Rockwell Automation Allen-Bradley 440G-EZ User manual

440G-EZ Interlocking Safety Switch
Catalog Numbers 440G-EZS21STL05J, 440G-EZS21STL05H
User Manual
Original Instructions

Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are
required to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may
be impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from
the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Labels may also be on or inside the equipment to provide specific precautions.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous
environment, which may lead to personal injury or death, property damage, or economic loss.
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 consequence.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death.Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

Rockwell Automation Publication 440G-UM003A-EN-P - February 2020 3
Table of Contents
Preface
Who Should Use This Publication?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 1
Safety Information Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Requirements for Qualified Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Project Planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mechanical Mounting, Electrical Installation,
and Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operation and Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 2
Product Overview Structure and Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Product Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Locking Principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Protective Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 3
Project Planning Manufacturer of the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operating Entity of the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Mounting Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Mounting Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electrical Control Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
OSSDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Course of the OSSD Test Over Time . . . . . . . . . . . . . . . . . . . . . . . 17
Locking Solenoid Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Application Diagnostic Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Thorough-check Concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Regular Thorough Check Minimum Requirements . . . . . . . . . . 18
Chapter 4
Installation Mount Multiple Safety Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Mount the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Mount the Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Table of Contents
Chapter 5
Wiring Notes on c-UL-us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Device Connection (M12, 5-pin). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Device Connection (M12, 8-pin). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Connect Safety Switches with T-connectors . . . . . . . . . . . . . . . . . . . . . 25
Chapter 6
Commissioning Switch On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Thorough-check Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Chapter 7
Maintenance and
Troubleshooting
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Clean the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Regular Thorough Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendix A
Specifications Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Approximate Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Appendix B
Ordering Information Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Appendix C
Replacement Parts/Accessories Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Appendix D
Declaration of Conformity (DoC) EU DoC (excerpt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Complete EU DoC for Download. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Rockwell Automation Publication 440G-UM003A-EN-P - February 2020 5
Preface
This user manual contains the information that is needed during the lifecycle of
the 440G-EZ electromagnetic safety switch.
This user manual must be made available to all people who work with the safety
switch. The structure of this user manual is based on the lifecycle phases of the
safety switch: project planning, mounting, electrical installation, commissioning,
operation, and maintenance.
Who Should Use This
Publication?
These operating instructions are intended for use by the following:
• Project developers (planners, developers, designers)
•Installers
•Electricians
• Safety experts (such as CE authorized representatives, compliance officers,
and people who test and approve the application)
•Operators
•Maintenance personnel
Terminology The following terms and abbreviations are used throughout this manual. For
definitions of terms not listed here, refer to the Allen-Bradley Industrial
Automation Glossary, publication AG-7.1.
Additional Resources These documents contain additional information concerning related products
from Rockwell Automation.
You can view or download publications at rok.auto/literature.
Term Definition
Dangerous state A status of the machine or facility, where people can be injured. Protective devices help prevent this
risk if the machine is operated within itsintended use.
The figures in this document always show the dangerous state of the machine as movement of a
machine part. In practice, there are different dangerous states, such as:
• Machine movements
•Electricalparts
• Visible and invisible beam
• A combination of multiple hazards
Resource Description
440G-EZ Interlocking Safety Switch Installation
Instructions, publication 440G-IN019 Provides installation information for 440G-EZ
switches.
Industrial AutomationWiring and Grounding Guidelines,
publication 1770-4.1 Provides general guidelines for installing a Rockwell Automation® industrial system.
Product Certifications website: rok.auto/certifications Provides declarations of conformity, certificates, and
other certification details.

6Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Preface
Notes:

Rockwell Automation Publication 440G-UM003A-EN-P - February 2020 7
Chapter 1
Safety Information
Introduction This chapter contains general safety information about the safety switch.
Further information about specific product use situations can be found in the
relevant chapters.
Intended Use The 440G electromagnetic safety switch is a transponder safety switch with a
locking function, which is controlled without contact by actuators and is suitable
for the following applications:
• Monitoring of movable physical guards
• Locking device for process protection
The safety switch must only be used within the limits of the prescribed and
specified technical data and operating conditions.
Incorrect use, improper modification of, or tampering with the safety switch
invalidates any warranty from Rockwell Automation; in addition, any
responsibility and liability of Rockwell Automation for damage and secondary
damage that this action causes is excluded.
The safety switch is not suitable for the ambient conditions such as, but not
limited, to the following:
• Applications in which the dangerous state cannot be ended immediately
(stopping time)
• Radioactivity (exception: natural radioactivity)
•Vacuum or high pressure
• High UV load
• In the vicinity of low-frequency RFID devices
• In the vicinity of magnetic fields
ATTENTION: Hazard due to lack of effectiveness of the protective device
If non-compliant, it is possible that the dangerous state of the machine may not be
stopped or not stopped in a timely manner.
• Read this publication carefully and make sure that you understand the content
fully before working with the device.
• Follow all safety notes in this publication.

8Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Chapter 1 Safety Information
Requirements for Qualified
Personnel
Only qualified safety personnel can configure, mount, connect, commission, and
service the safety switch.
Project Planning
For project planning, a person is considered competent when they have expertise
and experience in the selection and use of protective devices on machines and is
familiar with the relevant technical rules and national work safety regulations.
Mechanical Mounting, Electrical Installation, and Commissioning
For the task, a person is considered qualified when they have the expertise and
experience in the relevant field and is sufficiently familiar with the application of
the protective device on the machine to be able to assess whether it is in an
operationally safe state.
Operation and Maintenance
For operation and maintenance, a person is considered competent when they
have the expertise and experience in the relevant field and is sufficiently familiar
with the application of the protective device on the machine and the machine
operator has instructed them in its operation.
ATTENTION: Improper use of the safety switch
If a voltage drop occurs, the locking device unlocks regardless of whether the
dangerous state of the machine has ended.
This safety switch has a simple electromagnetic locking device. There is no locking
device monitoring.
• Do not use the safety switch as a safety locking device according to EN 14119.
• Do not use the safety switch in applications in which the dangerous state
cannot be ended immediately (stopping/run-down time).
IMPORTANT Passing metal chips may impair the function of the safety switch.

Rockwell Automation Publication 440G-UM003A-EN-P - February 2020 9
Chapter 2
Product Overview
Structure and Function The safety switch is an interlocking device with a locking device consisting of a
non-contact sensor with locking solenoid and a coded actuator. The actuator has
a low coding level.
If the protective device is closed, the actuator is led to the sensor. When the
actuation field is reached, the actuator code is read out and evaluated by RFID. If
the code is valid, the safe output signal switching device (OSSD) switches.
If the locking solenoid is supplied with power, the locking device is active.
Product Features Figure 1 - Sensor Overview
Item Description
1 Locking solenoid
2 Sensor surface
3Coverplate
4PlugconnectorIN
5 LOCK light-emitting diode (LED)
6OSSDLED
123
4
65

10 Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Chapter 2 Product Overview
Figure 2 - Actuator Overview
Product Models
The safety switch is available in different models. The following is an overview of
unique features of the models:
• One cable with M12 plug connector (5-pin)
• One cable with M12 plug connector (8-pin)
Locking Principle
Power to Lock Principle
• Lock locking device: voltage at locking device input
• Unlock locking function: no voltage at locking device input
If voltage is interrupted, the locking device is unlocked and the protective device
can be opened immediately.
The locking device is not monitored, which means that the safety switch does not
check whether the anchor plate is applied to the solenoid.
Item Description
1 Anchor plate
2Protectivecap
3Actuatorsurface
ATTENTION: Hazard due to lack of effectiveness of the protective device.
If a voltage drop occurs, the locking device unlocks regardless of whether the
dangerous state of the machine has ended.
• Do not use the safety switch in applications where the dangerous state cannot
be ended immediately (stopping/run-down time).
123

Rockwell Automation Publication 440G-UM003A-EN-P - February 2020 11
Product Overview Chapter 2
Protective Functions
The safety switch has the following internal protective functions:
• Short-circuit protection at all outputs
• Cross-circuit monitoring at OSSDs
• Overload protection on OSSDs
• Supply voltage reverse polarity protection
Status Indicators
The safety switch displays important status information with the status
indicators.
Figure 3 - Status Indicators
Item Name Color Description
1 OSSD Green/Red Green whenthe OSSD pair is in the ON state.
Red when the OSSD pair is in the OFF state. (1)
(1) When a load is applied to the application diagnostic output that is too high, the red OSSD status indicator remains continuously ON.
The actual switching behavior of the safety switch is not affected.
2 LOCK Yellow Turns ON when the magnet is supplied with voltage.
21

12 Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Chapter 2 Product Overview
Notes:

