BECKHOFF EL3351 EtherCAT Terminal

Q: What is the primary function of the BECKHOFF EL3351?

The BECKHOFF EL3351 is a 1-channel analog input EtherCAT Terminal designed for evaluating resistive full bridge sensors such as strain gauges in industrial measurement applications.

Q: How is the BECKHOFF EL3351 powered during operation?

The BECKHOFF EL3351 receives its internal power supply via the E-bus without requiring an external logic power connection.

Q: Does the BECKHOFF EL3351 provide excitation voltage for sensors?

Yes, the BECKHOFF EL3351 features an integrated 5 V DC bridge supply capable of delivering up to 20 mA to power connected measuring bridge sensors directly.

Q: What is the resolution and conversion performance of the BECKHOFF EL3351?

The BECKHOFF EL3351 provides a 16-bit resolution with 32-bit process value presentation, and a configurable conversion time supporting up to 400 samples per second.

Q: How does the BECKHOFF EL3351 mount into an automation system?

The BECKHOFF EL3351 mounts onto a standard 35 mm DIN rail conforming to EN 60715 and connects to adjacent modules using a side-by-side double slot and key connection.

SKU EL3351

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12-month warranty
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Manufacturer: BECKHOFF
Product No.: EL3351
Country of origin:Germany
Product Type: EtherCAT Terminals
Payment: T/T, Western Union
Weight: 60g
Dimensions: 12 mm x 100 mm x 68 mm
Shipping port: Xiamen
Warranty: 12 months

Description

The BECKHOFF EL3351 is an EtherCAT Terminal featuring a single-channel analog input specifically designed for measuring bridge evaluation. Operating within the modular EtherCAT I/O system, this device enables direct connection of a resistive full bridge sensor, such as a strain gauge, allowing precise acquisition of load, force, or weight measurements in industrial automation environments.

Signal processing is handled with high resolution, and the integrated 5 V DC bridge supply powers the connected sensor directly through the terminal. The compact housing mounts easily onto a standard 35 mm DIN rail and communicates high-speed measurement data over the EtherCAT network with minimal latency.

Features

1-channel analog input terminal for resistance bridges in full bridge technology
Integrated 5 V DC bridge supply for strain gauge sensors
Differential signal input with high internal resistance
Parameterizable input filter limit frequency with a 50 Hz default setting
Configurable conversion time supporting up to 400 samples per second
16-bit resolution with 32-bit process value presentation
Powered via the internal E-bus without requiring additional field supply terminals for logic

Applications

Industrial weighing systems and platform scales
Force monitoring and load cell measurement in assembly machines
Strain and stress analysis on moving or static mechanical structures
Test benches and laboratory measurement setups requiring high-precision bridge evaluation

Technical Specifications

General

Parameter	Specification
Manufacturer	BECKHOFF
Exact Model	EL3351
Product Type	EtherCAT Terminal
Number of Inputs	1 (for 1 resistor bridge in full bridge technology)
Technology	Resistor bridge, strain gauge
Signal Type	Differential

Electrical Characteristics

Parameter	Specification
Measuring Range UD	Max. -20 to +20 mV
Measuring Range UREF	Max. -12 to +12 V
Internal Resistance	> 200 kΩ (UREF), > 1 MΩ (UD)
Power Supply UV	5 V DC, max. 20 mA (integrated bridge supply)
Power Supply	Via the E-bus
Current Consumption E-Bus	Typ. 170 mA
Current Load Power Contacts	Imax: 10 A

Performance and Processing

Parameter	Specification
Resolution	16 bit, 32 bit presentation
Input Filter Limit Frequency	50 Hz default setting, parameterizable
Conversion Time	2.5 to 800 ms, configurable, max. 400 samples/s
Measuring Error	< ±0.1 % (relative to full scale value, 50 Hz filter)
Supported Nominal Sensitivity	Calculated in PLC, freely selectable

Connection System

Parameter	Specification
Connection Technology	Spring actuation by screwdriver
Connection Cross-Section Solid	0.08 to 2.5 mm² (AWG 28 to 14)
Connection Cross-Section Stranded	0.08 to 2.5 mm² (AWG 28 to 14)
Connection Cross-Section with Ferrule	0.14 to 1.5 mm² (AWG 26 to 16)
Stripping Length	8 to 9 mm

Mechanical and Environmental

Parameter	Specification
Dimensions (W x H x D)	12 mm x 100 mm x 68 mm
Net Weight	Approx. 60 g
Mounting	On 35 mm DIN rail conforming to EN 60715
Protection Rating	IP 20
Operating Temperature	0 to +55 degC
Storage Temperature	-25 to +85 degC
Relative Humidity	95 %, no condensation
Vibration / Shock Resistance	Conforms to EN 60068-2-6 / EN 60068-2-27
EMC Immunity / Emission	Conforms to EN 61000-6-2 / EN 61000-6-4

Installation Guidelines

Ensure all system power and field supplies are switched off and locked out before performing any mechanical or electrical work.
Inspect the BECKHOFF EL3351 terminal for any visible transport damage or bent pins.
Mount the terminal onto a standard 35 mm DIN rail by snapping it into place using the locking mechanism. Ensure proper side-by-side alignment with adjacent EtherCAT terminals or couplers via the slot and key connection.
Connect the strain gauge full bridge sensor wiring to the appropriate terminal points using a suitable screwdriver for spring actuation, ensuring correct assignment of excitation and signal lines.
Verify that the E-bus connection engages correctly with neighboring terminals to maintain power and data continuity across the bus coupler system.
Restore system power and configure the terminal parameters within the TwinCAT engineering environment prior to operational use.

FAQ

What is the primary function of the BECKHOFF EL3351?

The BECKHOFF EL3351 is a 1-channel analog input EtherCAT Terminal designed for evaluating resistive full bridge sensors such as strain gauges in industrial measurement applications.

How is the BECKHOFF EL3351 powered during operation?

The BECKHOFF EL3351 receives its internal power supply via the E-bus without requiring an external logic power connection.

Does the BECKHOFF EL3351 provide excitation voltage for sensors?

Yes, the BECKHOFF EL3351 features an integrated 5 V DC bridge supply capable of delivering up to 20 mA to power connected measuring bridge sensors directly.

What is the resolution and conversion performance of the BECKHOFF EL3351?

The BECKHOFF EL3351 provides a 16-bit resolution with 32-bit process value presentation, and a configurable conversion time supporting up to 400 samples per second.

How does the BECKHOFF EL3351 mount into an automation system?

The BECKHOFF EL3351 mounts onto a standard 35 mm DIN rail conforming to EN 60715 and connects to adjacent modules using a side-by-side double slot and key connection.

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30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

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Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

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