EL3122 | Beckhoff EtherCAT Terminal 2-Channel Analog Input 4–20 mA 16-Bit Differential

Beckhoff · Cables & Connectivity

Description  The Beckhoff EL3122 is a 2-channel analog input EtherCAT Terminal designed for precise current measurement in the 4–20 mA range. Featuring 16-bit resolution, differential inputs, and 500 V electrical isolation, it ensures accurate signal acquisition and reliable data transmission in industrial automation systems.     Technical Specifications  Condition New/Never Used Surplus Brand Beckhoff Category Industrial Automation Part Number EL3122 Subcategory EtherCAT Terminal Function 2-channel analog input for current measurement Number of Inputs 2 (differential) Signal Current 4–20 mA Resolution 16 bit (including sign) Conversion Time ~50 µs (fast mode ~35 µs) Internal Resistance Typ. 85 Ω + diode voltage Input Filter Limit Frequency 5 kHz Common Mode Voltage (UCM) Max. 10 V Measurement Error < ±0.3% (relative to full-scale value) Surge Voltage Resistance Max. 35 V Electrical Isolation 500 V (E-bus/signal voltage) Distributed Clocks Yes Power Supply Via the E-bus Current Consumption (E-bus) Typ. 170 mA Bit Width in Process Image Inputs: 8 bytes Special Features FIR/IIR filters, limit value monitoring, standard and compact process image Protection Class IP20 Operating Temperature -25°C to +60°C Storage Temperature -40°C to +85°C Relative Humidity 95%, non-condensing Weight Approx. 55 g   Information About EL3122 The EL3122 belongs to Beckhoff’s EL3xxx EtherCAT Terminal series and is engineered for accurate current signal measurement from analog sensors and transmitters. It supports two differential inputs in the 4–20 mA range, digitizing the measured signals at a resolution of 16 bits for precise and stable data acquisition. Integrated electrical isolation between the E-bus and signal voltage enhances system reliability and prevents interference. The EL3122 supports distributed clock functionality for synchronous data collection across multiple channels, ensuring deterministic system performance. Its high input filter frequency of 5 kHz and fast conversion time of 50 µs allow accurate signal capture even in dynamic processes. Additional features such as activatable FIR/IIR filters and limit value monitoring make it suitable for complex automation applications requiring both performance and diagnostic flexibility. Key Features: Dual Differential Channels: Two isolated analog inputs for measuring 4–20 mA current signals from sensors, transducers, and process devices. High Measurement Accuracy: 16-bit resolution and ±0.3% error tolerance ensure precise signal acquisition for critical applications. Electrical Isolation: 500 V isolation between field and bus systems guarantees safe and interference-free operation. Fast Signal Processing: Conversion time of 50 µs (35 µs in fast mode) supports rapid and dynamic process monitoring. Wide Input Compatibility: Handles standard 4–20 mA current loops, compatible with industrial transmitters and actuators. Integrated Filtering and Monitoring: Configurable FIR/IIR filters and limit value alarms improve signal quality and fault detection. Distributed Clock Synchronization: Enables deterministic data sampling across multiple terminals for coordinated process control. Rugged Industrial Design: Operates from -25°C to +60°C with 95% humidity resistance, suitable for harsh environments. Compact Modular Integration: Fits seamlessly into EtherCAT networks for flexible, scalable, and space-efficient automation layouts. Surge Protection and Overvoltage Resistance: Withstands up to 35 V input surge to ensure long-term reliability in noisy systems. The EL3122 delivers the reliability and precision required for process automation, current monitoring, and signal conditioning in EtherCAT-based industrial control systems.

Brand: Beckhoff · Category: Cables & Connectivity

Key features

• Dual Differential Channels: Two isolated analog inputs for measuring 4–20 mA current signals from sensors, transducers, and process devices.
• High Measurement Accuracy: 16-bit resolution and ±0.3% error tolerance ensure precise signal acquisition for critical applications.
• Electrical Isolation: 500 V isolation between field and bus systems guarantees safe and interference-free operation.
• Fast Signal Processing: Conversion time of 50 µs (35 µs in fast mode) supports rapid and dynamic process monitoring.
• Wide Input Compatibility: Handles standard 4–20 mA current loops, compatible with industrial transmitters and actuators.
• Integrated Filtering and Monitoring: Configurable FIR/IIR filters and limit value alarms improve signal quality and fault detection.
• Distributed Clock Synchronization: Enables deterministic data sampling across multiple terminals for coordinated process control.
• Rugged Industrial Design: Operates from -25°C to +60°C with 95% humidity resistance, suitable for harsh environments.
• Compact Modular Integration: Fits seamlessly into EtherCAT networks for flexible, scalable, and space-efficient automation layouts.
• Surge Protection and Overvoltage Resistance: Withstands up to 35 V input surge to ensure long-term reliability in noisy systems.

Specifications

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