BECKHOFF EL1819 16-Channel Digital Input Terminal

Product Overview

The EL1819 (EL1819) is a High-Density (HD) digital input terminal designed for high-performance automation systems requiring space-efficient signal acquisition. With 16 digital input channels in a compact 12 mm wide housing, it is ideal for modern control cabinets where footprint optimization is a priority. This terminal processes 24 V DC signals with a rapid input filter time of 10 µs, making it suitable for high-speed switching applications and status monitoring in industrial environments ranging from manufacturing lines to complex process control infrastructures.

Technical Configuration

The EL1819 employs 1-wire connection technology, significantly reducing the amount of wiring required compared to multi-wire terminal blocks. It fully complies with the EN 61131-2 Type 1/3 specification, ensuring seamless integration with standard 24 V DC sensors. The module requires no manual addressing or complex configuration, as it is automatically identified by the EtherCAT master during network initialization. Its electrical isolation of 500 V between the E-bus and field potential guarantees reliable data transmission even in electrically noisy industrial zones.

Technical Specifications

FAQs

What is the advantage of the 1-wire connection technology?

The 1-wire connection allows sensors to be wired directly to the terminal, reducing the number of terminal blocks and jumper wires needed in the cabinet. This design saves both space and installation labor.

Is this terminal suitable for ATEX-rated hazardous zones?

Yes, the EL1819 carries the ATEX marking (II 3 G Ex nA IIC T4 Gc), provided it is installed in a suitable housing and used within the specified operating limits for hazardous atmospheres.

Does the EL1819 support Distributed Clocks?

No, the EL1819 does not support Distributed Clocks. It is intended for standard digital input acquisition where high-speed synchronous time-stamping is not a requirement.

How should I handle wire stripping for these terminals?

Use a precise stripping length of 8–9 mm. The spring-actuated terminals are designed for both solid and stranded wires (with ferrules), and this stripping length ensures a secure connection without exposing bare copper beyond the terminal housing.

Installation Guidelines and Best Practices

• High-Density Wiring: Because this is an HD terminal, the cabling can become dense. Use color-coded ferrules or wire labels to clearly distinguish between the 16 channels to simplify future maintenance and signal tracing.
• Thermal Management: Although the EL1819 is efficient, mounting multiple HD terminals side-by-side in a heavily loaded cabinet can lead to localized heat buildup. Ensure natural convection paths are not blocked by cable ducts or external components.
• Grounding: Always ensure the common ground for your 24 V DC sensors is referenced correctly to the module's power contact to prevent potential difference issues, which could lead to erratic signal states or reduced noise immunity.