BECKHOFF

BECKHOFF EL3681 EtherCAT Terminal Analog Input Multimeter Module

SKU EL3681

In stock
  • 12-month warranty
  • Free returns within 30 days
  • 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.

FAQ

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.

View all FAQs →

Quantity
Shipping & Returns

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.

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 technical warranty.
Reviews
1 of 1
Only 10 item(s) left in stock
Quantity
View full details

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
Germany

Technical knowledge

Commissioning OPC UA in KEPServerEX: A Field Checklist

A practical commissioning sequence for KEPServerEX OPC UA connections: define data ownership, test tags locally, configure endpoint and certificate trust, limit access, then verify failure recovery...

Set a PLC Commissioning Laptop IP Without Losing Access

Commissioning an Ethernet-connected PLC often starts with the laptop, not the controller. Learn how to record existing settings, choose a temporary address, test connectivity, and restore the plant...

Designing Automation for Combustible Dust Hazards

Combustible dust controls require more than alarms. Learn how to map dust generation, select instrumentation, design interlocks, handle failed feedback, test safe states, and maintain the full...

Hairpin Stators: Benefits, Limits, and Inspection

Hairpin windings raise slot fill and support compact traction motors, but conductor geometry, AC losses, insulation damage, weld quality, and cooling determine whether the design meets its targets.

Using Ansible for Controlled SCADA Server Changes

Use Ansible to standardize SCADA server changes without expanding OT risk. This guide covers inventories, idempotent playbooks, staged testing, credentials, logging, and practical rollback controls.

Securing Remote PLC Access Beyond the VPN

A VPN encrypts the path to an industrial network, but secure remote PLC work also needs identity controls, segmented access, change approval, logging, safe operating boundaries, and tested recovery...