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Beckhoff EL2911 User Manual

Beckhoff EL2911
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Operation
EL2911 and EL2911-220040 Version: 2.0.0
5.3.4.1 Project design limits of EL2911
Project design limits
The maximum project design size for EL2911 is determined by the available memory. This is
managed 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
The execution time of the logic program - with identical logic program - will typically be longer compared to
the EL6910, since the safe I/O signals must be processed additionally. This also has a corresponding effect
on the processing of the I/O signals, since with increasing project size these can only be evaluated with a
lower frequency.
Process image size max. 1486byte per data direction
(maximum memory size 0x1E00 for 3 buffers, ie with the same size of
input and output process data, a maximum size of 1280 bytes per data
direction is possible. Only straight start addresses are possible, so fill
bytes must be taken into account)
TwinSAFE connections 128 max.
(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byte (telegram length 255byte)
TwinSAFE blocks maximum 512 (when using ESTOP function blocks with complete input
and output mapping, other function blocks can lead to a smaller
maximum number)
TwinSAFE groups 128 max.
TwinSAFE user 40 max.
Standard PLC inputs dynamic (memory-dependent), max. 1484byte
Standard PLC outputs dynamic (memory-dependent), max. 1484byte
NOTE
Project development
TwinCAT 3.1 Build 4022.25 or newer is required to use the internal logic functions. If the EL2911 is used as
TwinSAFE slave with the default project, at least an EL6910, EK1960 or newer logic component is required
as TwinSAFE master.

Table of Contents

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Beckhoff EL2911 Specifications

General IconGeneral
Product TypeDigital Output Terminal
Output Typerelay
Input Voltage24 V DC
Electrical Isolation500 V (E-bus/field potential)
Bus SystemEtherCAT
Relative Humidity95 %, no condensation
Protection ClassIP20
Width12 mm
Height100 mm
Rated Load Voltage30 V DC
Connection Technology2-wire
Operating Temperature-25...+60 °C
Storage Temperature-40...+85 °C
Dimensions (W x H x D)12 mm x 100 mm x 68 mm

Summary

Notes on the documentation

Disclaimer

Legal disclaimer regarding product revisions and usage.

Trademarks

List of registered and licensed trademarks of Beckhoff Automation GmbH.

Patents

Information on patent rights protecting EtherCAT technology.

Limitation of liability

Conditions under which Beckhoff's liability is excluded.

Copyright

Copyright notice and prohibition of unauthorized distribution.

Documentation issue status

Details on document version changes and updates.

Currentness

Guidance on checking for the latest document version.

Origin of the document

Information on the original language and translation.

Product features

Statement on the validity of product properties.

Version history of the TwinSAFE product

Lists software and hardware version numbers and changes.

Staff qualification

Requirements and capabilities of trained specialist personnel.

Safety and instruction

Explanation of symbols

Explanation of numbering, bullet points, and cross-references used in the document.

Pictograms

Overview of warning pictograms and signal words for safety notices.

Beckhoff Support and Service

Contact information for technical support, training, and service.

For your safety

Duty of care

Operator's responsibility to comply with instructions and maintain legibility.

Safety image signs

Explanation of safety pictograms attached or lasered on products.

General safety instructions

Guidelines for safe operation, including before, during, and after use.

Before operation

Safety checks and requirements prior to operating the component.

In operation

Precautions for safe operation and interference avoidance.

After operation

Safety measures for de-energizing and switching off components.

System description

The Beckhoff EtherCAT Terminal system

Overview of the decentralized connection system for sensors and actuators.

EtherCAT Bus Coupler

Technical specifications and connection technology of the EtherCAT Bus Coupler.

EtherCAT Terminals

Mechanical data and connection technology of EtherCAT Terminals.

E-bus

Description of the E-bus as the data path within a terminal strip.

Power contacts

Explanation of power contacts for voltage supply to terminals.

TwinSAFE

Introduction to the integrated TwinSAFE safety solution.

The I/O construction kit is extended safely

How TwinSAFE components extend the I/O kit for safety applications.

