Beckhoff EP2918-0032 User manual

Operating Instructions | EN
EP2918-0032 and EP2918-2232
TwinSAFE EtherCAT Box with 8 fail-safe outputs
2022-10-20 | Version: 1.2.0

Table of contents
EP2918-0032 and EP2918-2232 3Version: 1.2.0
Table of contents
1 Foreword....................................................................................................................................................5
1.1 Notes on the documentation .............................................................................................................5
1.2 Safety instructions.............................................................................................................................6
1.2.1 Delivery state .....................................................................................................................6
1.2.2 Operator's obligation to exercise diligence ........................................................................6
1.2.3 Description of instructions..................................................................................................7
1.3 Documentation issue status ..............................................................................................................8
1.4 Version history of the TwinSAFE product .........................................................................................8
2 System description ...................................................................................................................................9
2.1 EtherCAT Box Modules.....................................................................................................................9
3 Product description ................................................................................................................................10
3.1 EP2918-0032 and EP2918-2232 ....................................................................................................10
3.2 Intended use ...................................................................................................................................11
3.3 Technical data.................................................................................................................................11
3.4 Safety parameters...........................................................................................................................13
3.5 Safe output......................................................................................................................................14
3.6 Dimensions .....................................................................................................................................14
4 Operation .................................................................................................................................................15
4.1 Environmental conditions ................................................................................................................15
4.2 Installation .......................................................................................................................................15
4.2.1 Fixing................................................................................................................................15
4.2.2 Connection.......................................................................................................................15
4.2.3 Temperature measurement..............................................................................................21
4.2.4 Signal cables....................................................................................................................22
4.3 Configuration of the EtherCAT Box in TwinCAT .............................................................................24
4.3.1 Adding an EtherCAT device.............................................................................................24
4.3.2 Inserting an EP2918.........................................................................................................24
4.3.3 EP2918-0032: using the integrated TwinSAFE Logic functions.......................................24
4.3.4 Address settings on the TwinSAFE EtherCAT Box..........................................................26
4.3.5 Alias devices ....................................................................................................................27
4.3.6 EP2918 parameters .........................................................................................................29
4.3.7 Process image of the EP2918..........................................................................................32
4.4 TwinSAFE reaction times................................................................................................................33
4.5 Diagnostics......................................................................................................................................35
4.5.1 EtherCAT- Fieldbus LEDs................................................................................................35
4.5.2 Status LEDs .....................................................................................................................36
4.5.3 Diagnostic LEDs...............................................................................................................37
4.5.4 Flash code display ...........................................................................................................38
4.5.5 Diagnostic objects............................................................................................................38
4.5.6 Cycle time of the safety project........................................................................................40
4.5.7 Diag History tab................................................................................................................40
4.5.8 Diagnosis History .............................................................................................................41
4.6 Maintenance....................................................................................................................................44

Table of contents
EP2918-0032 and EP2918-22324 Version: 1.2.0
4.7 Service life.......................................................................................................................................45
4.8 Decommissioning............................................................................................................................45
5 Appendix..................................................................................................................................................46
5.1 Protection classes according to IP code .........................................................................................46
5.2 Support and Service........................................................................................................................47
5.3 Certificates ......................................................................................................................................48

