Beckhoff EP1918-0002 User manual

Operating Instructions | EN
EP1918-0002 and EP1918-2202
TwinSAFE EtherCAT Box with 8 fail-safe inputs
2023-03-07 | Version: 2.0.0

Table of contents
EP1918-0002 and EP1918-2202 3Version: 2.0.0
Table of contents
1 Notes on the documentation....................................................................................................................5
1.1 Disclaimer..........................................................................................................................................5
1.1.1 Trademarks........................................................................................................................5
1.1.2 Patents...............................................................................................................................5
1.1.3 Limitation of liability............................................................................................................6
1.1.4 Copyright............................................................................................................................6
1.2 Documentation issue status ..............................................................................................................7
1.3 Version history of the TwinSAFE product .........................................................................................8
1.4 Staff qualification...............................................................................................................................8
1.5 Safety and instruction........................................................................................................................9
1.5.1 Explanation of symbols ......................................................................................................9
1.6 Beckhoff Support and Service.........................................................................................................10
2 For your safety ........................................................................................................................................11
2.1 Duty of care.....................................................................................................................................11
2.2 Safety image signs..........................................................................................................................12
2.3 General safety instructions..............................................................................................................13
2.3.1 Before operation...............................................................................................................13
2.3.2 In operation ......................................................................................................................13
2.3.3 After operation..................................................................................................................13
3 System description .................................................................................................................................14
3.1 EtherCAT Box Modules...................................................................................................................14
4 Product description ................................................................................................................................15
4.1 EP1918-0002 & EP1918-2202........................................................................................................15
4.2 Intended use ...................................................................................................................................16
4.3 Technical data.................................................................................................................................17
4.4 Safety parameters...........................................................................................................................19
4.5 Safe inputs ......................................................................................................................................19
4.6 Dimensions .....................................................................................................................................20
5 Operation .................................................................................................................................................21
5.1 Environmental conditions ................................................................................................................21
5.2 Installation .......................................................................................................................................21
5.2.1 Fixing................................................................................................................................21
5.2.2 Connection.......................................................................................................................21
5.2.3 Temperature measurement..............................................................................................28
5.2.4 Signal cables....................................................................................................................29
5.3 Configuration of the EtherCAT Box in TwinCAT .............................................................................31
5.3.1 Adding an EtherCAT device.............................................................................................31
5.3.2 Inserting an EP1918.........................................................................................................31
5.3.3 EP1918-0002: using the integrated TwinSAFE Logic functions.......................................31
5.3.4 Address settings on the TwinSAFE EtherCAT Box..........................................................33
5.3.5 Alias devices ....................................................................................................................34
5.3.6 Parameters of the EP1918...............................................................................................36
5.3.7 Process image of the EP1918..........................................................................................38

Table of contents
EP1918-0002 and EP1918-22024 Version: 2.0.0
5.4 TwinSAFE reaction times................................................................................................................40
5.5 Diagnosis ........................................................................................................................................42
5.5.1 EtherCAT- Fieldbus LEDs................................................................................................42
5.5.2 Status LEDs .....................................................................................................................43
5.5.3 Diagnostic LEDs...............................................................................................................44
5.5.4 Flash code display ...........................................................................................................45
5.5.5 Diagnostic objects............................................................................................................45
5.5.6 Cycle time of the safety project........................................................................................47
5.5.7 Diag History tab................................................................................................................47
5.5.8 Diagnosis History .............................................................................................................49
6 Service life ...............................................................................................................................................52
7 Maintenance and cleaning .....................................................................................................................53
8 Decommissioning ...................................................................................................................................54
8.1 Disposal ..........................................................................................................................................54
8.1.1 Returning to the vendor....................................................................................................54
9 Appendix..................................................................................................................................................55
9.1 Protection classes according to IP code .........................................................................................55
9.2 Volatility...........................................................................................................................................56
9.3 Focus of certificates ........................................................................................................................57
9.4 Certificate ........................................................................................................................................58

