BECKHOFF EL3681 EtherCAT Terminal Analog Input Multimeter Module

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Manufacturer: BECKHOFF
Product No.: EL3681
Country of origin:Germany
Product Type: EtherCAT Terminals
Payment: T/T, Western Union
Weight: 70g
Dimensions: 12 mm x 100 mm x 68 mm
Shipping port: Xiamen
Warranty: 12 months

Description

Engineered for high-precision electrical measurement, the EL3681 EtherCAT Terminal functions as an integrated digital multimeter, enabling direct AC and DC electrical measurements within a standard EtherCAT I/O station. This 1-channel analog input terminal processes signal voltages up to 300 V AC/DC and currents up to 10 A, making it highly suitable for comprehensive power and load monitoring applications.

The module supports both manual and automatic range selection across multiple voltage (300 mV to 300 V) and current (100 mA to 10 A) measurement intervals. Utilizing advanced measurement procedures, the EL3681 performs arithmetic averaging for DC signals and True RMS (root-mean-square) calculations for AC signals. Data is transmitted directly to the controller via a 32-bit process image for high-accuracy analysis.

Features

Automatic Range Selection: Dynamically adjusts measuring ranges for optimal resolution and accuracy.
High-Resolution Digitization: Provides 18-bit resolution plus sign across all voltage and current measurement fields.
Dual Measurement Modes: True RMS calculation for AC signals and arithmetic averaging for DC signals.
Integrated Protection: Equipped with an onboard, replaceable 1.25 A fuse and a designated spare fuse compartment.
Robust Isolation: Electrical isolation of up to 1500 V between the E-bus and the field potential.

Applications

Industrial power and load monitoring systems.
Automated test benches and laboratory testing setups.
Machine tool condition monitoring and diagnostics.
Energy management systems in production facilities.

Technical Specifications

Manufacturer	Beckhoff
Part Number / Model	EL3681
Product Type	EtherCAT Terminal (1-channel analog input, multimeter)
Measurement Channels	1 voltage or 1 current (10 A / 1 A)
Measuring Range (Voltage)	300 mV, 3 V, 30 V, 300 V AC/DC (max. 300 V)
Measuring Range (Current)	100 mA, 1 A, 10 A via high current path (max. 10 A)
Resolution	18 bit + sign in each measurement range
Measuring Error	0.01% DC voltage measurement at 40 degC
Internal Resistance	3 mOhm / 0.2 Ohm / 12.5 MOhm (range-dependent)
Conversion Time	0.5 s preset (1 s during range switching); min. 65 ms
E-bus Current Consumption	150 mA typical
Electrical Isolation	1500 V (E-bus / field potential)
Process Image Width	32 bit data, 16 bit control/status
Enclosure Material	Polycarbonate (compact housing with signal LEDs)
Protection Rating	IP20
Dimensions (W x H x D)	12 mm x 100 mm x 68 mm
Weight	Approx. 70 g
Operating Temperature	-25 to +60 degC
Storage Temperature	-40 to +85 degC
Relative Humidity	95%, non-condensing

Connections and Interfaces

Connection Parameter	Specification
Wiring Method	Spring actuation by screwdriver (solid, flexible, or ferruled conductors)
Solid/Stranded Wire Section	0.08 to 2.5 mm² (AWG 28 to 14)
Ferruled Wire Section	0.14 to 1.5 mm² (AWG 26 to 16)
Stripping Length	8 to 9 mm
Current Load Power Contacts	Max. 10 A

Installation Guidelines

The EL3681 EtherCAT Terminal is designed for direct mounting on 35 mm DIN rails conforming to EN 60715. Side-by-side mounting is achieved securely via an integrated double slot and key connection mechanism. Ensure the mounting position provides adequate heat dissipation to keep operating temperatures within the -25 to +60 degC range. For wiring, use correct stripping lengths of 8 to 9 mm to guarantee secure clamping contact within the spring terminals.

Compliance and Certifications

CE: Conforms to relevant European directives.
EMC Immunity: Conforms to EN 61000-6-2.
EMC Emission: Conforms to EN 61000-6-4.
Vibration Resistance: Conforms to EN 60068-2-6.
Shock Resistance: Conforms to EN 60068-2-27.

Key Features:

#EtherCAT #EtherCAT Terminals

What is the primary function of the Beckhoff EL3681?

The Beckhoff EL3681 operates as an integrated digital multimeter terminal, enabling direct measurement of AC and DC voltage (up to 300 V) and current (up to 10 A) in an EtherCAT I/O system.

Does the EL3681 support automatic range switching?

Yes, the EL3681 features both automatic and manual range selection to optimize accuracy and resolution during operation.

How does the EL3681 process AC and DC signals?

It performs arithmetic averaging for DC signal calculations and True RMS (root-mean-square) calculation for AC signals.

What fuse protection is built into the EL3681 terminal?

The terminal is equipped with an integrated 1.25 A fuse along with an easily accessible spare fuse stored within the housing.

What is the typical electrical isolation of the module?

The module provides robust galvanic isolation of up to 1500 V between the internal E-bus and the field potential.

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

Country of origin

BECKHOFF EL3681 EtherCAT Terminal Analog Input Multimeter Module