Product Description:

The EL1259 is an EtherCAT I/O terminal manufactured by Beckhoff for the EL EtherCAT Terminals series. It combines high-density signal handling, with eight inputs and eight outputs, in a 12 mm-wide terminal that links field wiring directly to the real-time EtherCAT bus. By translating conventional 24 V control lines into deterministic process data, the unit streamlines decentralized machine panels and supports modular automation architectures.

The input side accepts 8 digital inputs that are sampled through a 1-wire interface, while the output stage provides 8 digital outputs driven by internal push transistors. All channels operate from a field supply of 24 VDC, so standard control voltage can be routed through the terminal without level shifters. Wiring is simplified by the 1-wire connection technology, which reduces the need for terminal blocks and keeps enclosure layouts compact. Each output channel can source up to 0.5 A, permitting direct actuation of relays, indicator lamps, or small solenoids without interposing relays. Distributed-clock functionality allows the module to align its internal timers with the EtherCAT master for synchronous signal generation and capture.

Timing precision reaches a channel resolution of 1 ns, enabling accurate edge stamping for high-speed assembly or inspection stations. For burst activity, every channel stores up to 32 buffer events, so fast pulse trains are transferred to the controller without loss. Cabinet footprint is minimized by an overall width of 12 mm, and the terminal mounts on a 35 mm DIN rail alongside other Beckhoff terminals. The enclosure meets the IP20 protection class, making it suitable for ventilated control cabinets. Typical power draw from the E-bus is 130 mA, and each input draws only 3 mA at 24 V, keeping backplane and sensor loading low while the push output stage maintains deterministic switching.