains. These instructions
are an essential part of the safety precautions and therefore you must always
observe.
Throughout this manual, we use the labels ATTENTION and IMPORTANT to alert you
to the following:
IMPORTANT The standard GuardShield Micro 400 safety light curtain
must always be the last segment in a Cascaded Micro 400
safety light curtain system.
IMPORTANT The maximum cascaded Micro 400 safety light curtain
system length cannot exceed 10 m (32.8 ft). This distance is
measured between the RJ45 connection at the MSR 41 or
MSR 42 safety module to the last beam in the standard
Micro 400 safety light curtain (including all cable lengths).
The maximum number of beams in a cascaded Micro 400
safety light curtain system cannot exceed 255 beams.
IMPORTANT These installation instructions are designed to address the
technical personnel of the machine manufacturer and or
the installer of the safety system. These instructions
describe the proper mounting, configuration, electrical
installation, commissioning, operation, and maintenance of
the GuardShield Micro 400 safety light curtain. These
installation instructions do not provide instruction for the
operation of machinery to which the GuardShield Micro 400
safety light curtain is integrated. Only qualified personnel
can install this equipment.
ATTENTION: Identifies information about practices or
circumstances that can lead to personal injury or death,
property damage, or economic loss. Attentions help you
identify a hazard, avoid a hazard, and recognize the
consequences.
IMPORTANT Identifies information that is critical for the successful
application and understanding of the product.
ATTENTION: Do not use the GuardShield Micro 400 safety light
curtain with machines that cannot be stopped electrically in an
emergency.
The safety distance between the GuardShield Micro 400 safety
light curtain and a dangerous machine movement must be
maintained always.
Additional mechanical protective devices must be installed in a
way that hazardous machine elements cannot be reached
without passing through the protective field.
The GuardShield Micro 400 safety light curtain must be
installed in a way that operators can only access the hazard
through the sensing field of the Micro 400 safety light curtain.
Improper installation can result in serious injury.
Never connect the outputs to +24V DC. If the outputs are
connected to +24V DC, they are in the on-state and cannot stop
hazardous spots at the machine/application.
Never expose the GuardShield Micro 400 safety light curtain to
flammable or explosive gases.
Regular safety inspections are imperative (see
Safety Instructions—Maintenance on page 13).
Rockwell Automation Publication 445L-IN005C-EN-P - January 2024 3
GuardShield Micro 400 Safety Light Curtains Installation Instructions
Specialist Personnel
A qualified person must install, commission, and service the GuardShield Micro 400
safety light curtain. A qualified person is defined as a person who:
• Has undergone the appropriate technical training
• Is instructed in the operation of the machine and the currently valid safety
guidelines
• Has read and has ongoing access to these installation instructions
Range of Uses of the Device
The GuardShield Micro 400 safety light curtain is classified as electro-sensitive
protective equipment (ESPE). These devices fulfill the requirements of a Type 4
ESPE defined by IEC 61496-1 and CLC/TS 61496-2 and are, therefore, allowed for use
with controls in safety category Type 4 in compliance with EN ISO 13849, SIL CL 3 in
accordance with EN62061 or up to PLe in accordance with EN ISO 13849.
These devices are suitable for:
• Point of operation protection (finger and hand protection)
• Hazardous area protection
Access to the hazardous point must only be allowed through the protective field.
The machine/system is not allowed to start as long as personnel are within the
hazardous area. See the Examples of Range of Use on page 4 for an illustration of
the protective modes.
Depending on the application, mechanical protection devices can be required
along with the safety light curtain.
POC
The GuardShield Micro 400 safety light curtain POC is available in the following
physical resolutions:
• 14 mm (0.55 in.)
• 30 mm (1.18 in.)
The protective field height of the standard GuardShield Micro 400 safety light
curtain is 50…1200 mm (1.97…47.2 in.).
The maximum protective field width is 0…5 m (16.4 ft).
Cascadable Micro 400 Safety Light Curtain
The cascadable GuardShield Micro 400 safety light curtain POC is available in the
following physical resolutions.
• 14 mm (0.55 in.)
• 30 mm (1.18 in.)
The protective field height of the cascadable GuardShield Micro 400 safety light
curtain is 300…1200 mm (11.82…47.2 in.). The maximum protective field width is
0…5 m (16.4 ft).