Notes on the documentation
EP1918-0002 and EP1918-2202 5Version: 2.0.0
1 Notes on the documentation
1.1 Disclaimer
Beckhoff products are subject to continuous further development. We reserve the right to revise the
operating instructions at any time and without prior announcement. No claims for the modification of products
that have already been supplied may be made on the basis of the data, diagrams and descriptions in these
operating instructions.
In these operating instructions we define all permissible use cases whose properties and operating
conditions we can guarantee. The use cases we define are fully tested and certified. Use cases beyond this,
which are not described in these operating instructions, require the approval of Beckhoff Automation GmbH
& Co KG.
1.1.1 Trademarks
Beckhoff®, TwinCAT®, EtherCAT®, EtherCAT G®, EtherCAT G10®, EtherCAT P®, Safety over EtherCAT®,
TwinSAFE®, XFC®, XTS® and XPlanar® are registered and licensed trademarks of Beckhoff Automation
GmbH.
The use of other brand names or designations by third parties may lead to an infringement of the rights of
the owners of the corresponding designations.
1.1.2 Patents
The EtherCAT technology is protected by patent rights through the following registrations and patents with
corresponding applications and registrations in various other countries:
• EP1590927
• EP1789857
• EP1456722
• EP2137893
• DE102015105702
EtherCAT® is a registered trademark and patented technology,
licensed by Beckhoff Automation GmbH.
Safety over EtherCAT® is a registered trademark and patented
technology, licensed by Beckhoff Automation GmbH.

Notes on the documentation
EP1918-0002 and EP1918-22026 Version: 2.0.0
1.1.3 Limitation of liability
All components in this product as described in the operating instructions are delivered in a specific
configuration of hardware and software, depending on the application regulations. Modifications and
changes to the hardware and/or software configuration that go beyond the documented options are
prohibited and nullify the liability of Beckhoff Automation GmbH & Co. KG.
The following is excluded from the liability:
• Failure to observe these operating instructions
• Improper use
• Use of untrained personnel
• Use of unauthorized spare parts
1.1.4 Copyright
© Beckhoff Automation GmbH & Co. KG, Germany.
The distribution and reproduction of this document as well as the use and communication of its contents
without express authorization are prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a
patent, utility model or design.

Notes on the documentation
EP1918-0002 and EP1918-2202 7Version: 2.0.0
1.2 Documentation issue status
Version Comment
3.0.0 • Foreword changed to Notes on the documentation [}5] and For your safety [}11]
•Service life [}52] moved
•Maintenance and cleaning [}53] and Decommissioning [}54] adapted
• Appendix adapted and expanded
1.2.2 • Typo in Technical data [}17] corrected
1.2.1 • Corrections
1.2.0 • In chapter Technical data [}17] link to download page of certificates added
• Chapter "Firmware update of TwinSAFE products" removed
• I/O component EP1918-2202 added as variant of EP1918-0002
• Chapter Project design limits of the EP1918 [}32] moved
1.1.0 • Chapter Temperature measurement [}28] updated
1.0.0 • First release
0.4 • Technical data for sensor supply updated
• Technical data for current consumption updated
0.3 • Technical data updated
0.2 • Note on commissioning test added
• Version history of the TwinSAFE product added
• Note on safe inputs added
0.1 • First draft
Currentness
Please check whether you are using the current and valid version of this document. The current version can
be downloaded from the Beckhoff homepage at http://www.beckhoff.de/twinsafe. In case of doubt, please
contact Technical Support (see Beckhoff Support and Service [}10]).
Origin of the document
The original documentation is written in German. All other languages are derived from the German original.
Product features
Only the product properties specified in the current operating instructions are valid. Further information given
on the product pages of the Beckhoff homepage, in emails or in other publications is not authoritative.

Notes on the documentation
EP1918-0002 and EP1918-22028 Version: 2.0.0
1.3 Version history of the TwinSAFE product
This version history lists the software and hardware version numbers. A description of the changes
compared to the previous version is also given.
Updated hardware and software
TwinSAFE products are subject to a cyclical revision. We reserve the right to revise and change the
TwinSAFE products at any time and without prior notice.
No claims for changes to products already delivered can be asserted from these hardware and/or
software changes.
Date Software ver-
sion
Hardware ver-
sion
Modifications
First release of the EP1918-2202
19/05/2020 01 00 First release of the EP1918-0002
1.4 Staff qualification
These operating instructions are intended exclusively for trained specialists in control technology and
automation with the relevant knowledge.
The trained specialist personnel must ensure that the applications and use of the described product meet all
safety requirements. This includes all applicable and valid laws, regulations, provisions and standards.
Trained specialists
Trained specialists have extensive technical knowledge from studies, apprenticeships or technical training.
Understanding of control technology and automation is available. Trained specialists can:
• Independently identify, avoid and eliminate sources of hazard.
• Apply relevant standards and directives.
• Implement specifications from accident prevention regulations.
• Evaluate, prepare and set up the workplaces.
• Evaluate, optimize and execute work independently.

