Beckhoff TwinSAFE EL2912 Operating Instructions Manual

Brand: Beckhoff

Model: TwinSAFE EL2912

Type: Operating Instructions Manual

Operating Instructions for

EL2912

TwinSAFE Terminal with 2 digital fail-safe outputs

1.0.0

2019-09-06

Version:

Date:

Table of contents

EL2912 3Version: 1.0.0

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 ..............................................................................................................7

1.4 Version history of the TwinSAFE product..........................................................................................7

2 System description ...................................................................................................................................8

2.1 The Beckhoff EtherCAT Terminal system .........................................................................................8

2.1.1 EtherCAT Bus Coupler ...................................................................................................... 9

2.1.2 EtherCAT Terminals ........................................................................................................ 10

2.1.3 E-bus ............................................................................................................................... 10

2.1.4 Power contacts ................................................................................................................ 10

2.2 TwinSAFE........................................................................................................................................11

2.2.1 The I/O construction kit is extended safely ...................................................................... 11

2.2.2 Safety concept ................................................................................................................. 11

2.2.3 The fail-safe principle (Fail Stop) ..................................................................................... 12

3 Product description.................................................................................................................................13

3.1 EL2912 - TwinSAFE terminal with two fail-safe outputs..................................................................13

3.2 Intended use....................................................................................................................................14

3.3 Technical data .................................................................................................................................16

3.4 Safety parameters ...........................................................................................................................17

3.5 Safe output ......................................................................................................................................18

3.6 Fuse.................................................................................................................................................18

3.7 Dimensions......................................................................................................................................18

3.8 Using the integrated TwinSAFE Logic functions .............................................................................19

3.9 Project design limits for the EL2912 ................................................................................................19

4 Operation..................................................................................................................................................21

4.1 Environmental conditions ................................................................................................................21

4.2 Installation .......................................................................................................................................21

4.2.1 Safety instructions ........................................................................................................... 21

4.2.2 Transport / storage .......................................................................................................... 21

4.2.3 Mechanical installation..................................................................................................... 21

4.2.4 Electrical installation ........................................................................................................ 27

4.3 Configuration of the terminal in TwinCAT........................................................................................32

4.3.1 Inserting a Bus Coupler ................................................................................................... 32

4.3.2 Inserting a Bus Terminal.................................................................................................. 32

4.3.3 Adding an EL2912 ........................................................................................................... 32

4.3.4 Address settings on TwinSAFE terminals with 1023 possible addresses ....................... 33

4.3.5 Alias devices.................................................................................................................... 34

4.3.6 EL2912 parameters in TwinCAT...................................................................................... 35

4.3.7 EL2912 process image .................................................................................................... 37

Table of contents

EL29124 Version: 1.0.0

4.4 TwinSAFE reaction times ................................................................................................................37

4.5 Diagnostics ......................................................................................................................................39

4.5.1 Status LEDs..................................................................................................................... 39

4.5.2 Diagnostic LEDs .............................................................................................................. 39

4.5.3 Flash code display ........................................................................................................... 40

4.5.4 Diagnostic objects............................................................................................................ 40

4.5.5 Cycle time of the safety project........................................................................................ 42

4.5.6 Diagnosis History............................................................................................................. 43

4.5.7 Diag History tab ............................................................................................................... 46

4.6 Maintenance ....................................................................................................................................47

4.7 Service life .......................................................................................................................................48

4.8 Decommissioning ............................................................................................................................48

4.9 Firmware update of TwinSAFE products.........................................................................................49

5 Appendix ..................................................................................................................................................52

5.1 Support and Service ........................................................................................................................52

5.2 Certificates.......................................................................................................................................53

Foreword

EL2912 5Version: 1.0.0

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 documentation was originally written in German. All other languages are derived from the German

original.

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.com/english/download/twinsafe.htm.

In case of doubt, please contact Technical Support [}52].

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

, 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.

Foreword

EL29126 Version: 1.0.0

EtherCAT

and Safety over EtherCAT

are registered trademarks and patented technologies, licensed by

Beckhoff Automation GmbH, Germany.

The reproduction, distribution and utilization of this document as well as the communication of its contents to

others without express authorization are prohibited.

patent, utility model or design.

Delivery conditions

In addition, the general delivery conditions of the company Beckhoff Automation GmbH & Co. KG apply.

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

EL2912 7Version: 1.0.0

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.

1.3 Documentation issue status

Version Comment

1.0.0 • First release of the documentation

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.

A description of how a firmware (software) update can be performed can be found in chapter Firmware

update of TwinSAFE products [}49].

