Beckhoff EL1918 Operating Instructions Manual

Brand: Beckhoff

Model: EL1918

Type: Operating Instructions Manual

Operating Instructions for

EL1918

TwinSAFE Terminal with 8 digital fail-safe inputs

1.2.0

2018-11-05

Version:

Date:

Table of contents

EL1918 3Version: 1.2.0

Table of contents

1 Foreword ....................................................................................................................................................5

1.1 Notes on the documentation..............................................................................................................5

1.2 Safety instructions .............................................................................................................................6

1.2.1 Delivery state ..................................................................................................................... 6

1.2.2 Operator's obligation to exercise diligence ........................................................................ 6

1.2.3 Description of safety symbols ............................................................................................ 7

1.3 Documentation issue status ..............................................................................................................7

1.4 Version history of the TwinSAFE product..........................................................................................8

1.5 References ........................................................................................................................................8

2 System description ...................................................................................................................................9

2.1 The Beckhoff EtherCAT Terminal system .........................................................................................9

2.1.1 EtherCAT Bus Coupler .................................................................................................... 10

2.1.2 EtherCAT Terminals ........................................................................................................ 11

2.1.3 E-bus ............................................................................................................................... 11

2.1.4 Power contacts ................................................................................................................ 11

2.2 TwinSAFE........................................................................................................................................12

2.2.1 The I/O construction kit is extended safely ...................................................................... 12

2.2.2 Safety concept ................................................................................................................. 12

2.2.3 The fail-safe principle (Fail Stop) ..................................................................................... 13

3 Product description.................................................................................................................................14

3.1 EL1918 – TwinSAFE Terminal with 8 digital fail-safe inputs ...........................................................14

3.2 Intended use....................................................................................................................................15

3.3 Technical data .................................................................................................................................17

3.4 Safety parameters ...........................................................................................................................18

3.5 Safe input ........................................................................................................................................18

3.6 Characteristic curve of the inputs ....................................................................................................19

3.7 Dimensions......................................................................................................................................20

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 ........................................................................................................ 28

4.3 Configuration of the terminal in TwinCAT........................................................................................33

4.3.1 Inserting a Bus Coupler ................................................................................................... 33

4.3.2 Inserting a Bus Terminal.................................................................................................. 33

4.3.3 Adding an EL1918 ........................................................................................................... 33

4.3.4 Address settings on TwinSAFE terminals with 1023 possible addresses ....................... 34

4.3.5 Alias devices.................................................................................................................... 35

4.3.6 EL1918 parameters in TwinCAT...................................................................................... 36

4.3.7 Process image of the EL1918.......................................................................................... 38

4.3.8 Local logic function .......................................................................................................... 39

Table of contents

EL19184 Version: 1.2.0

4.3.9 Project design limits of EL1918 ....................................................................................... 40

4.4 TwinSAFE reaction times ................................................................................................................40

4.5 Diagnosis.........................................................................................................................................43

4.5.1 Status LEDs..................................................................................................................... 43

4.5.2 Diagnostic LEDs .............................................................................................................. 43

4.5.3 Flash code display ........................................................................................................... 44

4.5.4 Diagnosis History............................................................................................................. 44

4.5.5 Diag History tab ............................................................................................................... 47

4.6 Maintenance ....................................................................................................................................48

4.7 Service life .......................................................................................................................................49

4.8 Decommissioning ............................................................................................................................49

4.9 Firmware update of TwinSAFE products.........................................................................................50

5 Appendix ..................................................................................................................................................53

5.1 Support and Service ........................................................................................................................53

5.2 Certificates.......................................................................................................................................54

Foreword

EL1918 5Version: 1.2.0

1 Foreword

1.1 Notes on the documentation

Intended audience

This description is only intended for the use of trained specialists in control and automation engineering who

are familiar with the applicable national standards.

It is essential that the following notes and explanations are followed when installing and commissioning

these components.

The responsible staff must ensure that the application or use of the products described satisfy all the

requirements for safety, including all the relevant laws, regulations, guidelines and standards.

Origin of the document

This 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 [}53].

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P

, SafetyoverEtherCAT

, TwinSAFE

, XFC

and XTS

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, DE102004044764, DE102007017835 with corresponding applications or

registrations in various other countries.