Notes on the documentation
EP1918-0002 and EP1918-2202 9Version: 2.0.0
1.5 Safety and instruction
Read the contents that refer to the activities you have to perform with the product. Always read the chapter
For your safety [}11] in the operating instructions.
Observe the warnings in the chapters so that you can handle and work with the product as intended and
safely.
1.5.1 Explanation of symbols
Various symbols are used for a clear arrangement:
1. The numbering indicates an action that should be taken.
• The bullet point indicates an enumeration.
[…] The square brackets indicate cross-references to other text passages in the document.
[1] The number in square brackets indicates the numbering of a referenced document.
1.5.1.1 Pictograms
In order to make it easier for you to find text passages, pictograms and signal words are used in warning
notices:
DANGER
Failure to observe will result in serious or fatal injuries.
WARNING
Failure to observe may result in serious or fatal injuries.
CAUTION
Failure to observe may result in minor or moderate injuries.
NOTE
Notes
Notes are used for important information on the product. The possible consequences of failure to observe
these include:
• Malfunctions of the product
• Damage to the product
• Damage to the environment
Information
This sign indicates information, tips and notes for dealing with the product or the software.

Notes on the documentation
EP1918-0002 and EP1918-220210 Version: 2.0.0
1.6 Beckhoff Support and Service
Support
Beckhoff Support offers technical advice on the use of individual Beckhoff products and system planning.
The employees support you in the programming and commissioning of sophisticated automation systems.
Hotline: [phone]
E-mail: [email protected]
Web: www.beckhoff.com/support
Training
Training in Germany takes place in our training center at the Beckhoff headquarters in Verl, at subsidiaries
or, by arrangement, at the customer's premises.
Hotline: [phone]
E-mail: [email protected]
Web: www.beckhoff.com/training
Service
The Beckhoff Service Center supports you with after-sales services such as on-site service, repair service or
spare parts service.
Hotline: [phone]
E-mail: [email protected]
Web: www.beckhoff.com/service
Download area
In the download area you can obtain product information, software updates, the TwinCAT automation
software, documentation and much more.
Web: www.beckhoff.com/download
Headquarters
Beckhoff Automation GmbH & Co. KG
Hülshorstweg 20
33415 Verl
Germany
Phone: [phone]
E-mail: [email protected]
Web: www.beckhoff.com
For the addresses of our worldwide locations, please visit our website at Global Presence.

For your safety
EP1918-0002 and EP1918-2202 11Version: 2.0.0
2 For your safety
Read this chapter containing general safety information. In addition, always observe the safety instructions
and warnings in these operating instructions for your own safety, the safety of other persons and the safety
of the product.
When working with control and automation products, many dangers can result from careless or incorrect use.
Work particularly thoroughly, not under time pressure and responsibly towards other people.
2.1 Duty of care
Read entire documentation for TwinSAFE component
• TwinSAFE application manual
• EL6910 TwinSAFE logic terminal operating manual
• TwinSAFE Logic FB documentation manual
The operator must comply with all the requirements and notes specified in these operating instructions in
order to fulfill his duty of care. This includes in particular that you
• comply with the provisions defined in the chapter Limitation of liability [}6].
• only operate the TwinSAFE component when it is in perfect working order.
• provide the operating instructions in a legible condition and complete at the place of use of the
TwinSAFE component.
• do not remove the safety markings attached to the TwinSAFE component and maintain their legibility.
No disposal in domestic waste
Products marked with a crossed-out waste bin must not be disposed of with domestic
waste. The device is considered waste electrical and electronic equipment when it is
disposed of. Observe the national regulations for the disposal of waste electrical and
electronic equipment.

For your safety
EP1918-0002 and EP1918-220212 Version: 2.0.0
2.2 Safety image signs
On Beckhoff products you will find attached or lasered safety pictograms, which vary depending on the
product. They serve to serve to ensure safety for people and to prevent damage to the products. Safety
pictograms must not be removed and must be legible for the user.
Read and observe the operating instructions
Commissioning is only permitted if the operating instructions have been read and understood
beforehand. This applies in particular to the safety instructions and warnings.
Electrostatic sensitive components
Work with and on the TwinSAFE component is only permitted in protected workplaces.