Date Software ver-

sion

Hardware

version

Modifications

24.07.2019 01(V01.04) 00 First release of the EL2912

System description

EL29128 Version: 1.0.0

2 System description

2.1 The Beckhoff EtherCAT Terminal system

The Beckhoff EtherCAT Terminal system is used for decentralized connection of sensors and actuators to a

controller. The components of the Beckhoff EtherCAT Terminal system are mainly used in industrial

automation and building management systems. As a minimum, a bus station consists of an EtherCAT

Coupler and connected EtherCAT Terminals. The EtherCAT Coupler forms the communication interface to

the higher-level controller, while the EtherCAT Terminals form the interface to the sensors and actuators.

The whole bus station is clipped onto a 35mm DIN mounting rail (EN 60715). The mechanical link of the bus

station is established with a slot and key system on EtherCAT Couplers and EtherCAT Terminals.

The sensors and actuators are connected with the terminals via the screwless (spring-loaded) connection

system.

Fig.1: Slot and key system and screwless (spring-loaded) connection system

System description

EL2912 9Version: 1.0.0

2.1.1 EtherCAT Bus Coupler

Mechanical data Bus Coupler

Material polycarbonate, polyamide (PA6.6).

Dimensions (W x H x D) 44mm x 100mm x 68mm

Mounting on 35 mm mounting rail (EN60715) with locking

Attachable by double slot and key connection

Fig.2: Bus Coupler (EtherCAT)

Connection technology Bus Coupler

Wiring Spring-loaded system

Connection cross-section 0.08mm² ... 2.5mm², stranded wire, solid wire

Fieldbus connection EtherCAT

Power contacts 3 spring contacts

Current load 10A

Nominal voltage 24V

System description

EL291210 Version: 1.0.0

2.1.2 EtherCAT Terminals

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

Mounting on 35 mm mounting rail (EN60715) with locking

Attachable by double slot and key connection

Fig.3: Overview of EtherCAT Terminals

Connection technology Bus Terminal

Wiring Spring-loaded system

Connection cross-section typically 0.08mm² – 2.5mm², stranded wire, solid wire

Communication E-bus

Power contacts Up to 3 blade/spring contacts

Current load 10A

Nominal voltage Depending on terminal type (typically 24 V

)

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 supply terminals as required. The supply

terminals play no part in the control of the terminals, and can be inserted at any locations within the terminal

strip.

System description

EL2912 11Version: 1.0.0

2.2 TwinSAFE

2.2.1 The I/O construction kit is extended safely

The integrated TwinSAFE safety solution is the logical continuation of the open, PC-based Beckhoff control

philosophy. Due to their modularity and versatility, the TwinSAFE components fit seamlessly into the

Beckhoff control system. The I/O components are available in the formats Bus Terminal, EtherCAT Terminal,

EtherCAT plug-in module and EtherCAT Box.

Thanks to the fieldbus-neutral safety protocol (TwinSAFE/Safety-over-EtherCAT), TwinSAFE devices can be

integrated into any fieldbus system. They are integrated into existing networks with K-bus or EtherCAT and

can be used directly in the machine as IP67 modules. These safety I/Os form the interfaces to the safety-

relevant sensors and actuators.

The possibility to transmit the safety-relevant signals over a standard bus system gives rise to substantial

advantages in terms of planning, installation, operation, maintenance, diagnostics and costs.

The safety application is configured or programmed respectively in the TwinCAT software. This application is

then transferred via the bus to a TwinSAFE logic component. These form the heart of the TwinSAFE system.

All safety devices in the system communicate with this logic component. Due to the enormous flexibility of

the system, several TwinSAFE logic components can also be operated simultaneously in a network.

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

• Logic link of the I/Os in the TwinSAFE logic component, e.g. EL6910

• Safety-relevant networking of machines via bus systems

TwinSAFE protocol (FSoE / Safety-over-EtherCAT)

• 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

TwinCAT software and TwinSAFE editor

• Safety application is configured or programmed in the TwinCAT software

• Certified function blocks such as emergency stop, operation mode, etc.

• simple handling

• Transfer of the application via the bus to the TwinSAFE logic component

TwinSAFE logic component, e.g. EL6910

• Processing of the safety-related application and communication with the TwinSAFE terminals

• No safety requirements for higher-level control system

• TwinSAFE enables a network with up to 65,535 TwinSAFE components.

• TwinSAFE logic component can establish up to 512 connections (TwinSAFE connections).

• Several TwinSAFE logic components can be operated in a network

• Suitable for applications up to SIL 3 according to IEC 61508:2010 and category 4 / PL e according to

ENISO13849-1:2015.

