Beckhoff EJ2008 User manual

Documentation | EN

EJ2008

8-Channel digital output module 24 V DC, 0.5 A

2020-12-11 | Version: 1.5

Table of contents

Table of contents

1 Foreword ....................................................................................................................................................5

1.1 Notes on the documentation..............................................................................................................5

1.2 Safety instructions .............................................................................................................................6

1.3 Intended use......................................................................................................................................7

1.4 Signal distribution board ....................................................................................................................7

1.5 Documentation issue status ..............................................................................................................7

1.6 Guide through documentation ...........................................................................................................7

1.7 Marking of EtherCAT plug-in modules...............................................................................................8

1.7.1 Beckhoff Identification Code (BIC)................................................................................... 11

1.7.2 Certificates....................................................................................................................... 13

2 System overview .....................................................................................................................................14

3 Product overview.....................................................................................................................................15

3.1 EJ2008 - Introduction ......................................................................................................................15

3.2 EJ2008 - Technical data..................................................................................................................16

3.3 EJ2008 - Pinout ...............................................................................................................................17

3.4 EJ2008 - LEDs ................................................................................................................................18

4 Installation of EJ modules ......................................................................................................................19

4.1 Power supply for the EtherCAT plug-in modules.............................................................................19

4.2 EJxxxx - dimensions........................................................................................................................21

4.3 Installation positions and minimum distances .................................................................................22

4.3.1 Minimum distances for ensuring installability................................................................... 22

4.3.2 Installation positions ........................................................................................................ 23

4.4 Codings ...........................................................................................................................................25

4.4.1 Color coding..................................................................................................................... 25

4.4.2 Mechanical position coding.............................................................................................. 26

4.5 Installation on the signal distribution board .....................................................................................27

4.6 Extension options ............................................................................................................................29

4.6.1 Using placeholder modules for unused slots ................................................................... 29

4.6.2 Linking with EtherCAT Terminals and EtherCAT Box modules via an Ethernet/EtherCAT

connection ....................................................................................................................... 30

4.7 IPC integration.................................................................................................................................31

4.8 Disassembly of the signal distribution board ...................................................................................33

5 EtherCAT basics......................................................................................................................................34

6 Commissioning........................................................................................................................................35

6.1 General notes for setting the watchdog...........................................................................................35

7 Appendix ..................................................................................................................................................38

7.1 EtherCAT AL Status Codes.............................................................................................................38

7.2 EJ2008 - Firmware compatibility .....................................................................................................38

7.3 Support and Service ........................................................................................................................39

EJ2008 3Version: 1.5

Table of contents

EJ20084 Version: 1.5

Foreword

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 documentation and the following notes and explanations are followed when installing
and commissioning these components.
It is the duty of the technical personnel to use the documentation published at the respective time of each
installation and commissioning.

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.

Disclaimer

The documentation has been prepared with care. The products described are, however, constantly under
development.

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®, 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® is registered trademark and patented technology, licensed by Beckhoff Automation GmbH,
Germany.

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.

EJ2008 5Version: 1.5

Foreword

1.2 Safety instructions

Safety regulations

Please note the following safety instructions and explanations!
Product-specific safety instructions can be found on following pages or in the areas mounting, wiring,
commissioning etc.

Exclusion of liability

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.

Personnel qualification

This description is only intended for trained specialists in control, automation and drive engineering who are
familiar with the applicable national standards.

Description of instructions

In this documentation 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 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.

EJ20086 Version: 1.5

Foreword

1.3 Intended use

WARNING

Caution - Risk of injury!

EJ components may only be used for the purposes described below!

1.4 Signal distribution board

NOTE

Signal distribution board

Make sure that the EtherCAT plug-in modules are used only on a signal distribution board that has been
developed and manufactured in accordance with the Design Guide.

1.5 Documentation issue status

Version Comment

1.5 • New Title page

• Update chapter Pinout

• Chapters Basics communication, TwinCAT Quick Start , TwinCAT

development environment and General Notes - EtherCAT Slave
Application replaced by references in the chapter Guide through
documentation

• Update structure

1.4 • Note Signal distribution board added

• Chapter Version identification of EtherCAT devices replaced by chapter

Marking of EtherCAT plug-in modules

• Update chapter Technical data

• Update chapter Pinout

1.3 • Chapter Intended use added

• Update Technical data

• Update chapter Pinout

• Update chapter Installation of EJ modules

• Update structure

1.2 • Update Technical data

• Update chapter Power supply for the EtherCAT plug-in modules

• Update structure

1.1 • Update Technical data

• Pinout added

1.0 • First publication EJ2008

1.6 Guide through documentation

NOTE

Further components of documentation

The documentations named in the following table are further components of the complete
documentation. These documentations are required for the use of EtherCAT plug-in mod­ules.

