EL1808 Beckhoff
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MPN: EL1808-0000
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The Beckhoff EL1808 is part of the EL EtherCAT Terminals series and features 8 inputs with 16 connection points using 2-wire technology. This terminal operates with a nominal input voltage of 24 VDC, supports a 3 ms input filter, and is designed for mounting on a 35 mm rail. The part has an IP20 protection class and a terminal width of 12 mm.
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Product Description:
Beckhoff produces the EL1808 digital input terminal within the EL EtherCAT Terminals series. The unit installs on a common supply rail and provides eight discrete channels that feed field signals directly into an EtherCAT network. In automated machinery, the terminal captures sensor states, limit switch signals, and contact closures so that a programmable controller can respond to real-time process events at high update rates. By integrating compact slice I/O with deterministic bus communication, it helps reduce cabinet wiring and improve diagnostic coverage across distributed installations.
Each channel accepts a nominal input level of 24 VDC and supports two-wire connection technology, allowing compact wiring for compatible field devices. The terminal provides 8 individually time-stamped inputs through a front connector that internally links to 16 spring-loaded connection points, facilitating the adjacent feed-through of power contacts. Internal logic draws only 100 mA from the E-bus, while each field circuit requires only 3 mA, keeping overall power dissipation low inside densely populated racks. A hardware filter with a response time of 3 ms suppresses contact bounce, so the controller receives clean signal transitions even from mechanical sensors. The terminal mounts on a 35 mm DIN rail, supporting installation alongside other compatible EtherCAT terminals. The common reference ground is the 0 V power contact that runs along the terminal row.
Cabinet space is conserved because the housing measures only 12 mm across, while its IP20 protection level makes it suitable for closed electrical enclosures. The input characteristics comply with the EN 61131-2 Type 1/3 standard, which establishes switching thresholds and supports interoperability with typical PLC input circuits. In the EtherCAT process image, the terminal contributes eight input bits, matching the physical channels and enabling deterministic mapping without padding. Each channel’s status is shown by a green LED located directly above its screwless clamp, allowing signal presence to be checked without additional tools.