System description

EL291212 Version: 1.0.0

TwinSAFE I/O components

• The TwinSAFE I/O components are available in the formats Bus Terminal, EtherCAT Terminal,

EtherCAT plug-in module, EtherCAT Box and TwinSAFE Drive option card

• All common safety sensors and actuators can be connected

• Operation with a TwinSAFE logic component

• Typically meet the requirements of IEC 61508:2010 up to SIL 3 and ENISO13849-1:2015 up to

Category 4, PLe. More detailed information can be found in the respective user documentation

2.2.3 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.

CAUTION

Safe state!

The safe state of the TwinSAFE system is always the switched-off and de-energized state.

Product description

EL2912 13Version: 1.0.0

3 Product description

3.1 EL2912 - TwinSAFE terminal with two fail-safe outputs

The EL2912 is a safe output terminal with two fail-safe outputs, each with 2A (24V

The EL2912 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).

The TwinSAFE terminal has the typical design of a 12mm EtherCAT Terminal. The outputs use the voltage

of the power contacts. In addition, the voltage of the power contacts is applied to terminal points 2/6 and 3/7.

The terminal points GND1, GND2 and GND U

(terminal points 3/7) are directly connected internally.

Fig.4: EL2912 - TwinSAFE terminal with two fail-safe outputs

Product description

EL291214 Version: 1.0.0

3.2 Intended use

WARNING

Caution - Risk of injury!

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

The TwinSAFE Terminals expand the application area of Beckhoff Bus Terminal system with functions that

enable them to be used for machine safety applications. The TwinSAFE Terminals 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 switched-off and de-energized state. Fail-

safety according to the relevant standards is required.

The TwinSAFE I/O components allow the connection of:

• 24V

sensors such as

emergency stop push-buttons, rope pull switches, position switches, two-hand switches, safety

switching mats, light curtains, light barriers, laser scanners, etc.

• 24V

actuators such as

contactors, protective door switches with tumbler, signal lamps, servo drives, etc.

Test pulses

When selecting actuators please ensure that the test pulses of the TwinSAFE component do not

lead to switching of the actuator or a diagnostic message of the TwinSAFE component.

The following TwinSAFE components were developed for these tasks:

• The EL1904 is an EtherCAT Terminal with 4 digital fail-safe inputs

• The EL2904 is an EtherCAT Terminal with 4 digital fail-safe outputs

• The EL6910 is an EtherCAT Terminal with integrated TwinSAFE logic

These TwinSAFE components are suitable for operation on the

• Beckhoff EKxxxx series Bus Couplers

• Beckhoff CXxxxx series Embedded PCs with E-bus connection

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

Power supply from SELV/PELV power supply unit!

The TwinSAFE components must be supplied with 24V

by an SELV/PELV power supply unit with an out-

put voltage limit U

max

of 36V

. Failure to observe this can result in a loss of safety.

WARNING

Commissioning test

Before the EL2912 can be used for safety-related tasks, a commissioning test must be carried out by the

user so that faulty sensor wiring can be ruled out.

Product description

EL2912 15Version: 1.0.0

CAUTION

Follow the machinery directive!

The TwinSAFE components may 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

EL291216 Version: 1.0.0

3.3 Technical data

Product designation EL2912

Number of outputs 2

Status display 4 (one green and one red LED for each output)

Fault response time ≤ watchdog times

Output current per channel max. 2A (at 24V

)

Actuators When selecting actuators please ensure that the EL2912 test

pulses do not lead to actuator switching.

Cable length between actuator and terminal unshielded max. 100m

shielded max. 100m

Wire cross-section min. 0.75mm

Input process image 6bytes

Output process image 6bytes

Supply voltage of the EL2912 (SELV/PELV) 24V

(–15%/+20%)

(A 10A fuse should be provided for the potential group)

Current consumption via E-bus approx. 200mA

Power dissipation of the terminal typically 1.7W

Electrical isolation (between the channels) no

Electrical isolation (between the channels and the E-bus) yes

Insulation voltage (between the channels and the E-bus, under com-

mon operating conditions)

Insulation tested with 500V

Dimensions (WxHxD) 12 mm x 100 mm x 68 mm

Weight approx.55g

Permissible ambient temperature (operation)

-25°C to +55°C (note chapter Temperature measurement

[}23])

Permissible ambient temperature (transport/storage) -40°C to +85°C

Permissible air humidity 5% to 95%, non-condensing

Permissible air pressure (operation/storage/transport) 750hPa to 1100hPa

(this corresponds to an altitude of approx. -690m to 2450m

above sea level, assuming an international standard atmos-

phere)

Climate category according to EN60721-3-3 3K3

(the deviation from 3K3 is possible only with optimal environmen-

tal conditions and also applies only to the technical data which

are specified differently in this documentation)