EJ2008 7Version: 1.5

Foreword

No. Title Description

[1]

[2]

[3]

EtherCAT System Documentation

Infrastructure for EtherCAT/Ethernet

Design GuideSignal-Distribution-Board for
standard EtherCAT plug-in modules

• System overview

• EtherCAT basics

• Cable redundancy

• Hot Connect

• Distributed Clocks

• Configuration of EtherCAT-Components

• Technical recommendations and notes for
design, implementation an testing

Requirements for the design of a Signal­Distribution-Board for standard EtherCAT plug-in
modules

• Backplane mounting guidelines

• Module placement

• Routing guidelines

1.7 Marking of EtherCAT plug-in modules

Designation

A Beckhoff EtherCAT device has a 14-digit technical designation, made up as follows (e.g.
EJ1008-0000-0017)

• Order identifier

◦ family key: EJ

◦ product designation: The first digit of product designation is used for assignment to a product

group (e.g. EJ2xxx = digital output module).

◦ Version number: The four digit version number identifies different product variants.

• Revision number:
It is incremented when changes are made to the product.

The Order identifier and the revision number are printed on the side of EtherCAT plug-in modules (s.
following illustration (A and B).

EJ20088 Version: 1.5

Foreword

Fig.1: Order identifier (A), Revision number (B) and serial number (C) using the example of EJ1008

Product group Example

Product designation Version Revision

EtherCAT Coupler
EJ11xx

Digital input modules
EJ1xxx

Digital output modules
EJ2xxx

Analog input modules
EJ3xxx

Analog output modules
EJ4xxx

Special function modules
EJ5xxx, EJ6xxx

Motion modules
EJ7xxx

EJ1101 -0022

EJ1008
8-channel

EJ2521
1-channel

EJ3318
8-channel thermocouple

EJ4134
4-channel

EJ6224
IO-Link master

EJ7211
servomotor

(Coupler with external connectors, power supply module and
optional ID switches

-0000
(basic type)

-0224
(2 x 24V outputs)

-0000
(basic type)

-0000
(basic type)

-0090
(with TwinSAFE SC)

-9414
(with ECT, STO and TwinSAFE SC)

Notes

• The elements mentioned above result in the technical designation. EJ1008-0000-0017 is used in the
example below.

• EJ1008-0000 is the order identifier, in the case of “-0000” usually abbreviated to EJ1008.

• The revision -0017 shows the technical progress, such as the extension of features with regard to the
EtherCAT communication, and is managed by Beckhoff.
In principle, a device with a higher revision can replace a device with a lower revision, unless specified
otherwise, e.g. in the documentation.
Associated and synonymous with each revision there is usually a description (ESI, EtherCAT Slave

Information) in the form of an XML file, which is available for download from the Beckhoff web site.

• The product designation, version and revision are read as decimal numbers, even if they are
technically saved in hexadecimal.

-0016

-0017

-0016

-0017

-0019

-0016

-0029

Serial number

The serial number for EtherCAT plug-in modules is usually the 8-digit number printed on the side of the
module (see following illustration C). The serial number indicates the configuration in delivery state and
therefore refers to a whole production batch, without distinguishing the individual modules of a batch.

EJ2008 9Version: 1.5

Foreword

Fig.2: Order identifier (A), revision number (B) and serial number (C) using the example of EJ1008

Serial number Example serial number: 08 15 08 16

KK - week of production (CW, calendar week) 08 - week of production: 08

YY - year of production 15 - year of production: 2015

FF - firmware version 08 -f irmware version: 08

HH - hardware version 16 - hardware version: 16

EJ200810 Version: 1.5

Foreword

1.7.1 Beckhoff Identification Code (BIC)

The Beckhoff Identification Code (BIC) is increasingly being applied to Beckhoff products to uniquely identify
the product. The BIC is represented as a Data Matrix Code (DMC, code scheme ECC200), the content is
based on the ANSI standard MH10.8.2-2016.

Fig.3: BIC as data matrix code (DMC, code scheme ECC200)

The BIC will be introduced step by step across all product groups.

Depending on the product, it can be found in the following places:

• on the packaging unit

• directly on the product (if space suffices)

• on the packaging unit and the product

The BIC is machine-readable and contains information that can also be used by the customer for handling
and product management.