Foreword
EP2918-0032 and EP2918-2232 5Version: 1.2.0
1 Foreword
1.1 Notes on the documentation
Intended audience
This description is only intended for the use of trained specialists in control and automation engineering who
are familiar with the applicable national standards.
It is essential that the following notes and explanations are followed when installing and commissioning
these components.
The responsible staff must ensure that the application or use of the products described satisfy all the
requirements for safety, including all the relevant laws, regulations, guidelines and standards.
Origin of the document
This is a translation of the original instructions which are written in German. All other languages are derived
from the German original.
Product features
Only the product features specified in the current user documentation are valid. Further information given on
the product pages of the Beckhoff homepage, in emails or in other publications is not authoritative.
Disclaimer
The documentation has been prepared with care. The products described are subject to cyclical revision. For
that reason the documentation is not in every case checked for consistency with performance data,
standards or other characteristics. We reserve the right to revise and change the documentation 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 this documentation.
Trademarks
Beckhoff®, TwinCAT®, TwinCAT/BSD®, TC/BSD®, EtherCAT®, EtherCATG®, EtherCATG10®, EtherCATP®,
SafetyoverEtherCAT®, TwinSAFE®, XFC®, XTS® and XPlanar® are registered trademarks of and licensed by
Beckhoff Automation GmbH. Other designations used in this publication may be trademarks whose use by
third parties for their own purposes could violate the rights of the owners.
Patent Pending
The EtherCAT Technology is covered, including but not limited to the following patent applications and
patents: EP1590927, EP1789857, EP1456722, EP2137893, DE102015105702 with corresponding
applications or registrations in various other countries.
EtherCAT® and Safety over EtherCAT® are registered trademarks and patented technologies, licensed by
Beckhoff Automation GmbH, Germany.

Foreword
EP2918-0032 and EP2918-22326 Version: 1.2.0
Copyright
© Beckhoff Automation GmbH & Co. KG, Germany.
The reproduction, distribution and utilization of this document as well as the communication of its contents to
others 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.
Delivery conditions
In addition, the general delivery conditions of the company Beckhoff Automation GmbH & Co. KG apply.
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 Services).
1.2 Safety instructions
1.2.1 Delivery state
All the components are supplied in particular hardware and software configurations appropriate for the
application. Modifications to hardware or software configurations other than those described in the
documentation are not permitted, and nullify the liability of Beckhoff Automation GmbH & Co. KG.
1.2.2 Operator's obligation to exercise diligence
The operator must ensure that
• the TwinSAFE products are only used as intended (see chapter Product description);
• the TwinSAFE products are only operated in sound condition and in working order.
• the TwinSAFE products are operated only by suitably qualified and authorized personnel.
• the personnel is instructed regularly about relevant occupational safety and environmental protection
aspects, and is familiar with the operating instructions and in particular the safety instructions contained
herein.
• the operating instructions are in good condition and complete, and always available for reference at the
location where the TwinSAFE products are used.
• none of the safety and warning notes attached to the TwinSAFE products are removed, and all notes
remain legible.

Foreword
EP2918-0032 and EP2918-2232 7Version: 1.2.0
1.2.3 Description of instructions
In these operating instructions the following instructions are used.
These instructions must be read carefully and followed without fail!
DANGER
Serious risk of injury!
Failure to follow this safety instruction directly endangers the life and health of persons.
WARNING
Risk of injury!
Failure to follow this safety instruction endangers the life and health of persons.
CAUTION
Personal injuries!
Failure to follow this safety instruction can lead to injuries to persons.
NOTE
Damage to the environment/equipment or data loss
Failure to follow this instruction can lead to environmental damage, equipment damage or data loss.
Tip or pointer
This symbol indicates information that contributes to better understanding.

Foreword
EP2918-0032 and EP2918-22328 Version: 1.2.0
1.3 Documentation issue status
Version Comment
1.2.0 • In chapter Technical data [}11]Technical data link to download page of certificates added
• Chapter "Firmware update of TwinSAFE products" removed
• I/O component EP2918-2232 added as variant of EP2918-0032
• Chapter Temperature measurement [}21] renamed
• Chapter Project design limits of the EP2918 [}25] moved
• Some figures renamed
1.1.0 • Chapter Decommissioning [}45] updated
1.0.0 • First release
0.6 • Safety-related data updated
• EN81 notes removed
• Maximum temperature entered
0.5 • Data for the functional overcurrent cut-off added
0.4 • Technical data updated
0.3 • Note on commissioning test added
• Note on safe output added
0.2 • Revision following review
• EN81 notes on TwinSAFE EtherCAT Boxes adapted
• Derating information added
0.1 • First draft
1.4 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
version
Modifications
First release of the EP2918-2232
14/11/2019 01 00 First release of the EP2918-0032

