BECKHOFF EK1914 User Manual
Operating instructions for
EK1914
TwinSAFE Bus Coupler with
two fail-safe inputs and
two fail-safe outputs
Version: 1.1.1
Date: 2015-03-11
Table of contents
Table of contents
1 Foreword 3
1.1 Notes on the manual 3
1.1.1 Disclaimer 3
1.1.2 Brands 3
1.1.3 Patents 3
1.1.4 Copyright 3
1.1.5 Delivery conditions 3
1.2 Safety instructions 4
1.2.1 Delivery state 4
1.2.2 Operator's obligation to exercise diligence 4
1.2.3 Description of safety symbols 5
1.2.4 Origin of the document 5
1.2.5 Documentation issue status 6
2 System description 7
2.1 The Beckhoff Bus Terminal system 7
2.1.1 Bus Coupler 8
2.1.2 Bus Terminals 9
2.1.3 E-bus 9
2.1.4 Power contacts 9
2.2 TwinSAFE 10
2.2.1 The I/O construction kit is extended safely 10
2.2.2 Safety concept 10
2.2.3 EL1904, EL2904 - Bus Terminals with 4 fail-safe inputs or outputs 11
2.2.4 EL6900 - TwinSAFE logic terminal 11
2.2.5 The fail-safe principle (Fail Stop) 11
3 Product description 12
3.1 General description 12
3.2 Intended use 13
3.3 Technical data 14
3.4 Safety parameters 15
3.5 Dimensions 16
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Table of contents
4 Operation 17
4.1 Installation 17
4.1.1 Safety instructions 17
4.1.2 Transport / storage 17
4.1.3 Mechanical installation 18
4.1.4 Electrical installation 20
4.1.5 Wire cross sections (HD) 23
4.1.6 Pin assignment of the EK1914 24
4.1.7 Tested devices 28
4.3 Configuration of the EK1914 in the TwinCAT System Manager 29
4.3.1 Inserting a Beckhoff TwinSAFE Bus Coupler 29
4.3.2 Address settings on the EK1914 TwinSAFE Bus Coupler 30
4.3.3 Entering a TwinSAFE address and parameters in the System Manager 31
4.4 Diagnostics 35
4.4.1 Diagnostic LEDs 35
4.4.2 Diagnostic objects 37
4.4.3 Possible causes of diagnostic messages 39
4.5 Maintenance 41
4.5.1 Cleaning 41
4.5.2 Service life 41
4.6 Decommissioning 42
4.6.1 Disposal 42
5 Appendix 43
5.1 Beckhoff Support and Service 43
5.1.1 Beckhoff branches and partner companies Beckhoff Support 43
5.1.2 Beckhoff company headquarters 43
5.2 Certificate 44
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EK1914
Foreword
1 Foreword
1.1 Notes on the manual
This description is only intended for the use of trained specialists in control and automation technology
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
safety requirements, including all the relevant laws, regulations, guidelines and standards.
1.1.1 Disclaimer
This documentation has been prepared with care. The products described are, however, constantly under
development. For this reason, the documentation may not always have been fully checked for
consistency with the performance data, standards or other characteristics described.
If it should contain technical or editorial errors, we reserve the right to make changes at any time and
without notice.
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.
1.1.2 Brands
Beckhoff®, TwinCAT®, EtherCAT®, Safety over EtherCAT®, TwinSAFE® and XFC® are registered
trademarks of and licensed by Beckhoff Automation GmbH.
The use by third parties of other brand names or trademarks contained in this documentation may lead to
an infringement of the rights of the respective trademark owner.
1.1.3 Patents
The EtherCAT technology is patent protected, in particular by the following applications and patents:
EP1590927, EP1789857, DE102004044764, DE102007017835 with the corresponding applications and
registrations in various other countries.
The TwinCAT technology is patent protected, in particular by the following applications and patents:
EP0851348, US6167425 with the corresponding applications and registrations in various other countries.
1.1.4 Copyright
©
Beckhoff Automation GmbH & Co. KG.
The copying, distribution and utilization of this document as well as the communication of its contents to
others without express authorization is prohibited. Offenders shall be held liable for damages. All rights
conferred by patent grant or registration of a utility model or registered design are reserved.
1.1.5 Delivery conditions
In addition, the general delivery conditions of the company Beckhoff Automation GmbH & Co. KG apply.
