EL3124 Beckhoff
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MPN: EL3124-0000
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The Beckhoff EL3124 is an analog input terminal from the EL EtherCAT Terminals series. It features 4 differential analog inputs, a 16-bit resolution, and an input filter of 5 kHz. The unit is designed for 35 mm rail mounting, uses a supply voltage via E-bus, and has IP20 protection.
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Product Description:
The EL3124 is a four-channel analog input terminal manufactured by Beckhoff and supplied under the EL EtherCAT Terminals series. Installed on a standard DIN rail beside other EtherCAT nodes, this module converts external sensor voltages into digitized data for a controller, enabling precise acquisition of process variables in distributed automation lines. Because the channels are wired differentially, the module can reject ground offsets that are common in industrial environments and feed clean measurements into the real-time fieldbus.
The module provides 4 analog inputs that are sampled through a multiplexing technique, allowing every channel to share the same high-quality converter. Signal conversion occurs with a 16-bit resolution, providing 65,536 discrete steps across the measurement span. A 5 kHz input filter attenuates higher-frequency noise before the converter, while the allowable 10 V common-mode voltage maintains measurement integrity when sensor references drift within that range. During operation, the electronics draw a maximum input current of 40 mA from the EtherCAT backplane. Distributed-clock support allows sample timing to be aligned with submicrosecond precision across larger I/O stations.
Channel protection accommodates a maximum fault voltage of 30 V, guarding the front end against accidental overvoltage during wiring. The housing carries an IP20 rating and clips onto a 35 mm mounting rail, allowing placement inside compact control enclosures that already provide power and communication through the E-bus. Once installed, each conversion appears to the controller through 4 × 16-bit process-image inputs, while separate 8-bit status words report diagnostic flags for each channel. Supply power is drawn exclusively through the E-bus, eliminating extra field wiring and keeping the footprint small for densely packed measurement panels. The module’s differential input arrangement is suitable for sensors whose reference potentials may vary within the permitted common-mode range.