The TwinCAT Technology is covered, including but not limited to the following patent applications and

patents: EP0851348, US6167425 with corresponding applications or registrations in various other countries.

Foreword

EL19186 Version: 1.2.0

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

EL1918 7Version: 1.2.0

1.2.3 Description of safety symbols

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

1.2.0 • Project design limits added

1.1.0 • Restrictions on channel usage added

• Note added for commissioning

1.0.0 • Certificate added

• Connection added

• First released version

0.0.3 • System limits added

• Description of Module Fault Link active parameter added.

• Version history updated

• References added

• Description of local logic function added

• Foreword updated

• Safety instructions adapted to IEC 82079-1.

0.0.2 • Update after review

0.0.1 • First draft

Foreword

EL19188 Version: 1.2.0

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 [}50].

Date Software ver-

sion

Hardware

version

Modifications

03.08.2018 01 00 First release of the EL1918

1.5 References

No Version Title / description

[1] 1.6.0 or newer Operating instructions for EL6910

The document contains a description of the logic functions of the EL6910

and their programming

[2] 3.1.0 or newer Documentation – TwinSAFE Logic FB

The document describes the safety function blocks that are available in the

EL6910 and form the safety application.

System description

EL1918 9Version: 1.2.0

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

EL191810 Version: 1.2.0

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

EL1918 11Version: 1.2.0

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

EL191812 Version: 1.2.0

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

EL1918 13Version: 1.2.0

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

EL191814 Version: 1.2.0

3 Product description

3.1 EL1918 – TwinSAFE Terminal with 8 digital fail-safe

inputs

The EL1918 is a digital input terminal for sensors with potential-free contacts for 24V

. The TwinSAFE

Terminal has 8 fail-safe inputs.

With a two-channel connection, the EL1918 meets the requirements of IEC61508:2010SIL3 and

ENISO13849-1:2015(Cat4, PLe). See chapter Safe input [}18].

The TwinSAFE terminal has the typical design of an EtherCAT HD Terminal.

Fig.4: EL1918 – TwinSAFE Terminal with 8 fail-safe inputs

Product description

EL1918 15Version: 1.2.0

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 EL6900 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 EL1918 can be used for the safety-related task, a commissioning test must be carried out by the

user so that wiring errors to the sensors can be ruled out.

CAUTION

Follow the machinery directive!

The TwinSAFE components may only be used in machines as defined in the machinery directive.

Product description

EL191816 Version: 1.2.0

CAUTION

Ensure traceability!

The buyer has to ensure the traceability of the device via the serial number.

CAUTION

Note on approval according to EN 81-20, EN 81-22 and EN 81-50

• The TwinSAFE components may only be used in machines that have been designed and installed in ac-

cordance with the requirements of the EN60204-1 standard.

• Provide a surge filter for the supply voltage of the TwinSAFE components against overvoltages. (Reduc-

tion to overvoltage category II)

• EN81 requires that in the case of devices with internal temperature monitoring, a stop must be reached

in the event of an overtemperature. In this case, passengers must be able to disembark (see EN81-20

chapter 5.10.4.3, for example). To ensure this, application measures are necessary. The internal termi-

nal temperature of the TwinSAFE components can be read out by the user. There is a direct switch-off at

the maximum permissible temperature of the respective TwinSAFE component (see chapter Tempera-

ture measurement).

The user must select a temperature threshold below the maximum temperature such that a stop can be

reached in all cases before the maximum temperature is reached. Information on the optimum terminal

configuration can be found under Notes on the arrangement of TwinSAFE components and under Exam-

ple configuration for temperature measurement.

• For the use of the TwinSAFE components according to EN81-22 and EN81-50, the conditions de-

scribed in the manuals for achieving category4 according to ENISO13849-1:2015 must be observed.

• The use of TwinSAFE components is limited to indoor applications.

• Basic protection against direct contact must be provided, either by fulfilling protection class IP2X or by

installing the TwinSAFE components in a control cabinet which corresponds at least to protection class

IP54 according to EN60529.

• The ambient conditions regarding temperature, humidity, heat dissipation, EMC and vibrations, as speci-

fied in the operating instructions under technical data, must be observed.

• The operating conditions in potentially explosive atmospheres (ATEX) are specified in the operating in-

structions.