For your safety
EP1918-0002 and EP1918-2202 13Version: 2.0.0
2.3 General safety instructions
2.3.1 Before operation
Use in machines according to the Machinery Directive
Only use the TwinSAFE component in machines that comply with the Machinery Directive. This is how you
ensure safe operation.
Ensure traceability
Ensure the traceability of the TwinSAFE component via the serial number.
Use SELV/PELV power supply
Use a SELV/PELV power supply unit with an output-side voltage limit of Umax = 36VDC to supply the
TwinSAFE component with 24VDC.
Failure to observe this will endanger the safety function of the product. Depending on the machine, death
and danger to life, serious physical injury and damage to the machine may result.
Carry out commissioning test
Before commissioning, wiring faults to the sensors must be excluded. Before commissioning, carry out a
commissioning test. After a successful commissioning test, you can use the TwinSAFE component for the
intended safety-related task.
In case of wiring errors, the safety function of the product is at risk. Depending on the machine, death and
danger to life, serious bodily injury and damage to the machine may result.
Use permitted engineering tools and procedures
The TÜV SÜD certificate applies to the TwinSAFE component, the function blocks available in it, the
documentation and the engineering tool. TwinCAT 3.1 and the TwinSAFE Loader are permitted as
engineering tools.
Procedures or engineering tools deviating from this are not covered by the certificate. This applies in
particular to externally generated xml files for the TwinSAFE import.
2.3.2 In operation
Interference due to emitted interference
Do not operate the following devices in the vicinity of the TwinSAFE component: for example, radio
telephones, radios, transmitters or high-frequency systems.
TwinSAFE components comply with the requirements of the applicable electromagnetic compatibility
standards with regard to interference emission and immunity. If you exceed the limits for emitted interference
specified in the standards, the function of the TwinSAFE component may be impaired.
2.3.3 After operation
De-energize and switch off components before working on them
Check all safety-relevant equipment for functionality before working on the TwinSAFE component. Secure
the working environment. Secure the machine or plant against being inadvertently started up. Observe the
chapter Decommissioning [}54].

System description
EP1918-0002 and EP1918-220214 Version: 2.0.0
3 System description
3.1 EtherCAT Box Modules
The EtherCAT system has been extended with EtherCAT Box modules with protection class IP67. Through
the integrated EtherCAT interface the modules can be connected directly to an EtherCAT network without an
additional Coupler Box. The high-performance of EtherCAT is thus maintained into each module.
The extremely low dimensions of only e.g.126x30x26.5mm are identical to those of the Fieldbus Box
extension modules. They are thus particularly suitable for use where space is at a premium. The small mass
of the EtherCAT modules facilitates applications with mobile I/O interface (e.g. on a robot arm). The
EtherCAT connection is established via screened M8 connectors.
Fig.1: EtherCAT Box modules extend the EtherCAT system with IP67 protection
The robust design of the EtherCAT Box modules enables them to be used directly at the machine. Control
cabinets and terminal boxes are now no longer required. The modules are fully sealed and therefore ideally
prepared for wet, dirty or dusty conditions.
Pre-assembled cables significantly simplify EtherCAT and signal wiring. Very few wiring errors are made, so
that commissioning is optimized. In addition to pre-assembled EtherCAT, power and sensor cables, field-
configurable connectors and cables are available for maximum flexibility. Depending on the application, the
sensors and actuators are connected through M8 or M12 connectors.
Basic EtherCAT documentation
You will find a detailed description of the EtherCAT system in the Basic System Documentation for
EtherCAT, which is available for download from our website (www.beckhoff.com) under Downloads.

Product description
EP1918-0002 and EP1918-2202 15Version: 2.0.0
4 Product description
4.1 EP1918-0002 & EP1918-2202
The EP1918 TwinSAFE EtherCAT Box is a digital EtherCAT Box for sensors with potential-free contacts for
24VDC. It has eight fail-safe inputs.
The EP1918 meets the requirements of the following standards:
• EN 61508:2010 (SIL 3)
• EN 62061:2005/A2:2015 (SILCL3)
• EN ISO 13849-1:2015 (Cat.4,PLe)
Fig.2: EP1918 - TwinSAFE EtherCAT Box with 8 fail-safe inputs
EP1918 variants
The EP1918 has an integrated safety control that can be used for user-specific applications directly
on the component. The variant EP1918-2202 does not have this functionality and represents a pure
I/O component.