System description
EP2918-0032 and EP2918-2232 9Version: 1.2.0
2 System description
2.1 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
EP2918-0032 and EP2918-223210 Version: 1.2.0
3 Product description
3.1 EP2918-0032 and EP2918-2232
The EP2918 is an EtherCAT Box with digital outputs for 24VDC actuators. The EtherCAT Box has 8 fail-safe
outputs, each with a maximum output current of 2A (at 24VDC).
The EL2918 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: EP2918 – TwinSAFE EtherCAT Box with 8 fail-safe outputs
The TwinSAFE EtherCAT Box has the usual design of an EtherCAT Box with a width of 60mm and a height
of 150mm.
EP2918 variants
The EP2918 has an integrated safety control that can be used for user-specific applications directly
on the component. The variant EP2918-2232 does not have this functionality and represents a pure
I/O component.

Product description
EP2918-0032 and EP2918-2232 11Version: 1.2.0
3.2 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 actuators such as
• contactors, protective door switches with tumblers, valves etc.
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 wat-
tless 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 out-
put 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 docu-
mentation 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 Twin-
SAFE import or externally generated automatic project creation procedures, are not covered by the certifi-
cate.
WARNING
Commissioning test
Before the EP2918-0032 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.
3.3 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 description
EP2918-0032 and EP2918-223212 Version: 1.2.0
Product designation EP2918-0032 and EP2918-2232
Fieldbus EtherCAT
Number of outputs 8
Connection of the outputs M12
Status display 8 (one green LED per output), 5 diagnostic LEDs, 2 LEDs for Us/Up, 2 LEDs
for EtherCAT Link/Act
Response time
(read input/write to E-bus)
typical: 4ms (in default setting without local TwinSAFE logic),
maximum: see fault reaction time
Watchdog time adjustable from 2ms to 60s
Fault reaction time ≤ watchdog time
Cable length between actuator and EtherCAT Box Unshielded: max. 100m (0.75 or 1mm²)
Shielded: max. 100m (0.75 or 1mm²)
Safe outputs max. 2.0A (at 24VDC) per channel
Diagnostic thresholds:
>4.7V -> high signal is detected
<1.0V -> low signal is detected
Outputs (functional) Functional overcurrent switch-off of the output driver:
typically between 2.9A and 6.3A
(This overcurrent switch-off is implemented purely functionally and cannot be
loaded from a safety aspect.)
Input process image 6 bytes (via FSoE if using the default project)
Output process image 7 bytes (via FSoE if using the default project)
EP2918 supply voltage 24VDC (–15%/+20%)
Current consumption US
(8 output channels switched)
8 channels occupied: typically 120mA
0 channels occupied: typically 80mA
(provide a 4A fuse)
Current consumption UP
(8 output channels switched, plus load current)
8 channels occupied: approx. 70mA
0 channels occupied: approx. 20mA
(provide a 16A fuse)
Power loss of the EtherCAT Box typically 4.9watts
Electrical isolation (between the channels) no
Electrical isolation (between the channels and Ether-
CAT)
yes
Insulation voltage (between the channels and Ether-
CAT, under common operating conditions)
Insulation tested with 500VDC
Dimensions (WxHxD) 60(+0.5)mmx150(+0.5)mmx26.5mm
Housing material PBT+PET (Valox 855)
Flame Class: V-0
Sealing compound Polyurethane PU552L
Flame Class: V-0
Weight approx.470g
Permissible ambient temperature
(operation)
-25°C ... + +60°C
Permissible ambient temperature
(transport/storage)
-40°C ... + +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 tests according to EN61326-3-1:2017(SIL3)
IEC61131-2:2017 Chapter 6.2 and 7 (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
EP2918-0032 and EP2918-2232 13Version: 1.2.0
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.
3.4 Safety parameters
Key data EP2918-0032 and EP2918-2232
Lifetime [a] 20
Proof test interval [a] not required1
PFHD4.16E-09
PFD 2.00E-05
MTTFDhigh
DC high
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 EtherCAT Box can be used for safety-related applications according to IEC61508:2010 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.

