EL3051 Beckhoff
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MPN: EL3051-0000
The Beckhoff EL3051 is part of the EL EtherCAT Terminals series and features one analog input with single-ended ground reference. It provides 16-bit data presentation, a resolution of 12 bits, and supports a signal current range from 4 to 20 mA. With an operating temperature range of -25 to 60 degrees Celsius and a protection rating of IP20, it is suitable for various automation applications.
Internal Product Review
The EL3051 is a Beckhoff EtherCAT analog input terminal designed for 4...20 mA signals with 12-bit resolution. Single-ended input architecture and measuring error below ±0.3% support accurate, consistent signal acquisition in industrial control systems. IP20 protection makes the module a dependable choice for clean cabinet installations.
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Product Description:
The EL3051 analog input EtherCAT terminal is manufactured by Beckhoff as part of the EL EtherCAT Terminals series. The module accepts industry-standard current-loop signals and converts them into digital values for machine control. Installed on a DIN rail bus, it reduces wiring and enables precise sensor acquisition in distributed industrial automation equipment. Its compact terminal format allows the input channel to be placed near field sensors, reducing the length of analog signal wiring within a control system.
The module supports one single-ended analog input with a ground reference. The input current range is 4 to 20 mA, and the internal analog-to-digital converter provides a base resolution of 12 bits. Automatic scaling and sign extension provide the controller with an expanded 16-bit value. Conversion occurs simultaneously with the bus update, preventing timing differences between signal acquisition and data transmission. An internal low-pass filter set to 1 kHz attenuates high-frequency noise before sampling. Under typical conditions, the total measurement error remains within less than ±0.3% of full scale, minimizing the need for software correction. The terminal transmits a fixed process image containing 2 bytes of status data and 2 bytes of measured data, which conserves bandwidth on large networks.
Internal isolation tolerates a test potential of up to 30 V between the I/O and supply lines. The housing has an IP20 protection rating for installation in a suitable control cabinet. Reliable measurement is supported across an operating temperature range of -25 to +60 °C. The components can withstand a storage temperature range of -40 to +85 °C while the terminal is not operating. Distributed Clocks are not supported, so applications that require absolute timing must obtain it from the master controller. The grounding arrangement simplifies loop troubleshooting, but connected sensors must use a common return path. Internal filtering helps suppress electrical noise before conversion, while synchronized data handling keeps the measured value aligned with EtherCAT updates.