Product description
EP1918-0002 and EP1918-220216 Version: 2.0.0
4.2 Intended use
WARNING
Caution - Risk of injury!
TwinSAFE components shall only be used for the purposes described below!
The TwinSAFE EtherCAT Box expands the application range of the Beckhoff system with functions that
enable it to be used for machine safety applications. The TwinSAFE Boxes are designed for machine safety
functions and directly associated industrial automation tasks. They are therefore only approved for
applications with a defined fail-safe state. This safe state is the wattless state. Fail-safety according to the
relevant standards is required.
The TwinSAFE EtherCAT Box allows the connection of:
24VDC sensors such as
• emergency stop push buttons, rope pull switches, position switches, two-hand switches, safety mats,
light curtains, light barriers, laser scanners etc.
• Safe sensors, which use a 24VDC supply and send safe OSSD signals.
WARNING
The fail-safe principle!
The basic rule for a safety system such as TwinSAFE is that failure of a part, a system component or the
overall system must never lead to a dangerous condition. The safe state is always the switched off and
wattless state.
WARNING
Power supply from SELV/PELV power supply unit!
The TwinSAFE components must be supplied with 24VDC by an SELV/PELV power supply unit with an
output voltage limit Umax of 36VDC. Failure to observe this can result in a loss of safety.
WARNING
System limits
The TÜV SÜD certificate applies to this TwinSAFE component, the function blocks available in it, the
documentation and the engineering tool. TwinCAT 3.1 and the TwinSAFE Loader are permitted as
engineering tools. Any deviations from these procedures or tools, particularly externally generated xml files
for TwinSAFE import or externally generated automatic project creation procedures, are not covered by the
certificate.
WARNING
Commissioning test
Before the EP1918-0002 can be used for the safety task, the user must carry out a commissioning test so
that sensor and actuator wiring faults can be ruled out.
CAUTION
Follow the machinery directive!
The TwinSAFE components shall only be used in machines as defined in the machinery directive.
CAUTION
Ensure traceability!
The buyer has to ensure the traceability of the device via the serial number.

Product description
EP1918-0002 and EP1918-2202 17Version: 2.0.0
4.3 Technical data
The current certificates of all TwinSAFE products with the underlying standards and directives can be found
at https://www.beckhoff.com/en-en/support/download-finder/certificates-approvals/.
Product designation EP1918-0002 and EP1918-2202
Fieldbus EtherCAT
Number of inputs 8
Connecting the inputs 12M
Status display 8 (one green LED per input), 5 diagnostic LEDs, 2 LEDs for Us/Up,
2 LEDs for EtherCAT Link/Act
Response time
(read input/write to E-bus)
typically: 3ms,
maximum: see fault reaction time
Watchdog time adjustable from 2ms to 60s
Fault reaction time ≤ watchdog time
Cable length between sensor and EtherCAT Box Unshielded: max. 100m (0.75 or 1mm²)
Shielded: max. 100m (0.75 or 1mm²)
Output current of the clock outputs
(Input Power Mode parameter: diag test pulse)
typically 10mA
Output current of sensor supply
(Input Power Mode parameter: PowerMode A/B)
max. 250mA
Max. output current clock outputs/sensor supply in the
event of an error
max. 3A (the duration depends on the overtemperature-related shutdown of
the output driver)
Input process image 7bytes (via FSoE if using the default project)
Output process image 6bytes (via FSoE if using the default project)
Supply voltage for the EP1918 24VDC (–15%/+20%)
Current consumption US
(wired with 8 potential-free contacts)
8 channels occupied: typically 100mA
0 channels occupied: typically 91mA
(provide a 4A fuse)
Current consumption US
(wired with 8 potential-free contacts)
8 channels occupied: approx. 60mA
0 channels occupied: approx. 35mA
(provide a 4A fuse)
Power loss of the EtherCAT Box typically 3.8watts
Electrical isolation (between the channels) no
Electrical isolation
(between the channels and EtherCAT)
yes
Insulation voltage (between the channels and
EtherCAT, under common operating conditions)
Insulation tested with 500VDC
Dimensions (WxHxD) 30 mm x 126 mm x 26.5 mm
Housing material PA66-GV 30 (WELLAMID)
Flame Class: V-0
Sealing compound Polyurethane PU552L
Flame Class: V-0
Weight approx.170g
Permissible ambient temperature
(operation)
-25°C to +60°C
Permissible ambient temperature
(transport/storage)
-40°C to +85°C
Permissible air pressure
(operation/storage/transport)
750hPa to 1100hPa
(this is equivalent to an altitude of approx. -690m to 2450m above sea level
assuming an international standard atmosphere)
Inadmissible operating conditions TwinSAFE EtherCAT Boxes must not be used under the following conditions:
• under the influence of ionizing radiation (exceeding the natural
background radiation)
• in corrosive environments
EMC immunity/emission conforms to EN61000-6-2/ EN61000-6-4 (EMC ZoneB)
Vibration resistance conforms to EN60068-2-6
5 Hz ≤ f < 8.4 Hz (3.5 mm peak)
8.4 Hz ≤ f < 150 Hz (10 m/s2 peak)
Shock resistance conforms to EN60068-2-27
15g with pulse duration 11ms in all three axes
Protection rating (when screwed together) IP67 (according to EN60529)
Correct installation position variable
Approvals CE, TÜV SÜD

