Beckhoff EL3356-0020 EtherCAT Terminal 1-channel Analog Input

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Manufacturer: BECKHOFF
Product No.: EL3356-0020
Country of origin:Germany
Product Type: EtherCAT Terminals
Payment: T/T, Western Union
Weight: 2000g
Dimensions: 12 mm x 100 mm x 68 mm
Shipping port: Xiamen
Warranty: 12 months

Description

Designed specifically for high-accuracy gravimetric and force monitoring applications, the Beckhoff EL3356-0020 EtherCAT Terminal processes differential signals from full-bridge strain gauges with exceptional speed and precision. This terminal interfaces directly with resistor bridges to deliver reliable, factory-calibrated measurements in industrial process environments.

Key Features

Direct interface for one resistor bridge in full-bridge technology.
High-resolution 24-bit analog-to-digital conversion with 32-bit data presentation options.
Factory calibration certificate stored internally for guaranteed accuracy.
Supports Distributed Clocks (DC) for precise temporal synchronization across the EtherCAT network.
Integrated dynamic filters, quadruple averager, and self-calibration routines.

Industrial Applications

High-precision industrial platform scales and vessel weighing.
Material testing machines and tensile strength evaluation systems.
Silo and hopper level measurements with dynamic load distribution.
Torque and force monitoring on rotating equipment.

Technical Specifications

Parameter	Specification Value
Manufacturer	Beckhoff
Model Number	EL3356-0020
Product Type	EtherCAT Terminal
Number of Inputs	2, for 1 full-bridge resistor bridge
Technology Type	Resistor bridge, strain gauge
Signal Type	Differential
Distributed Clocks	Yes
Measuring Range UD	Max. -25 to +25 mV rated voltage
Measuring Range UREF	Max. -12 to +12 V rated voltage
Internal Resistance	> 200 kOhm (UREF), > 1 MOhm (UD)
Input Filter Limit	10 kHz low pass (-3 dB)
Conversion Time	0.1 to 250 ms (configurable)
Resolution	24 bit (32 bit presentation)
Measurement Error	< +/-0.01 % of calculated load value
E-bus Current Draw	Typ. 280 mA
Calibration Type	Factory calibrated (with certificate)
Operating Temperature	0 to +55 degC
Dimensions (W x H x D)	12 mm x 100 mm x 68 mm
Connection Technology	Spring-actuated cage clamp
Wire Cross Section	Solid/Stranded: 0.08 - 2.5 mm2 (AWG 28 - 14)
Shipping Weight	2.0 kg

Alternative Models & Compatibility

Comparing the EL3356-0020 to standard EL3356 terminals, the primary differentiator is the included factory calibration certificate stored directly within the terminal's internal non-volatile memory. To maintain compatibility with TwinCAT projects, ensure the corresponding EtherCAT XML Device Description (ESI) file matches this precise hardware revision to prevent E-bus initialization failures.

Application Pitfalls & Engineering Notes

When deploying inside high-density control panels, thermal fluctuations can degrade calibration accuracy. While the active self-calibration routine corrects for gain and offset drift, mounting the terminal away from high-heat components like variable frequency drives is recommended. Additionally, aggressive setting of dynamic filters (CoE 0x8000) may introduce signal delays that can affect high-speed check-weighing applications.

Commissioning & Wiring Tips

Shielding is critical when dealing with microvolt-level differential signals (UD). Run strain gauge cabling through dedicated conduits and terminate the overall shield directly to the grounded DIN rail via low-impedance grounding clamps. Ensure CoE parameters (such as the notch filter for 50 Hz/60 Hz noise rejection) are aligned with your localized grid frequency to maximize signal stability.

Installation Guidelines

CRITICAL WARNING: ELECTRICAL HAZARD

Ensure the main power supply and E-bus system are entirely de-energized before mounting, wiring, or removing this terminal. Failure to do so can result in electrical shock, transient surges on the bus, or permanent damage to the high-precision differential circuit of the measuring module.

1 Position the terminal on the standard 35 mm DIN rail (conforming to EN 60715) and slide it until the locking clip securely snaps into place.

2 Ensure reliable grounding of the DIN rail to establish a noise-free return path for the high-precision analog signals.

3 Strip wires to the recommended length of 8 to 9 mm. Insert a flathead screwdriver into the spring actuation slot to open the cage clamp, insert the wire, and release the screwdriver.

4 Configure the TwinCAT System Manager to recognize the new device, and verify calibration parameter integration via CoE online indices.

Model Number / Title	Condition	Availability	Action
BECKHOFF EJ2889 EtherCAT Plug-in Module 16-Channel Digital Output	Original New	In Stock	View Details
EL4032 BECKHOFF 2-Channel Analog Output EtherCAT Terminal ±10 V	Original New	In Stock	View Details
EL2878-0005 BECKHOFF 8-Channel Digital Output Terminal Ribbon Cable Connection	Original New	In Stock	View Details

Key Features:

What is the primary difference between the EL3356-0020 and standard EL3356 terminals?

The EL3356-0020 variant features factory calibration directly stored in the terminal's internal EEPROM, providing a certified measurement error of less than 0.01 percent under nominal conditions.

Does the EL3356-0020 support Distributed Clocks (DC)?

Yes, this EtherCAT terminal supports Distributed Clocks, enabling synchronized, high-precision signal acquisition across multi-axis or distributed measurement systems.

How should shield grounding be handled to minimize noise in microvolt readings?

Connect the strain gauge cable shield directly to the terminal's designated shield contacts, ensuring a low-impedance connection to the DIN rail's earth ground to prevent electromagnetic interference from distorting the differential signal.

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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Beckhoff EL3356-0020 EtherCAT Terminal 1-channel Analog Input