EL3174 Beckhoff EtherCAT Terminal | 4-Ch Analog Input 16-Bit

EL3174 | EtherCAT Terminal, 4-Channel Analog Input

Beckhoff – EL3174 is a high-density analog input terminal for industrial automation. It processes voltage and current signals with 16-bit resolution. The device supports individually parameterizable channels via TwinCAT. It is ideal for precision measurement in control systems.

Key Features

• 4 individually configurable inputs – voltage (±10 V) or current (±20 mA)
• 16-bit resolution including sign, accurate to ±0.3 %
• Technical measuring range – ±107 % of nominal range (NAMUR NE43)
• Distributed clocks with precision < 1 µs
• Electrical isolation – 500 V (E-bus / signal)
• Compact HD design – 12 mm width, DIN rail mount

Technical Specifications

• Brand: Beckhoff
• Model: EL3174
• Series: EtherCAT Terminal
• Module Type: 4-channel multifunction analog input
• Power Supply: via E-bus (typ. 200 mA)
• Input Type: Voltage differential / Current single-ended
• Internal Resistance: >200 kΩ (voltage) / typ. 85 Ω (current)
• Input Filter Limit Frequency: 5 kHz
• Common-mode Voltage: max. 35 V (voltage measurement)
• Dielectric Strength: max. 30 V (current measurement)
• Conversion Time: min. 150 µs
• Nominal Measuring Range: -10/0…+10 V | -20/0/+4…+20 mA
• Technical Measuring Range: -10.73…+10.73 V | -21.47…+21.47 mA
• Resolution: 16 bit (incl. sign)
• Measuring Error: < ±0.3 % (relative to full scale)
• Temperature Range (operation): -25…+60 °C
• Storage Temperature: -40…+85 °C
• Relative Humidity: 95 % (non-condensing)
• Vibration / Shock: EN 60068-2-6 / EN 60068-2-27
• EMC Immunity / Emission: EN 61000-6-2 / EN 61000-6-4
• Protection Rating: IP20
• Installation Position: variable

Installation & Compatibility

• Mounting: 35 mm DIN rail (EN 60715) with locking mechanism
• Wiring: spring actuation by screwdriver; solid wire (0.08…1.5 mm²), stranded (0.25…1.5 mm²), ferrule (0.14…0.75 mm²)
• Stripping length: 8…9 mm
• Side by side mounting: double slot and key connection
• Compatibility: TwinCAT, CoE (CANopen over EtherCAT), any EtherCAT master
• Process image: 16 bytes input, no address or configuration setting

Certifications & Approvals

• CE, UL, ATEX, IECEx, cFMus
• cFMus: Class I, Division 2, Groups A, B, C, D / Class I, Zone 2, AEx ec IIC T4 Gc

Package Contents & Warranty

• EL3174 terminal (1 piece)
• Documentation leaflet
• Warranty: 12 months against manufacturing defects
• Shipping: 12–24 hour dispatch via FedEx, UPS, or DHL

Expert Review

The EL3174 stands out for its flexible U/I configuration and extended range. Its distributed clock precision ensures synchronous data acquisition. The HD housing saves panel space. For critical applications, the NAMUR NE43 diagnostics simplify commissioning. A robust choice for mixed-signal environments.

Manager’s Insight

This terminal reduces inventory complexity. One module handles both voltage and current. The 16-bit resolution and 5 kHz filtering deliver reliable data. With ATEX and cFMus approval, it fits global installations. The 12-24h shipping from stock supports urgent projects.

Typical Applications

• Process automation (flow, pressure, level)
• Machine building (position, speed monitoring)
• Test benches and data acquisition
• Energy management and IoT gateways
• Any EtherCAT-based control system

FAQ – Frequently Asked Questions

• Can I mix voltage and current on different channels?
  Yes. Each of the 4 channels is individually parameterizable via CoE.
• What is the minimum conversion time?
  150 µs per channel. This enables fast control loops.
• Is the EL3174 suitable for 4-20 mA sensors?
  Absolutely. It supports 0/4…20 mA with extended range up to 21.47 mA.
• Does it support distributed clocks?
  Yes, with precision < 1 µs. Ideal for synchronous applications.
• What is the maximum common-mode voltage?
  35 V for voltage measurement. Ensure proper isolation.

Experience-based Tips

• Use shielded cables for current inputs to reduce noise.
• Set the filter frequency in TwinCAT to match your signal dynamics.
• For NAMUR NE43, enable the extended range to detect sensor faults.
• Always connect the voltage inputs differentially for best accuracy.

Selection Guide

• Choose EL3174 if you need 4 mixed-signal inputs in a small footprint.
• For pure voltage or current, consider EL3104 or EL3124, but EL3174 offers more flexibility.
• If you require higher channel count, cascade multiple EL3174 terminals.
• For hazardous areas, the cFMus approval makes it a safe choice.

For inquiries, contact our sales team:
sales@powergearx.com |
+86 18030005825 (WhatsApp)

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