Each piece of information can be uniquely identified using the so-called data identifier (ANSI
MH10.8.2-2016). The data identifier is followed by a character string. Both together have a maximum length
according to the table below. If the information is shorter, it shall be replaced by spaces. The data under
positions 1-4 are always available.

The following information is contained:

EJ2008 11Version: 1.5

Foreword

Item
no.

1 Beckhoff order

2 Beckhoff Traceability

3 Article description Beckhoff article

4 Quantity Quantity in packaging

5 Batch number Optional: Year and week

6 ID/serial number Optional: Present-day

7 Variant number Optional: Product variant

...

Further types of information and data identifiers are used by Beckhoff and serve internal processes.

Structure of the BIC

Type of informa­tion

number

Number (BTN)

Explanation Data iden-

tifier

Beckhoff order number 1P 8 1P072222

Unique serial number,
see note below

description, e.g. EL1008

unit, e.g. 1, 10, etc.

of production

serial number system,
e.g. with safety products

number on the basis of
standard products

S 12 SBTNk4p562d7

1K 32 1KEL1809

Q 6 Q1

2P 14 2P4015031800

51S 12 51S678294104

30P 32 30PF971 ,

Number of digits
incl. data identifier

Example

16

2*K183

Example of composite information from items 1 - 4 and 6. The data identifiers are marked in red for better
display:

BTN

An important component of the BIC is the Beckhoff Traceability Number (BTN, item no. 2). The BTN is a
unique serial number consisting of eight characters that will replace all other serial number systems at
Beckhoff in the long term (e.g. batch designations on IO components, previous serial number range for
safety products, etc.). The BTN will also be introduced step by step, so it may happen that the BTN is not yet
coded in the BIC

Notice

This information has been carefully prepared. However, the procedure described is constantly being further
developed. We reserve the right to revise and change procedures and documentation at any time and
without prior notice. No claims for changes can be made from the information, illustrations and descriptions
in this information.

EJ200812 Version: 1.5

1.7.2 Certificates

• The EhterCAT plug-in modules meet the requirements of the EMC and Low Voltage Directive. The CE
mark is printed on the side of the modules.

• The cRUus imprint identifies devices that meet product safety requirements according to U.S. and
Canadian regulations.

• The warning symbol is a request to read the corresponding documentation. The documentations for
EtherCAT plug-in modules can be downloaded from the Beckhoff homepage.

Foreword

Fig.4: Marking for CE and UL using EJ1008 as an example

EJ2008 13Version: 1.5

System overview

2 System overview

Electronically, the EJxxxx EtherCAT plug-in modules are based on the EtherCAT I/O system. The EJ system
consists of the signal distribution board and EtherCAT plug-in modules. It is also possible to connect an IPC
to the EJ system.
The EJ system is suitable for mass production applications, applications with small footprint and applications
requiring a low total weight.
The machine complexity can be extended by means of the following:

• reserve slots,

• the use of placeholder modules,

• linking of EtherCAT Terminals and EtherCAT Boxes via an EtherCAT connection.

The following diagram illustrates an EJ system. The components shown are schematic, to illustrate the
functionality.

Fig.5: EJ system sample

Signal distribution board

The signal distribution board distributes the signals and the power supply to individual application-specific
plug connectors, in order to connect the controller to further machine modules. Using pre-assembled cable
harnesses avoids the need for time-consuming connection of individual wires. Coded components reduce
the unit costs and the risk of miswiring.
Beckhoff offers development of signal distribution boards as an engineering service. Customers have the
option to develop their own signal distribution board, based on the design guide.

EtherCAT plug-in modules

Similar to the EtherCAT terminal system, a module strand consists of a Bus Coupler and I/O modules.
Almost all of the EtherCAT Terminals can also be manufactured in the EJ design as EtherCAT plug-in
modules. The EJ modules are directly attached to the signal distribution board. The communication, signal
distribution and supply take place via the contact pins at the rear of the modules and the PCB tracks of the
signal distribution board. The coding pins at the rear serve as mechanical protection against incorrect
connection. Color coding on the housing facilitates distinguishing of the modules.

EJ200814 Version: 1.5

3 Product overview

3.1 EJ2008 - Introduction

Product overview

Fig.6: EJ2008

8-channel digital output 24VDC, 0.5A

The EJ2008 digital output module connects binary control signals of the automation device in an electrically
isolated manner to the actuators of the process level. The EtherCAT plug-in module is protected against
reverse polarity at the Up contacts. The EJ2008 contains 8 channels, whose signal states are displayed by
LEDs.