Micro 400 Safety Light Curtain IP69K Option
The physical resolution of the GuardShield Micro 400 safety light curtain IP69K is
14 mm (0.55 in.). The protective field height of the GuardShield Micro 400 safety
light curtain IP69K is 150…1200 mm (5.9…47.2 in.). See Table 13 on page 16 for
available models. The maximum protective field width is 0…5 m (16.4 ft).
The Micro 400 safety light curtain IP69K option is factory sealed in polycarbonate
enclosures.
The GuardShield Micro 400 safety light curtain requires a controller to operate with
one of the following safety modules.
• MSR41 - on/off functionality
• MSR42 - multifunction
Proper Use
Only use the GuardShield Micro 400 safety light curtain as defined in the
Range of Uses of the Device. Only qualified personnel can use this safety light
curtain, and only on the machine that the device was installed 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:
• Machinery Directive 2006/42/EC
• Low Voltage Directive 2014/35/EU
• 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.
Observe the notices, in particular the test regulations of these installation
instructions (for example, on use, mounting, installation, or integration into the
existing machine controller).
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. Specialist
personnel must instruct the machine operator on the use of the device and to read
the installation instructions.
Product Description
This section provides information on the special features and properties of the
safety light curtain. This section describes the structure and functions of the
device, 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 status indicators
• HW configurable with MSR41 safety module
• HW and SW configurable with MSR42 safety module
• 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 nonmatched pair of
optic units, for example, transmitter and receiver with the same protected height
and resolution. The controller functionality of the Micro 400 safety light curtains is
through a separate safety module:
• MSR41 - on/off functionality
• MSR42 - multifunction
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 safety light curtain receives and the connected controller processes.
The connected MSR controller synchronizes the timing of the emission and
reception of the infrared light pulses.
IMPORTANT The operating range can degrade by up to 50% in the
polycarbonate enclosure.
IMPORTANT Observe the following items to maintain the proper and
safe use of the GuardShield Micro 400 safety light curtain.
GuardShield Micro 400 Safety Light Curtains Installation Instructions
Specialist Personnel
A qualified person must install, commission, and service the GuardShield Micro 400
safety light curtain. A qualified person is defined as a person who:
• Has undergone the appropriate technical training
• Is instructed in the operation of the machine and the currently valid safety
guidelines
• Has read and has ongoing access to these installation instructions
Range of Uses of the Device
The GuardShield Micro 400 safety light curtain is classified as electro-sensitive
protective equipment (ESPE). These devices fulfill the requirements of a Type 4
ESPE defined by IEC 61496-1 and CLC/TS 61496-2 and are, therefore, allowed for use
with controls in safety category Type 4 in compliance with EN ISO 13849, SIL CL 3 in
accordance with EN62061 or up to PLe in accordance with EN ISO 13849.
These devices are suitable for:
• Point of operation protection (finger and hand protection)
• Hazardous area protection
Access to the hazardous point must only be allowed through the protective field.
The machine/system is not allowed to start as long as personnel are within the
hazardous area. See the Examples of Range of Use on page 4 for an illustration of
the protective modes.
Depending on the application, mechanical protection devices can be required
along with the safety light curtain.
POC
The GuardShield Micro 400 safety light curtain POC is available in the following
physical resolutions:
• 14 mm (0.55 in.)
• 30 mm (1.18 in.)
The protective field height of the standard GuardShield Micro 400 safety light
curtain is 50…1200 mm (1.97…47.2 in.).
The maximum protective field width is 0…5 m (16.4 ft).
Cascadable Micro 400 Safety Light Curtain
The cascadable GuardShield Micro 400 safety light curtain POC is available in the
following physical resolutions.
• 14 mm (0.55 in.)
• 30 mm (1.18 in.)
The protective field height of the cascadable GuardShield Micro 400 safety light
curtain is 300…1200 mm (11.82…47.2 in.). The maximum protective field width is
0…5 m (16.4 ft).
Micro 400 Safety Light Curtain IP69K Option
The physical resolution of the GuardShield Micro 400 safety light curtain IP69K is
14 mm (0.55 in.). The protective field height of the GuardShield Micro 400 safety
light curtain IP69K is 150…1200 mm (5.9…47.2 in.). See Table 13 on page 16 for
available models. The maximum protective field width is 0…5 m (16.4 ft).