• The safe state (triggering) of the application must be the de-energized state. The safe state of the Twin-

SAFE components is always the de-energized, switched-off state, and this cannot be changed.

• The service life specified in the operating instructions must be observed.

• If the TwinSAFE component is operated outside the permissible temperature range, it changes to

"Global Shutdown" state.

• The TwinSAFE components must be installed in a control cabinet with protection class IP54 according to

EN60529, so that the requirement for contamination level3 according to EN60664-1 can be reduced to

level2.

• The TwinSAFE components must be supplied by a SELV/PELV power supply unit with a maximum volt-

age of U

max

<=36V

Product description

EL1918 17Version: 1.2.0

3.3 Technical data

Product designation EL1918

Number of inputs 8

Status display 12 (one green LED per input + 4 DIAG LEDs)

Reaction time (read input/write to E-bus) typically: 4ms,

maximally: see error reaction time

Fault response time ≤ watchdog time

Cable length between sensor and terminal unshielded max. 100m (0.75 or 1mm²)

shielded max. 100m (0.75 or 1mm²)

Output current of the clock outputs typically 3mA, max. 6.5mA

Input process image 7bytes

Output process image 6bytes

Supply voltage of the EL1918 (PELV) 24V

(–15%/+20%)

Signal voltage "0" inputs

-3V ... 5V (EN61131-2, type 3) see chapter Characteristic curve

of the inputs [}19]

Signal voltage "1" inputs

11V ... 30V (EN61131-2, type 3) see chapter Characteristic

curve of the inputs [}19]

Current consumption of the module electronics at 24V (without cur-

rent consumption of sensors)

8 channels occupied: typically 29.6mA (@28.8V

)

0 channel occupied: typically 2.27mA (@28.8V

)

Current consumption via E-bus 8 channels occupied: approx. 165mA

Power dissipation of the terminal typically 1.6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. 50g

Permissible ambient temperature (operation)

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

[}23])

Permissible ambient temperature (transport/storage) -40 °C to +70 °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 contamination level

according to EN 60664-1

Contamination level 2

(note chapter Maintenance [}48])

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

contamination of the TwinSAFE component

EMC immunity/emission conforms to EN61000-6-2/EN61000-6-4

Vibration / shock resistance conforms to EN60068-2-6/EN60068-2-27

Shocks 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

EL191818 Version: 1.2.0

3.4 Safety parameters

Characteristic numbers EL1918

Lifetime [a] 20

Prooftest Interval [a] not required

PFH

3.00 E-09

PFD 4.90 E-05

MTTF

high

DC high

Performance level PL e

Category 4

HFT 1

Element classification

Type B

1. Special proof tests are not required during the entire service life of the EL1918 EtherCAT terminal.

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

The EL1918 EtherCAT Terminal can be used for safety-related applications within the meaning of

IEC61508:2010 up to SIL3 and ENISO13849-1:2015 up to PL e (Cat4).

Further information on calculating or estimating the MTTF

value from the PFH

value can be found in the

TwinSAFE application manual 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.

3.5 Safe input

The safe inputs and associated clock outputs are implemented as a single channel for each module. This

has the advantage that any channels, e.g. for a two-channel safe sensor, can be combined and used. For

error evaluation of these two channels, the Module Fault Link active parameter of the two modules involved

must be set to TRUE. This is the default state of this parameter.

DANGER

Clocked signals inside a sheathed cable

If clocked signals (clock outputs for the safe inputs) of different modules are used within a sheathed cable,

a fault of one module, such as cross-circuit or external feed, must lead to the disconnection of all of these

modules. This is achieved by setting the Module Fault Link active parameter for all modules involved. This

parameter is set to TRUE by default.

DANGER

Safe inputs in Kat.4 / PL e

If two safe input channels are to be used in a Category 4 structure, please ensure that you always combine

an even and an odd channel number.

Product description

EL1918 19Version: 1.2.0

3.6 Characteristic curve of the inputs

The characteristic curve of the inputs is similar to type 3 according to EN 61131-2.

Fig.5: Characteristic curve of the inputs

Product description

EL191820 Version: 1.2.0

3.7 Dimensions

Fig.6: EL1918 dimensions

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

Height: 100mm

Depth: 68mm

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