CAUTION

Watchdog settings

Please refer to section "Notes for setting the watchdog [}35]".

EJ2008 15Version: 1.5

Product overview

3.2 EJ2008 - Technical data

Technical data EJ2008

Number of outputs 8

Rated load voltage 24VDC (-15%/ +20%)

Load type ohmic, inductive, lamp load

Distributed clocks -

Output current per channel maximum 0.5A (short-circuit proof)

Reverse voltage protection yes

Switch-off energy (inductive) max. <. 150mJ/channel

Switching times TON: 60µs typ.; T

Current consumption via E-bus typ. 90mA

Electrical isolation 500V (E-bus/field voltage)

Current consumption load voltage (Up contacts) typ. 15mA + load

Permissible ambient temperature range during opera­tion

Permissible ambient temperature range during storage -40°C .. +85°C

Permissible relative humidity 95%, no condensation

Operating altitude max. 2,000m

Dimensions (W x H x D) approx. 12mm x 66mm x 55mm

Weight approx. 30g

Mounting On signal distribution board

Pollution degree 2

Installation positon

Position of the coding pins [}26]

Color coding red

Vibration/shock resistance conforms to EN 60068-2-6 / EN 60068-2-27 (with corresponding signal distri-

EMC resistance burst/ESD conforms to EN 61000-6-2/EN 61000-6-4 (with corresponding signal distribu-

Protection class EJ module: IP20,

Approval CE, UL

-25°C .. +60°C (extended temperature range)

Standard [}23]

1 and 4

bution board)

tion board)

EJ system: dependent on signal distribution board and housing

: 300µs typ.

OFF

CE approval

The CE Marking refers to the EtherCAT plug-in module mentioned above.
If the EtherCAT plug-in module is used in the production of a ready-to-use end product (PCB in con­junction with a housing), the manufacturer of the end product must check compliance of the overall
system with relevant directives and CE certification.
To operate the EtherCAT plug-in modules, they must be installed in a housing.

EJ200816 Version: 1.5

3.3 EJ2008 - Pinout

Product overview

Fig.7: EJ2008 - Pinout

The PCB footprint can be downloaded from the Beckhoff homepage.

NOTE

Damage to devices possible!

• The pins named with “NC” must not be connected.

• Before installation and commissioning read the chapters Installation of EJ modules
[}19] and Commissioning [}35]!

EJ2008 17Version: 1.5

Product overview

3.4 EJ2008 - LEDs

Fig.8: EJ2008 - LEDs

EJ2008 - LEDs

LED Color Display State Description

RUN green off Init State of the EtherCAT State Machine: INIT = initialization of the plug-in

flashing Pre-Operational State of the EtherCAT State Machine: PREOP = function for mailbox

Single flash Safe-Operational State of the EtherCAT State Machine: SAFEOP = verification of the

on Operational State of the EtherCAT State Machine: OP = normal operating state;

flickering Bootstrap State of the EtherCAT State Machine: BOOTSTRAP = function for

Up green off - No 24V

on - 24V

O1 .. O8 green off - No output signal

on - 24VDC output signal at the respective output

module

communication and different standard-settings set

Sync Manager channels and the distributed clocks.
Outputs remain in safe state

mailbox and process data communication is possible

firmware updates of the plug-in module

power supply connected

DC

power supply connected

DC

EJ200818 Version: 1.5

Installation of EJ modules

4 Installation of EJ modules

4.1 Power supply for the EtherCAT plug-in modules

WARNING

Power supply

A SELV/PELV power supply must be used to supply power for the EJ coupler and modules. Couplers and
modules have to be connected to SELV/PELV circuits exclusively.

The signal distribution board should have a power supply designed for the maximum possible current load of
the module string. Information on the current required from the E-bus supply can be found for each module
in the respective documentation in section “Technical data”, online and in the catalog. The power
requirement of the module string is displayed in the TwinCAT System Manager.

E-bus power supply with EJ1100 or EJ1101-0022 and EJ940x

The EJ1100 Bus Coupler supplies the connected EJ modules with the E-bus system voltage of 3.3V. The
Coupler can accommodate a load up to 2.2A. If a higher current is required, a combination of the coupler
EJ1101-0022 and the power supply units EJ9400 (2.5A) or EJ9404 (12A) should be used. The EJ940x
power supply units can be used as additional supply modules in the module string.