Safety concept

Overview of TwinSAFE's safety and I/O technology integration.

The fail-safe principle (Fail Stop)

Core principle that system failure must not lead to a dangerous condition.

Product description

EL2911 and EL2911-2200

Description of the EL2911 as a potential feed terminal with fail-safe inputs.

Intended use

Permissible applications for TwinSAFE components in machine safety.

Requirements for the potential group

Measures for preventing feedback and ensuring safety levels.

Technical data

Comprehensive technical specifications for the EL2911 and EL2911-2200.

Safety parameters

Key safety data including lifetime, PFHD, and performance levels.

Safe inputs and outputs

Description of consolidated safe inputs and single-channel safe output.

Characteristic curve of the inputs

Details on the input characteristic curve according to EN 61131-2.

Dimensions

Physical dimensions of the EL2911 terminal.

Operation

Environmental conditions

Specifies permissible conditions for transport, storage, and operation.

Installation

General guidelines and safety instructions for installing the components.

Safety instructions

Advises reading safety instructions in the foreword before installation.

Transport / storage

Recommendations for using original packaging and observing environmental conditions.

Mechanical installation

Safety warnings and procedures for installing devices on mounting rails.

Instructions for ESD protection

Guidelines for preventing damage from electrostatic discharge during handling.

Control cabinet / terminal box

Requirement for installing terminals in a control cabinet with IP54 protection.

Installation position and minimum distances

Prescribed horizontal installation and required clearances for cooling.

Temperature measurement

Information on internal temperature measurement and critical thresholds.

Notes on the arrangement of TwinSAFE components

Guidance on favorable and unfavorable terminal arrangements for thermal management.

Installation on mounting rails

Step-by-step instructions for attaching components to mounting rails.

Electrical installation

Procedures for making electrical connections within a bus terminal block.

Connections within a Bus Terminal block

Details on spring contacts (E-bus) and power contacts.

PE power contact

Information on the PE power contact for protective earth and its usage.

Overvoltage protection

Recommendation for surge filters to protect against overvoltage.

Wiring

Instructions and table for connecting cables to terminal points.

Connection

Pin assignment details for the EL2911 terminal.

Signal cables

Guidelines for routing signal cables separately from interference sources.

Configuration of the terminal in TwinCAT

Inserting a Bus Coupler

Instructions for adding a Bus Coupler in TwinCAT software.

Inserting a Bus Terminal

Instructions for adding a Bus Terminal in TwinCAT software.

Adding an EL2911

Steps for adding the EL2911 terminal within TwinCAT.

EL2911: using the integrated TwinSAFE Logic functions

How to utilize the EL2911's integrated TwinSAFE logic functionality.

Project design limits of EL2911

Maximum project design sizes and limits for EL2911 configuration.

Address settings on TwinSAFE terminals with 1023 possible addresses

Procedure for setting terminal addresses using DIP switches.

Alias devices

Creation and use of alias devices for I/O configuration in TwinCAT.

EL2911 parameters in TwinCAT

Parameterization of the EL2911 alias device within TwinCAT.

EL2911 process image

Structure and assignment of process data for the EL2911.

TwinSAFE reaction times

Determination of system reaction time from sensor to actuator.

Diagnosis

Status LEDs

Description of status LEDs for input and output status.

Diagnostic LEDs

Explanation of diagnostic LEDs indicating system status and errors.

Logic error codes

Codes for logic and environment errors displayed via diagnostic LEDs.

Flash code display

Description of LED flashing and flickering patterns for error codes.

Diagnosis History

How diagnostic messages are saved and read from a CoE object.

Diag History tab

Accessing and updating the diagnostic history of TwinSAFE components.

Service life

Maintenance and cleaning

Decommissioning

Disposal

Procedures for correct disposal of components according to regulations.

Returning to the vendor

Information on returning used devices for professional disposal.

Appendix

Volatility

Discussion on volatile and non-volatile components and data security.

Focus of certificates

Information on EC type examination certificates and their validity.

Certificate

Details of the EC Declaration of Conformity for the EL2911.

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