Rockwell Automation Publication 440G-UM003A-EN-P - February 2020 13
Chapter 3
Project Planning
Manufacturer of the
Machine
Operating Entity of the
Machine
ATTENTION: Failure to comply with obligations of manufacturer.
Hazard due to lack of effectiveness of the protective device.
• Conduct a risk assessment before using the safety switch.
• Do not tamper with, open, or modify the components of the safety switch.
• Do not repair defective devices – they must be replaced instead.
• Make sure that switch-on commands, which bring about a dangerous state of
the machine, are not enabled until the protective device is closed.
• Make sure that a stop command is triggered when the protective device is
opened during the dangerous machine state.
• The safety switches must not be defeated (that is, contacts jumpered), rotated
away, removed, or rendered ineffective in any other way. If necessary, put
measures in place to reduce possibilities for defeat.
ATTENTION: Failure to comply with obligations of the operating entity.
Hazard due to lack of effectiveness of the protective device.
• Modifications to the machine and modifications to the mechanical mounting of
the safety switch necessitate a new risk assessment.The results of this risk
assessment may require the operating entity of the machine to fulfill the
obligations of the manufacturer.
• Apart from during the procedures described in this document, the components
of the safety switch must not be opened or modified.
• Do not perform repair work on the components. Improper repair of the safety
switch can lead to a loss of the protective function.
• Verify that there is no bypassing by replacement actuators. Restrict access to
actuators.

14 Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Chapter 3 Project Planning
Assembly
Mounting Location
• Select the mounting location so that the sensor and actuator are accessible
for maintenance work and are protected against damage.
• Select a mounting location for the sensor that is as far away from the door
hinge as possible.
• If necessary, fit an additional stop for the moving protective device.
Distance
When several safety switches are mounted to the machine, they must be mounted
at a minimum distance to one another see Mount Multiple Safety Switches on
page 19
Alignment
The safety switch can be mounted in any alignment. When mounted
horizontally, the anchor plate with rotating bearings increases the manipulation
protection. When mounted horizontally, if the movable physical guard triggers
the actuator, the magnet holds the actuator. As the anchor plate has rotating
bearings, the gravitational force rotates the actuator surface away from the sensor
surface and the OSSDs go into the OFF state.
Mounting Methods
The sensor can be mounted in the following ways:
• Surface mount: The sensor is mounted on the fixed part of the protective
device (for example, door frame).
•Flush mount
(1): The sensor is mounted in the fixed part of the protective
device (for example, door frame). There must be a suitable recess in the
mounting surface. The thickness of the mounting surface must be
1.5…3 mm (0.06…0.12 in.).
ATTENTION: Bypassing the protective device.
Hazard due to lack of effectiveness of the protective device.
Avoid incentives to manipulate the safety switch by taking at least one of the
following measures:
• Cover the sensor and the actuator with additional equipment or protect them
against access.
• If possible use permanent mounting methods for actuators (for example, glue,
safety screws, or rivets).
(1) For the recess dimensions for flush mounting, see Figure 12 on page 34

Rockwell Automation Publication 440G-UM003A-EN-P - February 2020 15
Project Planning Chapter 3
Electrical Control
Integration
Switch-on commands that put the machine in a dangerous state can only be
activated when the protective device is closed. When the machine goes into a
dangerous state, a stop command must be triggered if the protective device is
opened. Depending on the safety concept, a safety relay or a safety controller
analyzes the signal.
The control that is connected and all devices responsible for safety must comply
with the required Performance Level and the required category (for example,
according to ISO 13849-1).
OSSDs
Safety switches with local inputs and outputs can be directly integrated into the
machine controller.
• The output signals from an OSSD pair must not be connected to each
other.
• In the machine controller, both signals from an OSSD pair must be
processed separately.
Figure 4 - Dual-channel and isolated connection of OSSD 1 and OSSD 2
• The machine must switch to the safe state at any time if at least one OSSD
in an OSSD pair switches to the OFF state.
• Prevent the formation of a potential difference between the load and the
protective device. If you connect loads to the OSSDs (safety outputs) that
then also switch if controlled with negative voltage (for example,
electromechanical contactor without reverse polarity protection diode),
you must connect the 0V connections of these loads and the connections
of the corresponding protective device individually and directly to the
same 0V terminal strip. If there is a fault, this way verifies that there can be
no potential difference between the 0V connections of the loads and the
connections of the corresponding protective device.
ATTENTION: Hazard due to lack of effectiveness of the protective device.
If non-compliant, it is possible that the dangerous state of the machine may not be
stopped or not stopped in a timely manner.
• Make sure that the following control and electrical requirements are met so the
protective function can be fulfilled.