Depending on the application, the following combinations for the E-bus supply are available:

Fig.9: E-bus power supply with EJ1100 or EJ1101-0022 + EJ940x

In the EJ1101-0022 coupler, the RJ45 connectors and optional ID switches are external and can be
positioned anywhere on the signal distribution board, as required. This facilitates feeding through a housing.

The EJ940x power supply plug-in modules provide an optional reset function (see chapter Connection of the
documentation for EJ9400 and EJ9404)

EJ2008 19Version: 1.5

Installation of EJ modules

E-bus power supply with CXxxxx and EK1110-004x

The Embedded PC supplies the attached EtherCAT terminals and the EtherCAT EJ coupler

• with a supply voltage of 24VDC (-15 %/+20%). This voltage supplies the E-bus and the bus terminal
electronics.
The CXxxxx units supply the E-bus with up to 2,000mA E-bus current. If a higher current is required
due to the attached terminals, power feed terminals or power supply plug-in modules must be used for
the E-bus supply.

• with a peripheral voltage Up of 24VDC to supply the field electronics.

The EK1110-004x EtherCAT EJ couplers relay the following parameters to the signal distribution board via
the rear connector:

• the E-bus signals,

• the E-bus voltage U

(3.3V) and

EBUS

• the peripheral voltage UP (24VDC).

Fig.10: PCB with Embedded PC, EK1110-0043 and EJxxxx, rear view EK1110-0043

EJ200820 Version: 1.5

Installation of EJ modules

4.2 EJxxxx - dimensions

The EJ modules are compact and lightweight thanks to their design. Their volume is approx. 50% smaller
than the volume of the EL terminals. A distinction is made between four different module types, depending
on the width and the height:

Module type Dimensions (W x H x D) Sample in figure below

Coupler 44mm x 66mm x 55mm EJ1100 (ej_44_2xrj45_coupler)

Single module 12mm x 66mm x 55mm EJ1809 (ej_12_16pin_code13)

Double module 24mm x 66mm x 55mm EJ7342 (ej_24_2x16pin_code18)

Single module (long) 12mm x 152mm x 55mm EJ1957 (ej_12_2x16pin_extended_code4747)

Fig.11: EJxxxx - Dimensions

The technical drawings can be downloaded from the Beckhoff homepage. The drawings are named as
described in the drawing below.

Fig.12: Naming of the technical drawings

EJ2008 21Version: 1.5

Installation of EJ modules

4.3 Installation positions and minimum distances

4.3.1 Minimum distances for ensuring installability

Note the dimensions shown in the following diagram for the design of the signal distribution board to ensure
safe latching and simple assembly / disassembly of the modules.

Fig.13: Mounting distances EJ module - PCB

Observing the reaching area

A minimum reaching area of 92mm is required for assembly / disassembly, in order to be able to
reach the mounting tabs with the fingers.

Adherence to the recommended minimum distances for ventilation (see section Installation position
[}23]) ensures an adequate reaching area.

The signal distribution board must have a thickness of 1.6mm and a minimum distance of 4mm from the
mounting surface, in order to ensure latching of the modules on the board.

EJ200822 Version: 1.5

Installation of EJ modules

4.3.2 Installation positions

NOTE

Constraints regarding installation position and operating temperature range

Please refer to the technical data [}16] for the installed components to ascertain whether any restrictions
regarding the mounting position and/or the operating temperature range have been specified. During instal­lation of modules with increased thermal dissipation, ensure adequate distance above and below the mod­ules to other components in order to ensure adequate ventilation of the modules during operation!

The standard installation position is recommended. If a different installation position is used, check whether
additional ventilation measures are required.

Ensure that the specified conditions (see Technical data) are adhered to!

Optimum installation position (standard)

For the optimum installation position the signal distribution board is installed horizontally, and the fronts of
the EJ modules face forward (see Fig. Recommended distances for standard installation position). The
modules are ventilated from below, which enables optimum cooling of the electronics through convection.
“From below” is relative to the acceleration of gravity.

Fig.14: Recommended distances for standard installation position

Compliance with the distances shown in Fig. Recommended distances for standard installation position is
recommend. The recommended minimum distances should not be regarded as restricted areas for other
components. The customer is responsible for verifying compliance with the environmental conditions
described in the technical data. Additional cooling measures must be provided, if required.

EJ2008 23Version: 1.5

Installation of EJ modules

Other installation positions

All other installation positions are characterized by a different spatial position of the signal distribution board,
see Fig. Other installation positions.

The minimum distances to ambient specified above also apply to these installation positions.

