EL4004 Beckhoff
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MPN: EL4004-0000
The Beckhoff EL4004 is part of the EL EtherCAT Terminals series and features 4 analog outputs with a resolution of 12 bits. This terminal offers a signal voltage range of 0 to 10 volts and an E-bus current of typically 140 mA. It operates with a 24 VDC power supply via power contacts and carries a protection class of IP20.
Internal Product Review
The Beckhoff EL4004 is an analog output EtherCAT terminal with 4 outputs and a 0..10 V signal range. Single-ended grounding and 12-bit resolution support clean integration and dependable output control in machine-level applications. Measuring error below ±0.1% makes this terminal a strong choice where analog accuracy matters.
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Product Description:
The EL4004 is a four-channel analog output terminal manufactured by Beckhoff for the EL EtherCAT Terminals series. When inserted into a DIN-rail coupler, this module provides standardized voltage signals to drives, proportional valves, or instrumentation that must be controlled by the PLC. It operates as part of an EtherCAT segment, translating cyclic process data into physical voltages so continuous control loops can be closed within distributed automation equipment.
It drives each channel from 0 to 10 V with a conversion depth of 12-bit, providing 4,096 discrete steps across the range. The terminal offers four analog outputs that are updated sequentially by a multiplexed sampling scheme, and each channel uses a single-ended ground to simplify field wiring. Under rated conditions, the total linearity and gain deviation remains within ±0.1% when the connected load is greater than 5 kΩ. Data from the controller arrives through the E-bus as a 4 × 16-bit process image, while the power contacts draw a typical current of 40 mA to drive the output stage. The front casing has an IP20 classification, which limits installation to protected enclosures and prevents direct exposure to dust or moisture. This enclosure format also permits the terminal to be mounted alongside other EtherCAT modules within a compact control cabinet.
The module receives 24 VDC through the power contacts; this rail also supplies the per-channel drive circuits, while the digital logic draws a typical current of 140 mA from the E-bus. The common pin used to ground external sensors can carry up to 500 mA without voltage drift. When an EtherCAT master enables distributed clocks, the terminal aligns its conversions with the network reference while maintaining jitter of less than 100 ns. This timing performance supports closely synchronized motion and process sequences across distributed equipment. The separate field and logic power paths help organize power distribution when the terminal is installed among high-density input and output modules.