16 Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Chapter 3 Project Planning
Figure 5 - No Potential Difference Between Load and Protective Device
Requirements for the Electrical Control of the Machine
• Use the control without test pulses. The safety switch is self-testing.
• The safety switch tests the OSSDs at regular intervals. To conduct this
test, it switches each OSSD briefly (for max. 1 ms) to the OFF state and
checks whether this channel is voltage-free during this time.
Make sure that the control of the machine does not react to these test
pulses and the machine does not switch off.
• The inputs of a connected evaluation unit must be positive-switching
(PNP), as the two outputs of the safety switch send a level of the supply
voltage in the switched on state.
The OSSDs are short-circuit protected to 24V DC and 0V. When the actuator is
in the response range of the sensor, the OSSDs signal the ON state with the
HIGH signal level (nonisolated). If the actuator is removed from the response
range of the sensor or there is a device fault, the OSSDs signal the OFF state with
the LOW signal level.
The safety switch complies with the regulations for electromagnetic
compatibility (EMC) for the industrial sector (Radio Safety Class A). Radio
interference cannot be ruled out when used in residential areas.
ATTENTION: Hazard due to lack of effectiveness of the protective device.
If non-compliant, it is possible that the dangerous state of the machine may not be
stopped or not stopped in a timely manner.
Downstream contactors must be positively guided and monitored depending on
applicable national regulations or required reliability of the safety function.
• Make sure that downstream contactors are monitored (external device
monitoring, EDM).
ATTENTION: Hazard due to lack of effectiveness of the protective device.
If non-compliant, it is possible that the dangerous state of the machine may not be
stopped or not stopped in a timely manner.
• Make sure that the following control and electrical requirements are met so the
safety switch can fulfill its protective function.

Rockwell Automation Publication 440G-UM003A-EN-P - February 2020 17
Project Planning Chapter 3
• The external voltage supply of the safety switch must be able to withstand
brief power failures of 20 ms as specified in IEC 60204-1.
• The power supply unit must provide safe isolation according to IEC
61140 (SELV/PELV). We have suitable power supplies available as
accessories, contact your local Allen-Bradley distributor or
Rockwell Automation sales office.
Course of the OSSD Test Over Time
Figure 6 - Course of the OSSD test over time
(1) Usually every 40 ms.The interval is dynamic and can be smaller than 40 ms.
Locking Solenoid Control
The locking solenoid is activated through the upstream control. There is no
internal activation or deactivation of the locking solenoid through the safety
switch. The locking device and locking force are not monitored. When the
machine starts, the following sequence must be followed:
1. Check whether safety switch OSSDs are in the ON state.
2. Supply the locking solenoid with power.
3. Start the machine.
Application Diagnostic Output
The application diagnostic output signal changes as soon as the actuator is moved
into or out of the response range of the safety switch. That is, when the movable
protective device is opened or closed. This output is not a safety output.
For more information, see Specifications on page 31.
Table 1 - Switching Behavior of the Application Diagnostic Output
Actuator Application Diagnostic Output
Actuator not in the response area, or safety switch in an error state OFF
Actuator in the response area ON
OSSD 1
V
t
OSSD 2
V
t
300 μs
300 μs
(1)

18 Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Chapter 3 Project Planning
Thorough-check Concept Appropriately qualified safety personnel must test the safety switch during
commissioning, after modifications, and at regular intervals; see Thorough-
check Requirements on page 27.
Regular thorough checks serve to investigate the effectiveness of the safety switch
and discover anomalies that result from modifications or external influences
(such as damage or manipulation).
The manufacturer and operating entity must define the type and frequency of the
thorough checks on the machine based on the application conditions and the risk
assessment. The process of defining the thorough checks must be documented in
a traceable manner.
Regular Thorough Check Minimum Requirements
The following thorough checks must be conducted at least once a year:
• Thorough check of the protective function of the safety switch
• Thorough check of the switch housing for damage
• Thorough check of the switch cables for damage
• Thorough check of the safety switch for signs of misuse or manipulation
• Thorough check of the locking solenoid for correct function

Rockwell Automation Publication 440G-UM003A-EN-P - February 2020 19
Chapter 4
Installation
Mount Multiple Safety
Switches
Figure 7 - Spacing Requirement
Mounting The sensor can be mounted in the following ways:
• Surface mount — The sensor is mounted on the fixed part of the
protective device (for example, door frame).
• Flush mount — The sensor is mounted in the fixed part of the protective
device (for example, door frame). There must be a suitable recess in the
mounting surface. The thickness of the mounting surface must be between
1.5…3 mm (0.06…0.12 in.)
For recess dimensions for flush mounting, see Figure 12 on page 34
IMPORTANT When several safety switches are mounted, the minimum distance between
the individual systems must be followed to avoid mutual interference.
260 (10.24)
260
(10.24)
IMPORTANT Install the safety switch horizontally to help increase protection against
manipulation.

20 Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Chapter 4 Installation
Mount the Sensor
1. Unscrew the fixing screw (hexagon socket, 2 mm [0.08 in.]) and remove
the cover plate.
2. Mount the sensor on the fixed part of the protective device with 4 x M4
screws and secure it with four nuts.
• For surface mount: mount the sensor on the fixed part of the protective
device. The screws can be set in the front or the back.
Tightening torque: 1 N•m