Fig.15: Other installation positions

EJ200824 Version: 1.5

4.4 Codings

4.4.1 Color coding

Installation of EJ modules

Fig.16: EJ modules color code; sample: EJ1809

The EJ modules are color-coded for a better overview in the control cabinet (see diagram above). The color
code indicates the signal type. The following table provides an overview of the signal types with
corresponding color coding.

Signal type Modules Color

Coupler EJ11xx No color coding

Digital input EJ1xxx Yellow

Digital output EJ2xxx Red

Analog input EJ3xxx Green

Analog output EJ4xxx Blue

Motion EJ7xxx orange

System EJ9xxx grey

EJ2008 25Version: 1.5

Installation of EJ modules

4.4.2 Mechanical position coding

The modules have two signal-specific coding pins on the underside (see Figs. B1 and B2 below). In
conjunction with the coding holes in the signal distribution board (see Figs. A1 and A2 below), the coding
pins provide an option for mechanical protection against incorrect connection. This significantly reduces the
risk of error during installation and service.
Couplers and placeholder modules have no coding pins.

Fig.17: Mechanical position coding with coding pins (B1 and B2) and coding holes (A1 and A2)

The following diagram shows the position of the position coding with position numbers on the left-hand side.
Modules with the same signal type have the same coding. For sample, all digital input modules have the
coding pins at positions one and three. There is no plug protection between modules with the same signal
type. During installation the module type should therefore be verified based on the device name.

Fig.18: Pin coding; sample: digital input modules

EJ200826 Version: 1.5

Installation of EJ modules

4.5 Installation on the signal distribution board

EJ modules are installed on the signal distribution board. The electrical connections between coupler and EJ
modules are realized via the pin contacts and the signal distribution board.

The EJ components must be installed in a control cabinet or enclosure which must provide protection against
fire hazards, environmental conditions and mechanical impact.

WARNING

Risk of injury through electric shock and damage to the device!

Bring the module system into a safe, de-energized state before starting installation, disassembly or wiring
of the modules.

NOTE

Risk of damage to components through electrostatic discharge!

Observe the regulations for ESD protection.

Fig.19: Installation of EJ modules

A1 / A2 Latching lugs top / bottom C1 / C2 Mounting holes

B1 / B2 Coding pins D1 / D2 Coding holes

To install the modules on the signal distribution board proceed as follows:

1. Before the installation, ensure that the signal distribution board is securely connected to the mounting
surface. Installation on an unsecured signal distribution board may result in damage to the board.

2. If necessary, check whether the positions of the coding pins (B) match the corresponding holes in the
signal distribution board (D).

3. Compare the device name on the module with the information in the installation drawing.

4. Press the upper and the lower mounting tabs simultaneously and push the module onto the board
while gently moving it up and down, until the module is latched securely.
The required contact pressure can only be established and the maximum current carrying capacity en­sured if the module is latched securely.

5. Use placeholder modules (EJ9001) to fill gaps in the module strand.

EJ2008 27Version: 1.5

Installation of EJ modules

NOTE

• During installation ensure safe latching of the modules on the signal distribution board! The conse­quences of inadequate contact pressure include:

ð loss of quality of the transferred signals,

ð increased power dissipation of the contacts,

ð impairment of the service life.

EJ200828 Version: 1.5

Installation of EJ modules

4.6 Extension options

Three options are available for modifications and extensions of the EJ system.

• Replacing the placeholder modules with the function modules provided for the respective slot

• Assigning function modules specified for the respective slots for the reserve slots at the end of the

module string

• Linking with EtherCAT Terminals and EtherCAT Box modules via an Ethernet/EtherCAT connection

4.6.1 Using placeholder modules for unused slots

The EJ9001 placeholder modules are used to close temporary gaps in the module strands (see Fig. A1
below). Gaps in the module strand cause interruption in EtherCAT communication and must be equipped
with placeholder modules.
In contrast to the passive terminals of the EL series, the placeholder modules actively participate in the data
exchange. Several placeholder modules can therefore be connected in series, without impairing the data
exchange.
Unused slots at the end of the module strand can be left as reserve slots (see Fig. B1 below).

The machine complexity is extended (extended version) by allocating unused slots (see Figs. A2 below ­Exchanging placeholder modules and B2 - Assigning reserve slots) according to the specifications for the
signal distribution board.

Fig.20: Sample: Exchanging placeholder modules and assigning reserve slots

E-bus supply

Exchange the placeholder modules with other modules changes the current input from the E-Bus.
Ensure that adequate power supply is provided.