Permissible level of contamination

according to EN 60664-1

level of contamination 2

(note chapter Maintenance [}47])

Inadmissible operating conditions TwinSAFE Terminals must not be used under the following oper-

ating conditions:

• under the influence of ionizing radiation (exceeding the

natural background radiation)

• in corrosive environments

• in an environment that leads to unacceptable soiling of

the Bus Terminal

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/s

peak)

Shock resistance conforms to EN60068-2-27

15g with pulse duration 11ms in all three axes

Protection class IP20

Permitted operating environment In the control cabinet or terminal box, with minimum protection

class IP54 according to IEC60529

Correct installation position

see chapter Installation position and minimum distances [}22]

Approvals CE, TÜV SÜD

Product description

EL2912 17Version: 1.0.0

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 temperature

0 to 2000

1.0

3000 0.9

4000 0.8

5000 0.7

Note: Linear interpolation is permissible between the altitudes

Ambient temperature of the device at an altitude of 2000m

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

Characteristic numbers EL2912

Lifetime [a] 20

Prooftest Interval [a] not required

PFH

2.88 E-09

PFD 2.55 E-05

MTTF

high

DC high

Performance level PL e

Category 4

HFT 1

Element classification

Type B

No special proof tests are required during the entire service life of the EL2912.

Classification according to IEC 61508-2:2010 (chapter 7.4.4.1.2 and 7.4.4.1.3)

The EL2912 EtherCAT Terminal can be used for safety-related applications within the meaning of

EN61508:2010 up to SIL3 and ENISO13849-1:2015 up to PL e (Cat4).

Further information on calculating or estimating the MTTF

value from the PFH

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

EL291218 Version: 1.0.0

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 Fuse

Power supply of the power contacts

The safe outputs are supplied from the power contacts. The current carrying capacity of the power contacts

is limited to 10A. The power supply of the power contacts for each potential group must be protected with a

10A fuse.

3.7 Dimensions

Fig.5: EL2912 - Dimensions

Width: 12mm (side-by-side installation)

Height: 100mm

Depth: 68mm

Product description

EL2912 19Version: 1.0.0

3.8 Using the integrated TwinSAFE Logic functions

On delivery, the EL2912 behaves like a safe TwinSAFE I/O slave, which can be used as an alias device

within a TwinSAFE Logic, e.g. EL6910.

Alternatively, the local logic function of the EL2912 can be used. To this end please create a TwinSAFE

project in the Safety Editor and select the EL2912 as the target system. Further information on creating a

project can be found in the EL6910 documentation and the description of the function blocks under http://

www.beckhoff.de/english/download/twinsafe.htm.

In order to be able to use the EL2912 again as a safe TwinSAFE I/O slave, please delete the logic, the

mapping and the parameter data on the EtherCAT Terminal and switch the voltage off and on again.

Fig.6: Delete project data

3.9 Project design limits for the EL2912

Project design limits

The maximum project design size of the EL2912 is limited by the available memory. This is man-

aged dynamically. The values specified in the following table are therefore only guide values and

may differ from the actual values, depending on the safety project.

NOTE

Execution time of the logic function

Compared to the EL6910 with an identical logic program, the execution time will be typically longer as the

safe I/O signals have to be processed in addition. Accordingly this also affects the processing of the I/O sig-

nals, as they can only be evaluated less frequently as the size of the project increases.

Product description

EL291220 Version: 1.0.0

Process image size max. 1486bytes per data direction

(max. memory size 0x1E00 for 3 buffers, i.e. with identical input and

output process data sizes the maximum size is 1280 bytes per data

direction. Only even-numbered start addresses are possible, therefore

padding bytes may have to be included)

TwinSAFE connections maximum 212

(up to 255 CRCs in total; 1 CRC is required for a TwinSAFE connection

with 1 or 2 byte safe data.)

Safe data per TwinSAFE

connection

maximum 126bytes (telegram length 255bytes)

TwinSAFE function blocks maximum 512 (For using ESTOP function blocks with complete input and

output mapping. Other function blocks may lead to a lower maximum

number.)

TwinSAFE groups maximum 128

TwinSAFE user maximum 40

Standard PLC inputs dynamic (memory-dependent), max. 1484bytes

Standard PLC outputs dynamic (memory-dependent), max. 1484bytes

NOTE

Project planning

TwinCAT 3.1 Build 4022 or later is required for the use of the internal logic functions. If the EL2912 is used

as a TwinSAFE slave with the default project, at least an EL6910, EK1960 or newer logic components are

required as a TwinSAFE master.

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Beckhoff TwinSAFE EL2912 Operating Instructions Manual

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Type: Operating Instructions Manual

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Beckhoff TwinSAFE EL2912 Operating Instructions Manual

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