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Foreword
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 section Product description);
• the TwinSAFE products are only operated in sound condition and in working order (see chapter
Cleaning).
• 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.
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EK1914
Foreword
1.2.3 Description of safety symbols
The following safety symbols are used in these operating instructions. They are intended to alert the
reader to the associated safety instructions.
Serious risk of injury!
DANGER
WARNING
CAUTION
Attention
Note
Failure to follow the safety instructions associated with this symbol directly endangers
the life and health of persons.
Caution - Risk of injury!
Failure to follow the safety instructions associated with this symbol endangers the life
and health of persons.
Personal injuries!
Failure to follow the safety instructions associated with this symbol can lead to injuries
to persons.
Damage to the environment or devices
Failure to follow the instructions associated with this symbol can lead to damage to the
environment or equipment.
Tip or pointer
This symbol indicates information that contributes to better understanding.
1.2.4 Origin of the document
These operating instructions were originally written in German. All other languages are derived from the
German original.
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Foreword
1.2.5 Documentation issue status
Version Comment
1.1.1
• Certificate updated
1.1.0
1.0.1
1.0.0
• Revision levels added
• Company address amended
• DateCode description added
• HFT and element classification added
• Certificate added
• First released version
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EK1914
System description
2 System description
2.1 The Beckhoff Bus Terminal system
The Beckhoff Bus Terminal system is used for decentralized connection of sensors and actuators to a
control system. The Beckhoff Bus Terminal system components are mainly used in industrial automation
and building management applications. In its minimum configuration, a bus station consists of a Bus
Coupler or a Bus Terminal Controller and Bus Terminals connected to it. The Bus Coupler forms the
communication interface to the higher-level controller, and the terminals are the interface to sensors and
actuators. The whole bus station is clipped onto a 35 mm DIN mounting rail (EN 60715). The mechanical
cross connection of the bus station is established via a slot and key system at the Bus Coupler and the
Bus Terminals.
The sensors and actuators are connected with terminals via the screwless Cage Clamp© connection
system.
In order to accommodate the wide range of different communication standards encountered in industrial
automation, Beckhoff offers Bus Couplers for a number of common bus systems (e.g. EK1100 for
EtherCAT).
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System description
2.1.1 Bus Coupler
Mechanical data
Mechanical data Bus Coupler
Material polycarbonate, polyamide (PA6.6).
Dimensions (W x H x D) 44 mm x 100 mm x 68 mm
Installation on 35 mm mounting rail (EN50022) with locking
Attachable by double slot and key connection
Connection technology
Connection
Bus Coupler
technology
Wiring single-wire conductors: direct plug-in technique
fine-wire conductor and wire end sleeve: spring actuation by screwdriver
Connection crosssection
single-wire: 0.08 to 1.5 mm²
fine-wire: 0.25 to 1.5 mm²
wire end sleeve: 0.14 to 0.75 mm²
Fieldbus connection EtherCAT
Rated voltage 24 VDC
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EK1914
System description
2.1.2 Bus Terminals
Mechanical data
Mechanical data Bus Terminal
Material polycarbonate, polyamide (PA6.6).
Dimensions (W x H x D) 12 mm x 100 mm x 68 mm or 24 mm x 100 mm x 68 mm
Installation on 35 mm mounting rail (EN50022) with locking
Attachable by double slot and key connection
Connection technology
Connection technology Bus Terminal
Wiring cage Clamp® spring-loaded system
Connection cross-section 0.08 mm2 ... 2.5 mm2, stranded wire, solid wire
Fieldbus connection E-bus
Power contacts
Current load 10 A
Rated voltage depends on Bus Terminal type
up to 3 blade/spring contacts
2.1.3 E-bus
The E-bus is the data path within a terminal strip. The E-bus is led through from the Bus Coupler through
all the terminals via six contacts on the terminals' side walls.
2.1.4 Power contacts
The operating voltage is passed on to following terminals via three power contacts. Terminal strip can be
split into galvanically isolated groups by means of potential feed terminals as required. The power feed
terminals play no part in the control of the terminals, and can be inserted at any locations within the
terminal strip.
EK1914 9
System description
2.2 TwinSAFE
2.2.1 The I/O construction kit is extended safely
With the TwinSAFE Terminals, Beckhoff offers the option of simply expanding the proven Bus Terminal
system, and to transfer the complete cabling for the safety circuit into the already existing fieldbus cable.