The Micro 400 safety light curtain IP69K option is factory sealed in polycarbonate
enclosures.
The GuardShield Micro 400 safety light curtain requires a controller to operate with
one of the following safety modules.
• MSR41 - on/off functionality
• MSR42 - multifunction
Proper Use
Only use the GuardShield Micro 400 safety light curtain as defined in the
Range of Uses of the Device. Only qualified personnel can use this safety light
curtain, and only on the machine that the device was installed 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:
• Machinery Directive 2006/42/EC
• Low Voltage Directive 2014/35/EU
• 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.
Observe the notices, in particular the test regulations of these installation
instructions (for example, on use, mounting, installation, or integration into the
existing machine controller).
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. Specialist
personnel must instruct the machine operator on the use of the device and to read
the installation instructions.
Product Description
This section provides information on the special features and properties of the
safety light curtain. This section describes the structure and functions of the
device, 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 status indicators
• HW configurable with MSR41 safety module
• HW and SW configurable with MSR42 safety module
• 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 nonmatched pair of
optic units, for example, transmitter and receiver with the same protected height
and resolution. The controller functionality of the Micro 400 safety light curtains is
through a separate safety module:
• MSR41 - on/off functionality
• MSR42 - multifunction
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 safety light curtain receives and the connected controller processes.
The connected MSR controller synchronizes the timing of the emission and
reception of the infrared light pulses.
IMPORTANT The operating range can degrade by up to 50% in the
polycarbonate enclosure.
IMPORTANT Observe the following items to maintain the proper and
safe use of the GuardShield Micro 400 safety light curtain.
4 Rockwell Automation Publication 445L-IN005C-EN-P - January 2024
GuardShield Micro 400 Safety Light Curtains Installation Instructions
The connected controller has safety outputs [Output Signal Switching Devices
(OSSDs)] and nonsafety auxiliary outputs. When the GuardShield Micro 400 safety
light curtain 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 off the sourced current (0V DC).
When you restore the GuardShield Micro 400 safety light curtain sensing field (in
guard only configuration), the safety outputs (OSSDs) of the controller switch to the
active high state (resume current sourcing +24V DC).
GuardShield Safety Light Curtain
The GuardShield Micro 400 safety light curtain consists of a transmitter and a
receiver.
Figure 1 - Components of the GuardShield Micro 400 Safety Light Curtain
The protective field is between the bottom of the top end cap and the area above
the status indicators.
The width of the protective field is derived from the distance between transmitter
and receiver. The distance must not exceed the maximum rated width of the
protective field 0…5 m (0…16.4 ft).
Cascading
The GuardShield Micro 400 safety light curtain POC is also available in cascading
segments, which allow a number of GuardShield Micro 400 safety light curtain
transmitters and receivers to interconnect. This product configurability allows the
GuardShield Micro 400 safety light curtain to help protect multiple sides of a
machine, or simply adds flexibility when positioning the GuardShield Micro 400
safety light curtain in various applications.
Up to three GuardShield Micro 400 safety light curtain segments can interconnect.
Figure 2 - Three GuardShield Micro 400 Safety Light Curtain Segments
Standard GuardShield Micro 400 cascading segments are offered in protective
heights from 150…1200 mm (5.91…47.2 in.) in both 14 mm (0.55 in.) and 30 mm
(1.18 in.) resolutions.
A maximum of three GuardShield Micro 400 safety light curtains can interconnect
(maximum two cascades plus one standard GuardShield Micro 400 safety light
curtain). The maximum number of beams in a cascading system is 255 beams. The
individual segments can have mixed resolutions as long as the pairs have the same
protective heights and resolutions. The maximum cable length from the control
unit to the last beam can be 10 m (32.8 ft).
Cascading segments cannot be used as standalone safety light curtain pairs.
However, whether you use multiple cascaded pairs or only one, the last pair in the
cascaded system must be a standard GuardShield Micro 400 safety light curtain.
Consider the following limitations.
