EL3174 Beckhoff EtherCAT Analog Input Terminal 16 Bit ±10 V ±20 mA

EL3174 EtherCAT Terminal, 4-Channel Analog Input, Multi-Function

The Beckhoff EL3174 is a 4-channel analog input terminal for EtherCAT systems. It accepts ±10 V and ±20 mA signals on each channel. Every channel is individually parameterizable through CoE in TwinCAT. Voltage inputs run differentially. Current inputs run single-ended. All inputs digitize at 16-bit resolution. Data moves electrically isolated to the higher-level controller. The technical measuring range reaches ±107 % of the nominal range. This supports commissioning near limit values and NAMUR NE43 diagnostics. The EL3174 suits precise measurement tasks in compact control cabinets.

Technical Data

• Model: EL3174
• Brand: Beckhoff
• Series: EL EtherCAT Terminal
• Module Type: 4-channel analog input, multi-function
• Number of inputs: 4
• Power supply: via the E-bus
• Technology: U differential, I single-ended
• Signal type: differential
• Distributed clocks: yes, precision << 1 µs
• Internal resistance: > 200 kΩ, typ. 85 Ω
• Input filter limit frequency: 5 kHz
• Common-mode voltage UCM: max. 35 V in voltage mode
• Dielectric strength: max. 30 V in current mode
• Conversion time: minimum 150 µs
• Measuring range, nominal: -10/0…+10 V, -20/0/+4…+20 mA
• Measuring range, technical: -10.73…+10.73 V, -21.47…+21.47 mA
• Resolution: 16 bit incl. sign
• Measuring error: < ±0.3 % of full scale
• Electrical isolation: 500 V between E-bus and signal voltage
• Current consumption E-bus: typ. 200 mA
• Bit width in process image: inputs 16 byte
• Configuration: no address or configuration setting
• Special features: U/I parameterizable, ExtendedRange, standard and compact process image, activatable FIR/IIR filters
• Weight: approx. 65 g
• Operating temperature: -25…+60 °C
• Storage temperature: -40…+85 °C
• Relative humidity: 95 %, no condensation
• Vibration and shock: EN 60068-2-6, EN 60068-2-27
• EMC immunity and emission: EN 61000-6-2, EN 61000-6-4
• Protection rating and installation position: IP20, variable
• Approvals: CE, UL, ATEX, IECEx, cFMus

Ex Marking and Housing Data

• cFMus: Class I, Division 2, Groups A, B, C, D
• cFMus: Class I, Zone 2, AEx ec IIC T4 Gc
• Housing: EL-12-16pin, HD design with signal LEDs
• Material: polycarbonate
• Dimensions: 12 mm x 100 mm x 68 mm
• Installation: 35 mm DIN rail per EN 60715 with lock
• Side by side mounting: double slot and key connection
• Marking: labeling of the BZxxx series

Wiring and Connection

• Solid conductors: direct plug-in technique
• Fine-stranded and ferrule: spring actuation by screwdriver
• Solid cross-section: 0.08…1.5 mm², AWG 28…16
• Stranded cross-section: 0.25…1.5 mm², AWG 22…16
• Ferrule cross-section: 0.14…0.75 mm², AWG 26…19
• Stripping length: 8…9 mm
• Current load power contacts: Imax 10 A

Suitable Equipment and Applications

• EtherCAT I/O systems with TwinCAT control
• Test benches for voltage and current measurement
• Process monitoring in factory automation
• Machinery with NAMUR NE43 diagnostics needs
• Compact control cabinets with HD terminal spacing
• Retrofit projects for obsolete control systems
• ATEX Zone 2 and Class I Division 2 areas

Oiltech Controls’s Insight

• The EL3174 gives four independent channels in one 12 mm slice.
• U and I modes switch per channel through CoE, so one part covers mixed signals.
• Differential voltage inputs reject ground noise on long sensor cables.
• FIR and IIR filters cut noise without external signal conditioning.
• Distributed clocks support precise, synchronized sampling below 1 µs.
• ExtendedRange helps when sensor values sit near the nominal limit.
• This terminal fits engineers who need flexible input setup in tight panels.

Why Buy From Oiltech Controls?

• More than 15 years in industrial automation spare parts
• Shipping support to customers worldwide
• Tested industrial surplus and refurbished options
• 12-month warranty on every order
• Technical verification before shipment
• Support for obsolete control systems

Warranty, Lead Time and Shipping

• All products include a 12-month warranty.
• Orders ship within 24-28 hours after payment.
• We ship by FedEx, UPS, and DHL.
• Tracking is provided for every shipment.
• Packing follows industrial standards.

Professional FAQ

Q: Can I mix voltage and current signals on the same EL3174?

A: Yes. Each channel is set to U or I mode through CoE. Wire voltage and current signals to different terminal points. Then set the mode in TwinCAT before startup.

Q: Does the EL3174 work without distributed clocks?

A: Yes. The terminal runs without distributed clocks. For synchronized sampling, enable distributed clocks in TwinCAT. Precision stays below 1 µs.

Q: How do I handle sensor values above the nominal range?

A: The technical range covers ±107 % of nominal. So values up to ±10.73 V or ±21.47 mA remain valid. This helps during commissioning and limit-range diagnostics.

Q: What should I check before buying this terminal?

A: Confirm your EtherCAT coupler supports the EL series. Check that TwinCAT handles CoE parameterization. Also confirm panel space for the 12 mm HD housing. For Ex areas, verify the Ex marking fits your zone.

Q: How do I pick between the EL3174 and a standard analog terminal?

A: Choose the EL3174 when you need mixed U and I channels, NAMUR NE43 diagnostics, or FIR/IIR filters. Choose a standard terminal when signal types are fixed and filter needs are simple.

Contact us for inquiries: info@oiltechcontrols.com or +86 158 8020 0923.

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