EL1859 Beckhoff
Wake Industrial LLC is not an authorized distributor of this product.
MPN: EL1859-0000
The Beckhoff EL1859 is part of the EL EtherCAT Terminals series and features 8 inputs and 8 outputs with 24 VDC nominal input voltage. This terminal offers 1-Wire connection technology, input filtering of 3 ms, and includes both short-circuit and reverse voltage protection. It mounts on a 35 mm rail and is rated to the IP20 protection class.
Internal Product Review
The EL1859 is a Beckhoff EtherCAT terminal with 8 inputs and 8 outputs for efficient distributed I/O handling. A 24 VDC nominal input and short-circuit protection support dependable integration in standard automation panels. Switching times of 60 µs TON and 300 µs TOFF make the EL1859 especially well suited for responsive signal processing.
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Product Description:
The EL1859 is a digital combination terminal produced by Beckhoff for the EL EtherCAT Terminals series. Designed for distributed control systems, the device integrates eight input channels and eight output channels into a single slice, allowing field wiring to be concentrated on the bus rail. By providing both signal directions in one housing, the terminal reduces node count, conserves panel space, and delivers deterministic updates through EtherCAT. Its compact format supports connections between on-machine sensors, actuators, and the PLC.
Signal connections use the 1-Wire concept, which lets each channel share a common supply reference while minimizing conductor count. All inputs are referenced to a nominal 24 VDC sensor supply, and an internal 3 ms filter suppresses contact bounce before data are forwarded to the controller. The local E-bus typically draws only 130 mA, so the terminal imposes a modest load on the backplane power feed. Each output can source up to 0.5 A, enabling direct actuation of small relays or indicator lamps without an external driver. The housing locks onto a 35 mm DIN mounting rail, aligning the spring terminals with adjacent Beckhoff I/O terminals. The process image is organized as eight input bits and eight output bits for predictable mapping within TwinCAT.
The input sensing circuits draw only 3 mA per channel, while the power contacts require 15 mA plus the switched load, keeping total cabinet power consumption low. The terminal carries an IP20 protection rating, so it is intended for installation within an enclosure but does not require separate terminal covers. Reverse-voltage protection is provided on the supply pins, and built-in short-circuit detection disconnects an output if an overload occurs. Typical switching times of TON 60 µs and TOFF 300 µs support rapid control sequences without introducing excessive timing delays. These response times make the terminal suitable for operating devices such as compact solenoids and indicator circuits. The integrated protective functions also help prevent electrical faults on individual outputs from disrupting the remaining connected channels.
