Beckhoff EL1859 EtherCAT Terminal

Product Overview

The EL1859 (EL1859) is a high-density (HD) EtherCAT terminal that integrates 8 digital inputs and 8 digital outputs into a single, space-saving 12 mm wide module. Designed for versatile industrial applications, this "combi" terminal supports 24 V DC signals and is optimized for efficient signal processing in compact control cabinets. By providing a high channel density, the EL1859 minimizes the footprint of I/O assemblies while maintaining the deterministic, high-speed communication performance of the EtherCAT network. It is ideal for machine control systems requiring a balance of monitoring and actuation capabilities, including sensor feedback collection and small actuator control for conveyors, packaging, and assembly lines.

Technical Configuration

The EL1859 features a 1-wire connection technology, significantly reducing the amount of field wiring required. The input stages comply with EN 61131-2 (type 1/3), ensuring robust compatibility with a wide range of standard sensors. The output channels are capable of driving ohmic, inductive, and lamp loads with a maximum current of 0.5 A per channel, complemented by integrated reverse voltage protection to safeguard the hardware against wiring errors or transient back-EMF from inductive loads. The module utilizes a high-density (HD) polycarbonate housing, supporting side-by-side mounting via a double slot and key connection, which ensures mechanical stability on standard 35 mm DIN rails.

Technical Specifications

FAQs

How does the HD (High Density) housing differ from standard terminals?

The HD housing allows for a higher number of I/O points within the same 12 mm width by optimizing the terminal layout and connection density, perfect for applications where control cabinet space is limited.

Is it necessary to set an address for the EL1859 during installation?

No. Like all standard Beckhoff EtherCAT terminals, the EL1859 is auto-configured by the EtherCAT master; there are no manual address or configuration switches required.

Can I drive inductive loads directly with the output channels?

Yes, the outputs are designed to handle inductive loads. However, ensure that the energy stored in the inductive load does not exceed the specified breaking energy of < 150 mJ per channel to prevent damage to the output switching transistors.

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

The 1-wire connection reduces cabling complexity by consolidating the signal path, which is particularly beneficial for high-density I/O configurations, leading to faster installation times and reduced cabinet wiring clutter.

Installation Guidelines and Best Practices

• Wiring Technique: For solid conductors, you can utilize the direct plug-in technique. For fine-stranded conductors or wires with ferrules, use a small screwdriver to actuate the spring terminals to ensure a reliable, gas-tight connection.

• Thermal Management: While the terminal is compact, maintain proper airflow within the cabinet. In dense I/O assemblies where all channels are fully loaded, ensure the ambient temperature does not exceed 55 deg C to maintain the specified lifespan of the electronic components.

• EMC Considerations: Although the terminal complies with EN 61000-6-2/6-4, always route digital I/O signal cables away from high-power motor drive cables or high-voltage AC lines to prevent induced noise from causing false signal triggers or output jitter.