EL3042 Beckhoff
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MPN: EL3042-0000
The Beckhoff EL3042 is part of the EL EtherCAT Terminals series and features two analog inputs with 12-bit resolution and a conversion time of 0.625 ms. It supports an input filter cutoff of 1 kHz, has an internal resistance of 85 Ohms, and uses single-ended ground reference. The terminal operates with an E-bus current of 130 mA and offers IP20 protection rating.
Internal Product Review
The EL3042 is a Beckhoff EtherCAT analog input terminal with 2 analog inputs and 12-bit resolution. Multiplex sampling and a 0.625 ms conversion time support stable signal acquisition in fast control tasks. IP20 protection and electronics supplied via E-bus make this terminal a strong choice for efficient cabinet-level I/O integration.
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Product Description:
The EL3042 is a two-channel analog input terminal manufactured by Beckhoff for the EL EtherCAT Terminals series. Mounted on a DIN rail beside other I/O modules, it converts low-level process currents into digital words that a controller can interpret for closed-loop automation tasks. The terminal draws its logic power from the system E-bus, allowing it to operate in a distributed EtherCAT node without a separate logic-power wiring harness. Its compact format supports current acquisition from sensors and transducers installed throughout an automated machine or process.
The module has 2 input channels, each of which is scanned through a multiplexed front end with 12 bits of resolution. The system produces one updated sample every 0.625 ms, providing regular measurements for the controller’s process image. A first-order hardware filter attenuates frequencies above 1 kHz, limiting aliasing before each measured value reaches the converter. The internal 85 Ω input impedance stabilizes the source circuit, while the conversion result occupies 2 bytes of status data and 2 bytes of value data for each channel. During operation, the electronics draw 130 mA from the E-bus. Because distributed clock support is not included, the standard EtherCAT task scheduler controls the terminal’s timing.
Field wiring uses a single-ended ground reference for both analog channels. A rated isolation voltage of 30 V separates the channels from neighboring potentials and provides basic separation inside a protected control cabinet. The housing has an IP20 protection rating, guarding internal components against contact with fingers and similarly sized solid objects while leaving the terminal unsuitable for direct exposure to water. Its process data uses a 16-bit presentation width, allowing higher-level software to scale the reported values without reducing the terminal’s measurement resolution. Configuration parameters can be retained because the terminal supports nonvolatile CoE storage. Power for the analog front end is supplied exclusively through the E-bus, reducing the number of external supply connections required at the terminal block.