• A maximum of 255 light beams per controller
• 10 m (32.8 ft) maximum total length for safety light curtains, extension
modules, and connection cable combined (Figure 2)
• Only use a Rockwell Automation® patchcord (catalog number 445L-AC8xxx)
between the safety light curtains and the controller. A patchcord is
required to connect the M12 connector of the Micro 400 safety light curtain
to either the MSR41 or MSR42 safety module. The patchcord has an 8-pin
M12 on one end and an RJ45 connector on the opposite end.
Examples of Range of Use
The GuardShield Micro 400 safety light curtain operates as a proper protective
device only if the following conditions are met.
• The control of the machine must be electrical.
• The controlled machine must be able to stop anywhere in the machines
stroke or cycle.
• The transmitter and receiver must be mounted so access to the hazard is
only through the safety light curtain protective field.
• If used as an access device, the Restart button must be outside the
hazardous area. This location helps to prevent the startup of machinery
while personnel are inside the hazardous area.
• Observe the statutory and local rules and regulations when you install and
use the device.
Safety Functions
The GuardShield Micro 400 safety light curtain offers various functions, which are
integral to the system.
Operating modes, functions, and features of the GuardShield system are activated
through the hardware or software of the corresponding connected MSR41 or MSR42
safety module. For details, see the manual of the attached controller.
Response Time
The standard response time of the safety light curtain (see Table 1 on page 5) is
dependent on the physical resolution and the protective height and is shown on the
product label. The actual response time depends on the connected control unit and
its configuration. The response time can be faster and can be taken from the
corresponding configuration control document, created from the configuration
software of the corresponding safety controller (for example, the MSR42 safety
module).
The total safety light curtain system response time for a cascaded system is the
sum of the response times of each cascade plus the response time of the standard
safety light curtain. The declared response times are worst case values.
IMPORTANT The connected safety controller (for example, the MSR42
safety module) control operating modes such as Manual or
Automatic Restart (reset), EDM (external device
monitoring), blanked beams, or overriding of the
GuardShield Micro 400 safety light curtain. For details, see
the user manual of the connected safety controller.
Transmitter (white cable marking)
Receiver (blue cable marking)
Patchcords
Last segment pair
must be a standard
Micro 400 pair
The last segment pair must be a standard
Micro 400 safety light curtain pair
Patchcord
IMPORTANT Additional measures can be necessary so the ESPE does
not fail to danger when other forms of light radiation are
present in a particular application (for example, the use of
cableless control devices on cranes, radiation from weld
spatter, or effects from strobe lights).
IMPORTANT The protective system must be tested for proper operation
after every change to the configuration.
GuardShield Micro 400 Safety Light Curtains Installation Instructions
The connected controller has safety outputs [Output Signal Switching Devices
(OSSDs)] and nonsafety auxiliary outputs. When the GuardShield Micro 400 safety
light curtain 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 off the sourced current (0V DC).
When you restore the GuardShield Micro 400 safety light curtain sensing field (in
guard only configuration), the safety outputs (OSSDs) of the controller switch to the
active high state (resume current sourcing +24V DC).
GuardShield Safety Light Curtain
The GuardShield Micro 400 safety light curtain consists of a transmitter and a
receiver.
Figure 1 - Components of the GuardShield Micro 400 Safety Light Curtain
The protective field is between the bottom of the top end cap and the area above
the status indicators.
The width of the protective field is derived from the distance between transmitter
and receiver. The distance must not exceed the maximum rated width of the
protective field 0…5 m (0…16.4 ft).
Cascading
The GuardShield Micro 400 safety light curtain POC is also available in cascading
segments, which allow a number of GuardShield Micro 400 safety light curtain
transmitters and receivers to interconnect. This product configurability allows the
GuardShield Micro 400 safety light curtain to help protect multiple sides of a
machine, or simply adds flexibility when positioning the GuardShield Micro 400
safety light curtain in various applications.
Up to three GuardShield Micro 400 safety light curtain segments can interconnect.
Figure 2 - Three GuardShield Micro 400 Safety Light Curtain Segments
Standard GuardShield Micro 400 cascading segments are offered in protective
heights from 150…1200 mm (5.91…47.2 in.) in both 14 mm (0.55 in.) and 30 mm
(1.18 in.) resolutions.