Product description
EP1918-0002 and EP1918-220218 Version: 2.0.0
Derating table for altitudes above 2000m
The derating table (table 8) from the IEC61131-2:2017 standard can be referred to for the use of the
TwinSAFE components above the specified maximum altitude.
Altitude in m Derating factor for the temperature1
0 to 200021.0
3000 0.9
4000 0.8
5000 0.7
Note: Linear interpolation is permissible between the altitudes
1) Ambient temperature of the device at an altitude of 2000m
2) The air pressure and air density increase as the altitude decreases. Therefore the derating factor for 0 to
2000 m (1.0) is used for altitudes below sea level.
Calculation example
In the following example the calculation is performed for a TwinSAFE component at an operating altitude of
4000m.
Permissible ambient temperature up to 2000 m above sea level = 55°C
Permissible ambient temperature up to 4000m above sea level = 55°C * 0.8 = 44°C
CAUTION
Compliance with the temperature limits
The TwinSAFE component has a maximum internal temperature at which a switch-off takes place. This is
designed for the maximum permissible ambient temperature. If the derating factor for the temperature for
higher altitudes is used, the user is solely responsible for ensuring that the calculated maximum ambient
temperature is complied with.

Product description
EP1918-0002 and EP1918-2202 19Version: 2.0.0
4.4 Safety parameters
Key data EP1918-0002 and EP1918-2202
Lifetime [a] 20
Proof test interval [a] not required1
PFHD5.00E-09
PFD 6.90E-05
MTTFDhigh (875a)
DC high (98.6% CAT 4)
Performance level PL e
Category 4
HFT 1
Classification element2Type B
1) Special proof tests are not required during the entire service life of the EtherCAT Box.
2) Classification according to EN 61508-2:2010 (see chapter 7.4.4.1.2 and 7.4.4.1.3)
The TwinSAFE EtherCAT Box can be used for safety-related applications within the meaning of
IEC61508:2010 and IEC 62061 up to SIL3 and ENISO13849-1:2015 up to PLe(Cat4).
Further information on calculating or estimating the MTTFD value from the PFHD value can be found in the
TwinSAFE Application Guide or in ENISO13849-1:2015, TableK.1.
In terms of safety-related parameters, the Safety-over-EtherCAT communication is already considered with
1% of SIL3 according to the protocol specification.
4.5 Safe inputs
The safe input modules and corresponding clock outputs have a two-channel design. This has the
advantage that a two-channel safe sensor with an M12 connection can be used, and a fault such as cross-
circuit or external feed results in shutdown of the whole module.
DANGER
Clocked signals inside a sheathed cable
If clocked signals (clock outputs for the safe inputs) of different modules are used within a sheathed cable,
a fault of one module, such as cross-circuit or external feed, must lead to the switch-off of all of these
modules. This is achieved by setting the Module Fault Link active parameter for all modules involved. This
parameter is set to TRUE by default.
DANGER
Safe inputs in Cat.4 / PL e
If two safe input channels are to be used in a category 4 structure that are not on one M12 connector,
please make sure to combine always an even and an odd channel number.

Product description
EP1918-0002 and EP1918-220220 Version: 2.0.0
4.6 Dimensions
Fig.3: Dimensions
The TwinSAFE EtherCAT Box has the following dimensions.
Width 30.0mm
Height 126.0mm
Depth 26.5mm
When fully wired, the connected cables increase the total depth of the module.