Beckhoff EL1904 User Manual

For your safety
EL190412 Version: 3.0.0
2.2 Safety image signs
On Beckhoff products you will find attached or lasered safety pictograms, which vary depending on the
product. They serve to serve to ensure safety for people and to prevent damage to the products. Safety
pictograms must not be removed and must be legible for the user.
Read and observe the operating instructions
Commissioning is only permitted if the operating instructions have been read and understood
beforehand. This applies in particular to the safety instructions and warnings.
Electrostatic sensitive components
Work with and on the TwinSAFE component is only permitted in protected workplaces.

Beckhoff EL1904 Specifications

General

Brand	Beckhoff
Model	EL1904
Category	Touch terminals
Language	English

Summary

Notes on the documentation

Disclaimer

Describes the product development, revision rights, and limitations of liability.

Safety and instruction

Guides users on reading and observing safety instructions and symbols for safe product handling.

For your safety

Duty of care

Outlines the operator's responsibilities for safe operation and compliance with instructions.

General safety instructions

Provides essential safety guidelines for product operation, installation, and maintenance.

System description

The Beckhoff Bus Terminal system

Explains the architecture and components of the Beckhoff Bus Terminal system.

TwinSAFE System

The I/O construction kit is extended safely

Details how TwinSAFE terminals expand the Bus Terminal system for safety circuits.

Safety concept

Explains the TwinSAFE safety concept, protocol, and configuration approach.

EL1904, EL2904 - Bus Terminals with 4 fail-safe inputs or outputs

Describes the EL1904 and EL2904 terminals for fail-safe inputs and outputs.

Product description

EL1904 – TwinSAFE terminal with 4 digital fail-safe inputs

Describes the EL1904 terminal, its function, and key features.

Intended use

Specifies the approved applications and purposes for TwinSAFE components.

Technical data

Lists the technical specifications, ratings, and environmental data for the EL1904.

Operation

Environmental conditions

Specifies the required environmental conditions for transport, storage, and operation.

Installation

Covers mechanical and electrical installation procedures for the terminals.

Mechanical installation

Details the physical mounting requirements and procedures for the terminals.

Electrical installation

Details the wiring and connection procedures for the terminals.

EL1904 pin assignment

Details the terminal point assignments and signals for the EL1904.

Configuration of the terminal in TwinCAT

Guides on configuring the EL1904 terminal using TwinCAT software.

Address settings on TwinSAFE terminals with 65535 possible addresses

Explains how to set TwinSAFE addresses using DIP switches.

Entering a TwinSAFE address and parameters in the System Manager

Details entering TwinSAFE addresses and parameters within the TwinCAT System Manager.

Diagnostics

Provides information on troubleshooting and interpreting diagnostic indicators.

Diagnostic LEDs

Describes the function of diagnostic LEDs for status indication.

Diagnostic objects

Explains the diagnostic objects available for monitoring terminal status and errors.

Service life

Designed Service Life

Information on the designed service life of the TwinSAFE terminals.

Maintenance and cleaning

Cleaning by the manufacturer only

States that components are maintenance-free and require manufacturer cleaning if dirty.

Decommissioning

Disposal

Provides guidelines for the correct disposal of the product and its components.

Appendix

Focus of certificates

Discusses the importance of EC type examination certificates for TwinSAFE components.