A maximum of three GuardShield Micro 400 safety light curtains can interconnect
(maximum two cascades plus one standard GuardShield Micro 400 safety light
curtain). The maximum number of beams in a cascading system is 255 beams. The
individual segments can have mixed resolutions as long as the pairs have the same
protective heights and resolutions. The maximum cable length from the control
unit to the last beam can be 10 m (32.8 ft).
Cascading segments cannot be used as standalone safety light curtain pairs.
However, whether you use multiple cascaded pairs or only one, the last pair in the
cascaded system must be a standard GuardShield Micro 400 safety light curtain.
Consider the following limitations.
• A maximum of 255 light beams per controller
• 10 m (32.8 ft) maximum total length for safety light curtains, extension
modules, and connection cable combined (Figure 2)
• Only use a Rockwell Automation® patchcord (catalog number 445L-AC8xxx)
between the safety light curtains and the controller. A patchcord is
required to connect the M12 connector of the Micro 400 safety light curtain
to either the MSR41 or MSR42 safety module. The patchcord has an 8-pin
M12 on one end and an RJ45 connector on the opposite end.
Examples of Range of Use
The GuardShield Micro 400 safety light curtain operates as a proper protective
device only if the following conditions are met.
• The control of the machine must be electrical.
• The controlled machine must be able to stop anywhere in the machines
stroke or cycle.
• The transmitter and receiver must be mounted so access to the hazard is
only through the safety light curtain protective field.
• If used as an access device, the Restart button must be outside the
hazardous area. This location helps to prevent the startup of machinery
while personnel are inside the hazardous area.
• Observe the statutory and local rules and regulations when you install and
use the device.
Safety Functions
The GuardShield Micro 400 safety light curtain offers various functions, which are
integral to the system.
Operating modes, functions, and features of the GuardShield system are activated
through the hardware or software of the corresponding connected MSR41 or MSR42
safety module. For details, see the manual of the attached controller.
Response Time
The standard response time of the safety light curtain (see Table 1 on page 5) is
dependent on the physical resolution and the protective height and is shown on the
product label. The actual response time depends on the connected control unit and
its configuration. The response time can be faster and can be taken from the
corresponding configuration control document, created from the configuration
software of the corresponding safety controller (for example, the MSR42 safety
module).
The total safety light curtain system response time for a cascaded system is the
sum of the response times of each cascade plus the response time of the standard
safety light curtain. The declared response times are worst case values.
IMPORTANT The connected safety controller (for example, the MSR42
safety module) control operating modes such as Manual or
Automatic Restart (reset), EDM (external device
monitoring), blanked beams, or overriding of the
GuardShield Micro 400 safety light curtain. For details, see
the user manual of the connected safety controller.
Transmitter (white cable marking)
Receiver (blue cable marking)
Patchcords
Last segment pair
must be a standard
Micro 400 pair
The last segment pair must be a standard
Micro 400 safety light curtain pair
Patchcord
IMPORTANT Additional measures can be necessary so the ESPE does
not fail to danger when other forms of light radiation are
present in a particular application (for example, the use of
cableless control devices on cranes, radiation from weld
spatter, or effects from strobe lights).
IMPORTANT The protective system must be tested for proper operation
after every change to the configuration.
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Key Features
- Slim design
- Cascadable configuration
- IP69K Washdown option
- Multiple operating modes
- Built-in diagnostics
- M12 connectors
- Low maintenance
Related manuals
Frequently Answers and Questions
What is the maximum protective field width of the GuardShield Micro 400 safety light curtain?
The maximum protective field width is 0…5 m (0…16.4 ft).
What are the available resolutions for the cascadable GuardShield Micro 400 safety light curtain?
The cascadable GuardShield Micro 400 safety light curtain is available in 14 mm (0.55 in.) and 30 mm (1.18 in.) resolutions.
What is the maximum number of beams in a cascaded Micro 400 safety light curtain system?
The maximum number of beams in a cascaded Micro 400 safety light curtain system cannot exceed 255 beams.
What is the operating range of the GuardShield Micro 400 safety light curtain IP69K option?
The operating range can degrade by up to 50% in the polycarbonate enclosure.
What are the different operating modes available with the MSR42 safety module?
The MSR42 safety module offers various operating modes, including EDM, Start/Restart Interlock, Fixed and Floating Blanking, and Muting.
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