BeckhoffEL1859-0000EtherCAT Terminal Assembly – 8 Digital In + 8 Digital Out, 24 V DC, 0.5 A, 12 mm HD Housing

Product Description

What this part is

Beckhoff EL1859-0000, an EtherCAT I/O terminal that combines eight digital inputs and eight digital outputs in one 12 mm module. Article number: EL1859. Series: EL1xxx digital input. Manufactured in Germany. The record covers a seven-module assembly built around this terminal.

EL1859 electrical data

Channels: 8 inputs + 8 outputs. Nominal voltage: 24 V DC, -15% / +20%. Input specification: EN 61131-2 type 1/3. Signal voltage “0”: -3 to +5 V. Signal voltage “1”: 11 to 30 V. Input current: typically 3 mA. Input filter: typically 3 ms. Maximum output current: 0.5 A per channel. Load types: ohmic, inductive and lamp. Switching times: 60 µs on, 300 µs off. Switch-off energy: under 150 mJ per channel. Electrical isolation: 500 V between E-bus and field potential. E-bus current draw: typically 130 mA. Power-contact draw: typically 15 mA plus load.

What these specs mean in practice

The 3 ms input filter suppresses contact bounce from mechanical switches, so a limit switch or pushbutton reads as one clean transition. Outputs are short-circuit proof and reverse-polarity protected, which is what allows the terminal to drive solenoids and lamps directly. Combining both directions in one 12 mm housing halves the rail space that a separate input and output pair would take.

Connection method and mounting

Connection technology: 1-wire, direct plug-in for solid conductors. Fine-stranded conductors and ferrules are actuated by screwdriver. Conductor cross-section: 0.08 to 1.5 mm² solid, AWG28 to AWG16. Stripping length: 8 to 9 mm. Housing: HD high-density, 16-pin, polycarbonate, with signal LEDs on every channel. Mounting: 35 mm DIN rail to EN 60715 with lock. Dimensions: 12 x 100 x 68 mm. Power-contact current load: 10 A. Weight: approximately 65 g. No address or configuration switches.

Environmental and hazardous-area rating

Operating temperature: -25 to +55 °C. Storage temperature: -40 to +85 °C. Relative humidity: 95% non-condensing. Protection rating: IP20. Approvals: CE, CCC, UL, ATEX, IECEx and cFMus. Ex marking: II 3G Ex ec IIC T4 Gc under ATEX and IECEx; Class I Division 2 Groups A, B, C, D and Class I Zone 2 AEx ec IIC T4 Gc under cFMus.

Quantity and configuration

Seven modules ship together: EL1859 digital combi terminal, EL2809 16-channel digital output terminal, EL3061 single-channel analog input terminal, EL4001 single-channel analog output terminal, EL5152 two-channel incremental encoder interface, EK1122 two-port EtherCAT junction, and EL9011 bus end cap. The EK1122 opens two further EtherCAT branch lines from this segment, and the EL9011 closes the E-bus at the right-hand end of the block.

Interchange guidance

EL1859-0000 is the full order designation; EL1859 is the same terminal. The 12 mm HD form factor and E-bus interface are common to the EL series, so the terminal fits any EtherCAT segment behind an EK1100-class coupler or a Beckhoff embedded PC.