EJ2008 29Version: 1.5

Installation of EJ modules

4.6.2 Linking with EtherCAT Terminals and EtherCAT Box modules via an Ethernet/EtherCAT connection

Fig.21: Example of extension via an Ethernet/EtherCAT connection

EJ200830 Version: 1.5

Installation of EJ modules

4.7 IPC integration

Connection of CX and EL terminals via the EK1110-004x EtherCAT EJ Coupler

The EK1110-0043 and EK1110-0044 EtherCAT EJ couplers connect the compact DIN-rail PCs of the CX
series and attached EtherCAT terminals (ELxxxx) with the EJ modules on the signal distribution board.

The EK1110-004x are supplied from the power supply unit of the Embedded PC.
The E-bus signals and the supply voltage of the field side UP are routed directly to the PCB via a plug
connector at the rear of the EtherCAT EJ couplers.

Due to the direct coupling of the Embedded PC and the EL terminals with the EJ modules on the PCB, no
EtherCAT extension (EK1110) or EtherCAT coupler (EJ1100) is required.

The Embedded PC can be expanded with EtherCAT terminals that are not yet available in the EJ system,
forexample.

Fig.22: Example PCB with Embedded PC, EK1110-0043 and EJxxxx, rear view EK1110-0043

EJ2008 31Version: 1.5

Installation of EJ modules

Connection of C6015 / C6017 via the EJ110x-00xx EtherCAT Coupler

Thanks to their ultra-compact design and versatile mounting options, the C6015 and C6017 IPCs are ideally
suited for connection to an EJ system.

In combination with the ZS5000-0003 mounting set, it is possible to place the C6015 and C6017 IPCs
compactly on the signal distribution board.
The EJ system is optimally connected to the IPC via the corresponding EtherCAT cable (see following Fig.
[A]).
The IPC can be supplied directly via the signal distribution board using the enclosed power plug (see Fig. [B]
below).

NOTE

Positioning on the signal distribution board

The dimensions and distances for placement and other details can be found in the Design
Guide and the documentation for the individual components.

The figure below shows the connection of a C6015 IPC to an EJ system as an example. The components
shown are schematic, to illustrate the functionality.

Fig.23: Example for the connection of a C6015 IPC to an EJ system

EJ200832 Version: 1.5

Installation of EJ modules

4.8 Disassembly of the signal distribution board

WARNING

Risk of injury through electric shock and damage to the device!

Bring the module system into a safe, de-energized state before starting installation, disassembly or wiring
of the modules.

NOTE

Risk of damage to components through electrostatic discharge!

Observe the regulations for ESD protection.

Each module is secured through latching on the distribution board, which has to be released for
disassembly.

Fig.24: Disassembly of EJ modules

To disassemble the module from the signal distribution board proceed as follows:

1. Before disassembly, ensure that the signal distribution board is securely connected to the mounting
surface. Disassembly of an unsecured signal distribution board may result in damage to the board.

2. Press the upper and lower mounting tabs simultaneously and pull the module from board while gently
moving it up and down.

EJ2008 33Version: 1.5

EtherCAT basics

5 EtherCAT basics

Please refer to the EtherCAT System Documentation for the EtherCAT fieldbus basics.

EJ200834 Version: 1.5

Commissioning

6 Commissioning

NOTE

Damage to devices or loss of data

Please refer to the EtherCAT System Documentation for commissioning basics of EtherCAT
devices.

6.1 General notes for setting the watchdog

ELxxxx terminals are equipped with a safety feature (watchdog) that switches off the outputs after a
specifiable time e.g. in the event of an interruption of the process data traffic, depending on the device and
settings, e.g. in OFF state.

The EtherCAT slave controller (ESC) in the EL2xxx terminals features two watchdogs:

• SM watchdog (default: 100 ms)

• PDI watchdog (default: 100 ms)

SM watchdog (SyncManager Watchdog)

The SyncManager watchdog is reset after each successful EtherCAT process data communication with the
terminal. If no EtherCAT process data communication takes place with the terminal for longer than the set
and activated SM watchdog time, e.g. in the event of a line interruption, the watchdog is triggered and the
outputs are set to FALSE. The OP state of the terminal is unaffected. The watchdog is only reset after a
successful EtherCAT process data access. Set the monitoring time as described below.

The SyncManager watchdog monitors correct and timely process data communication with the ESC from the
EtherCAT side.