Product description
EP2918-0032 and EP2918-223214 Version: 1.2.0
3.5 Safe output
The safe outputs are implemented as a single channel per module. It is essential to pay attention to the
following note if two or more outputs run in a common sheathed cable.
DANGER
Clocked signals inside a sheathed cable
If clocked signals from different modules are used inside a single sheathed cable, then a module error such
as a cross-circuit or external power supply 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.
3.6 Dimensions
Fig.3: Dimensions
The EtherCAT Box has the following dimensions:
Width 60.0 (+0.5) mm
Height 150.0 (+0.5) mm
Depth 26.5mm
When fully wired, the connected cables increase the total depth of the module.

Operation
EP2918-0032 and EP2918-2232 15Version: 1.2.0
4 Operation
4.1 Environmental conditions
Please ensure that the TwinSAFE Boxes are only transported, stored and operated under the specified
conditions (see technical data)!
WARNING
Risk of injury!
The TwinSAFE EtherCAT boxes must not be used under the following conditions.
• under the influence of ionizing radiation (that exceeds the level of the natural environmental radiation)
• in corrosive environments
NOTE
Electromagnetic compatibility
The TwinSAFE components comply with the current standards on electromagnetic compatibility with regard
to spurious radiation and immunity to interference in particular.
However, in cases where devices such as mobile phones, radio equipment, transmitters or high-frequency
systems that exceed the interference emissions limits specified in the standards are operated near Twin-
SAFE components, the function of the TwinSAFE components may be impaired.
4.2 Installation
4.2.1 Fixing
NOTE
Protect connectors against soiling!
Protect all connections from contamination during installation and operation of the modules! Protection
class IP67 is only guaranteed if all cables and plug connectors are connected, and unused connections are
protected with the appropriate cover plugs!
Connector sets see catalog.
• Modules with narrow housing are installed with two M3 screws.
• Modules with wide housing are installed with two M3 screws in the mounting holes in the corners or
two M4 screws in the central fastening holes (see also chapter Power connection and grounding).
• The bolts must be longer than 15mm. The fastening holes in the modules have no thread.
• Note when mounting that the overall height is increased further by the fieldbus connections.
4.2.2 Connection
4.2.2.1 Nut torque for connectors
M8 connector
We recommend fastening the M8 connector with a torque of 0.4Nm. A max. torque of 0.5Nm is also
permissible if using a torque screwdriver (Beckhoff article ZB8800).

Operation
EP2918-0032 and EP2918-223216 Version: 1.2.0
Fig.4: EtherCAT Box with M8 plug connectors
M12 connector
We recommend fastening the M12 connector with a torque of 0.6Nm.
Fig.5: EtherCAT Box with M8 and M12 connectors
7/8" plug connectors
We recommend fastening the 7/8" plug connectors with a torque of 1.5Nm.
Fig.6: 7/8" plug connectors
Torque wrench
Fig.7: Torque wrench ZB8801
NOTE
Ensure the proper torque is used
Use torque wrenches available from Beckhoff to tighten the connectors (see accessories)!

