Product Description:

The EL4038 is an analog output terminal developed by Beckhoff within the EL EtherCAT Terminals series. As an eight-channel voltage interface, the unit converts digital process data from the bus into proportional field signals for actuators, drives, and control valves in industrial automation. It attaches directly to an EtherCAT I/O stack, allowing analog output capacity to be expanded without separate wiring blocks or auxiliary controllers.

The channel electronics are supplied through the E-bus, so only the field side requires a 24 VDC feed to energize the outputs. The module provides 8 analog channels that occupy eight 16-bit words in the PLC process image, simplifying deterministic access. With a converter precision of 12 bits, each channel can issue 4,096 distinct voltage steps to meet typical resolution requirements for drives and proportional valves. Output updating follows a multiplex sequence that scans one channel after another. This method minimizes crosstalk, maintains consistent settling times, and keeps the total refresh time within the requirements of most motion or temperature control loops. A common ground reference further supports stable output signals.

For enclosure integration, the housing snaps onto a 35 mm DIN rail and carries a protection rating of IP20, making it suitable for cabinets that limit dust exposure and accidental contact. The outputs are short-circuit-proof, protecting the terminal if an output wiring fault occurs. Synchronization is available through Distributed Clocks, allowing the terminal to align its update cycle with submicrosecond accuracy across the network. This synchronized operation supports applications that require coordinated output timing across multiple EtherCAT devices. A variable installation position and single-ended wiring scheme reduce layout constraints in the control cabinet. The common output ground simplifies field wiring, while the 8 × 16-bit process image width eliminates manual bit packing in the controller program.