PDI watchdog (Process Data Watchdog)

If no PDI communication with the EtherCAT slave controller (ESC) takes place for longer than the set and
activated PDI watchdog time, this watchdog is triggered.
PDI (Process Data Interface) is the internal interface between the ESC and local processors in the EtherCAT
slave, for example. The PDI watchdog can be used to monitor this communication for failure.

The PDI watchdog monitors correct and timely process data communication with the ESC from the
application side.

The settings of the SM- and PDI-watchdog must be done for each slave separately in the TwinCAT System
Manager.

EJ2008 35Version: 1.5

Commissioning

Fig.25: EtherCAT tab -> Advanced Settings -> Behavior -> Watchdog

Notes:

• the multiplier is valid for both watchdogs.

• each watchdog has its own timer setting, the outcome of this in summary with the multiplier is a
resulting time.

• Important: the multiplier/timer setting is only loaded into the slave at the start up, if the checkbox is
activated.
If the checkbox is not activated, nothing is downloaded and the ESC settings remain unchanged.

Multiplier

Multiplier

Both watchdogs receive their pulses from the local terminal cycle, divided by the watchdog multiplier:

1/25 MHz * (watchdog multiplier + 2) = 100µs (for default setting of 2498 for the multiplier)

The standard setting of 1000 for the SM watchdog corresponds to a release time of 100ms.

The value in multiplier + 2 corresponds to the number of basic 40 ns ticks representing a watchdog tick.
The multiplier can be modified in order to adjust the watchdog time over a larger range.

EJ200836 Version: 1.5

Commissioning

Example “Set SM watchdog”

This checkbox enables manual setting of the watchdog times. If the outputs are set and the EtherCAT
communication is interrupted, the SM watchdog is triggered after the set time and the outputs are erased.
This setting can be used for adapting a terminal to a slower EtherCAT master or long cycle times. The
default SM watchdog setting is 100ms. The setting range is 0...65535. Together with a multiplier with a
range of 1...65535 this covers a watchdog period between 0...~170 seconds.

Calculation

Multiplier = 2498 → watchdog base time = 1 / 25MHz * (2498 + 2) = 0.0001seconds = 100µs
SM watchdog = 10000 → 10000 * 100µs = 1second watchdog monitoring time

CAUTION

Undefined state possible!

The function for switching off of the SM watchdog via SM watchdog = 0 is only implemented in terminals
from version -0016. In previous versions this operating mode should not be used.

CAUTION

Damage of devices and undefined state possible!

If the SM watchdog is activated and a value of 0 is entered the watchdog switches off completely. This is
the deactivation of the watchdog! Set outputs are NOT set in a safe state, if the communication is inter­rupted.

EJ2008 37Version: 1.5

Appendix

7 Appendix

7.1 EtherCAT AL Status Codes

For detailed information please refer to the EtherCAT system description.

7.2 EJ2008 - Firmware compatibility

The EtherCAT plug-in module EJ2008 has no firmware.

EJ200838 Version: 1.5

Appendix

7.3 Support and Service

Beckhoff and their partners around the world offer comprehensive support and service, making available fast
and competent assistance with all questions related to Beckhoff products and system solutions.

Beckhoff's branch offices and representatives

Please contact your Beckhoff branch office or representative for local support and service on Beckhoff
products!

The addresses of Beckhoff's branch offices and representatives round the world can be found on her internet
pages: https://www.beckhoff.com/english/beckhoff/world.htm

You will also find further documentation for Beckhoff components there.

Beckhoff Support

Support offers you comprehensive technical assistance, helping you not only with the application of
individual Beckhoff products, but also with other, wide-ranging services:

• support

• design, programming and commissioning of complex automation systems

• and extensive training program for Beckhoff system components

Hotline: [phone]
Fax: [phone]
e-mail: [e-mail]

Beckhoff Service

The Beckhoff Service Center supports you in all matters of after-sales service:

• on-site service

• repair service

• spare parts service

• hotline service

Hotline: [phone]
Fax: [phone]
e-mail: [e-mail]

Beckhoff Headquarters

Beckhoff Automation GmbH & Co. KG

Huelshorstweg 20
33415 Verl
Germany

Phone: [phone]
Fax: [phone]
e-mail: [e-mail]
web:

EJ2008 39Version: 1.5

https://www.beckhoff.com

More Information:

www.beckhoff.com/EJ2008/

Beckhoff Automation GmbH & Co. KG
Hülshorstweg 20
33415 Verl
Germany
Phone: [phone]
[e-mail]
www.beckhoff.com