Operation
EP2918-0032 and EP2918-2232 17Version: 1.2.0
4.2.2.2 EtherCAT connection
The EtherCAT Box (EPxxxx) has two M8 connectors marked green for the incoming and outgoing EtherCAT
connection.
Fig.8: EtherCAT connection 30 mm housing M8
Connection
There are various different standards for the assignment and colors of connectors and cables for EtherCAT.
EtherCAT Connector Cable Standard
Signal Description M8 ZB9010, ZB9020,
ZK1090-6292
ZB903x,
ZK1090-31xx
TIA-568B
Tx + Transmit Data+ Pin 1 yellow1orange/white2white/orange
Tx - Transmit Data- Pin 4 orange1orange2orange
Rx + Receive Data+ Pin 2 white1blue/white2white/green
Rx - Receive Data- Pin 3 blue1blue2green
Shield Shield Housing Shield Shield Shield
1) Core colors according to EN61918
2) Core colors
4.2.2.3 EtherCAT cables
For connecting EtherCAT devices only Ethernet cables that meet the requirements of at least category 5
(CAT5) according to EN 50173 or ISO/IEC 11801 should be used.
Wiring recommendations
Detailed recommendations for EtherCAT wiring can be found in the documentation "Design recom-
mendations for EtherCAT/Ethernet infrastructure", which is available for download from www.Beck-
hoff.de.
EtherCAT uses four cable wires for signal transmission. Due to automatic cable detection (auto-crossing)
symmetric (1:1) or cross-over cables can be used between EtherCAT devices from BECKHOFF.
4.2.2.4 Power connection and grounding
This chapter provides basic information about the power supply and grounding of the TwinSAFE EtherCAT
Box. In particular, please note that the General information on connecting the functional earth only serves as
an example.
Supply voltages (power connection)
The supply and distribution of the supply voltages takes place via the connections:
•Us/Up IN for feeding in the supply voltages
•Us/Up OUT for forwarding the supply voltages.

Operation
EP2918-0032 and EP2918-223218 Version: 1.2.0
Both connections have a 7/8" thread and are located to the left (Us/Up IN) and right (Us/Up OUT) of the
TwinSAFE EtherCAT Box (see figure: EP2918 - power connection).
Information: An overview of pin assignment for the two connections can be found later in this chapter.
General information for connecting the functional earth
The grounding lugs of the EP2918 are internally connected to the safe outputs (pin 5 of the M12
connections).
To provide functional earthing , if possible the connection should:
• have a large surface
• have low resistance and
• be permanent.
In order to establish a permanent connection, all operating states of the machine, such as vibrations, must
be taken into account.
The connection can be established using the following two methods:
1. via a bolted connection from the TwinSAFE EtherCAT Box to the machine bed
2. through a ring terminal (hole dia. 4.3 mm) with cable connection to the functional earth
A grounding lug is available at the upper and lower mounting points (hole dia. 5mm for M4 thread) on the
housing.
NOTE
Connecting the functional earth
The functional earth connection should have low resistance and a large surface.
Power connection 7/8-inch connector pin assignment
Contact Voltage
1 GND Up
2 GND Us
3
Connecting the functional earth
4 Control voltage Us, +24VDC (provide a 4A fuse)
5 Peripheral voltage Up, +24VDC (provide a 16A fuse)
The contacts of the 7/8" plug connectors can conduct a maximum current of 16A.
Two LEDs indicate the status of the supply voltages.

Operation
EP2918-0032 and EP2918-2232 19Version: 1.2.0
NOTE
Do not confuse the power port with EtherCAT port!
Never connect the power cables (M8, 24VDC) to the green-marked EtherCAT sockets of the EtherCAT Box
modules. This can cause the destruction of the modules!
Control voltage Us
The fieldbus and the processor logic are supplied from the 24VDC control voltage Us. The control voltage is
electrically isolated from the fieldbus circuitry.
Peripheral voltage Up
The peripheral voltage Up supplies the digital safe outputs.
Redirection of the supply voltages
The power IN and OUT connections are bridged in the module. Hence, the supply voltages Us and Up can
be passed from EtherCATBox to EtherCATBox in a simple manner.
CAUTION
Note the maximum current!
Also ensure when forwarding the supply voltages Us and Up that the maximum permissible current of 16A
for each contact of the 7/8" plug connector is not exceeded!

Operation
EP2918-0032 and EP2918-223220 Version: 1.2.0
4.2.2.5 Signal connection for outputs
The EtherCAT Box has 8 fail-safe outputs with a maximum output current of 2.0A each (at 24VDC).
Fig.9: Safe outputs 1 to 8
Fig.10: PinOut safe output