Safe signals can be mixed with standard signals without restriction. This saves design effort, installation
and material. Maintenance is simplified significantly through faster diagnosis and simple replacement of
only a few components.
The new ELx9xx series Bus Terminals only include three basic functionalities: digital inputs EL19xx,
digital outputs EL29xx and a logic unit EL6900. For a large number of applications, all sensors and
actuators can be wired on these Bus Terminals. The required logical link of the inputs and the outputs is
handled by the EL6900. For small to medium-sized configurations, the tasks of a fail-safe PLC can thus
be handled within the Bus Terminal system.
2.2.2 Safety concept
TwinSAFE: Safety and I/O technology in one system
• Extension of the familiar Beckhoff I/O system with TwinSAFE terminals
• Freely selectable mix of safe and standard signals
• Logical link of the I/Os in the EL6900 TwinSAFE logic terminal
• Safety-relevant networking of machines via bus systems
TwinSAFE protocol (Fail Safe over EtherCAT - FSoE)
• Transfer of safety-relevant data via any media (“genuine black channel”)
• TwinSAFE communication via fieldbus systems such as EtherCAT, Lightbus, PROFIBUS or
Ethernet
• IEC 61508:2010 SIL 3 compliant
Configuring instead of wiring: the TwinSAFE configurator
• Configuration of the TwinSAFE system via the TwinCAT System Manager
• System Manager for editing and displaying all bus parameters
• Certified function blocks such as emergency stop, operation mode, etc.
• Simple handling
• Typical function blocks for machine safety
• Any bus connection with the EL6900 TwinSAFE logic terminal
TwinSAFE logic Bus Terminal EL6900
• Link unit between TwinSAFE input and output terminals
• Configuration of a simple, flexible, cost-effective, decentralized safety controller
• No safety requirements for higher-level control system
• TwinSAFE enables networks with up to 65535 TwinSAFE devices
• TwinSAFE logic terminal can establish up to 128 connections (TwinSAFE connections).
• Several TwinSAFE logic terminals are cascadable in a network
• Safety functions such as emergency stop, protective door etc. are already included
• Suitable for applications up to SIL 3 according to IEC 61508:2010 and
DIN EN ISO 13849-1:2006 (Cat 4, PL e).
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EK1914
System description
TwinSAFE digital input (EL1904) and output terminal (EL2904)
• All current safety sensors can be connected
• Operation with a TwinSAFE logic terminal
• EL1904 with 4 fail-safe inputs for sensors (24 VDC) with floating contacts
• EL2904 with four safe channels for actuators (24 VDC, 0.5 A per channel)
• Conforming to IEC 61508:2010 SIL 3 and DIN EN ISO 13849-1:2006 (Cat 4, PL e) requirements.
2.2.3 EL1904, EL2904 - Bus Terminals with 4 fail-safe inputs or outputs
The EL1904 and EL2904 Bus Terminals enable connection of common safety sensors and actuators.
They are operated with the EL6900 TwinSAFE logic terminal. The TwinSAFE logic terminal is the link unit
between the TwinSAFE input and output terminals. It enables the configuration of a simple, flexible and
cost-effective decentralized safety control system.
Therefore, there are no safety requirements for the higher-level controller! The typical safety functions
required for the automation of machines, such as emergency stop, protective door, two-hand etc., are
already permanently programmed in the EL6900. The user configures the EL6900 terminal according to
the safety requirements of his application.
2.2.4 EL6900 - TwinSAFE logic terminal
The TwinSAFE logic terminal is the link unit between the TwinSAFE input and output terminals. The
EL6900 meets the requirements of IEC 61508:2010 SIL 3 and DIN EN ISO 13849-1:2006 (Cat 4, PL e).
2.2.5 The fail-safe principle (Fail Stop)
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.
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Product description
3 Product description
3.1 General description
EK1914 - TwinSAFE Bus Coupler with two fail-safe inputs and two fail-safe outputs
The EK1914 is an EtherCAT Bus Coupler with 4 standard inputs, 4 standard outputs, and 2 fail-safe
inputs and 2 fail-safe outputs.
The TwinSAFE Bus Coupler has the usual design of an EtherCAT coupler.
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EK1914
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