EL4028

BECKHOFF

BECKHOFF EL4028 EtherCAT Terminal

SKU EL4028

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: BECKHOFF
  • Product No.: EL4028
  • Origin Germany
  • Product Type: EtherCAT Terminals
  • Payment: T/T, Western Union
  • Weight: 0.06 kg
  • Dimensions: 12 mm x 100 mm x 68 mm
  • Shipping port: Xiamen
  • Warranty: 12 months

Tags

Analog Output Terminals EtherCAT Terminals
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Product Description

Description

The BECKHOFF EL4028 is an 8-channel analog output EtherCAT terminal designed to generate current signals within the 4 to 20 mA range with a 12-bit resolution. As part of the modular EL-series system, this terminal combines high channel density with a compact 12 mm housing width, enabling efficient space utilization in electrical control cabinets.

The EL4028 utilizes 1-wire connection technology for single-ended signals, connecting directly to field actuators, control valves, and analytical instruments. The terminal features electrical isolation between the internal E-bus circuitry and the field-side signal voltage to ensure signal integrity and protect sensitive processing components.

Equipped with Distributed Clocks (DC) support, the terminal enables precise synchronization with other EtherCAT devices, achieving synchronization accuracy of less than 1 microsecond. Additionally, an optional watchdog timer can be configured to drive the outputs to user-specific safe values using a custom ramp during communication interruptions.

Features

  • Eight independent analog output channels in a 12 mm terminal housing.
  • Standard 4 to 20 mA current loop output signal interface.
  • 12-bit signal conversion resolution.
  • 1-wire connection technology for simplified, single-ended wiring.
  • Support for Distributed Clocks (DC) to ensure highly precise synchronization.
  • Configurable watchdog safety function with user-defined ramp values.
  • Electrical isolation of 500 V between the E-bus and the output signals.

Applications

  • Control of analog current-loop actuators and proportional valves.
  • Integration with variable speed drives and positioning systems.
  • Process control instrumentation interface in automated machinery.
  • Distributed analog output subsystems in EtherCAT network topologies.

Technical Specifications

General Specifications

Parameter Specification
Manufacturer BECKHOFF
Model EL4028
Product Type EtherCAT Terminal
Number of Channels 8
Connection Technology 1-wire, single-ended
Design Form Compact terminal housing with signal LEDs
Material Polycarbonate
Dimensions (W x H x D) 12 mm x 100 mm x 68 mm
Weight Approx. 60 g

Electrical and Signal Data

Parameter Specification
Signal Current 4 to 20 mA
Resolution 12 bit
Conversion Time Approx. 400 us
Load Impedance Less than 150 Ohm
Output Error Less than 0.1 percent (relative to end value)
Power Supply 24 V DC via power contacts
E-bus Current Consumption Typ. 100 mA
Power Contacts Current Consumption Typ. 60 mA
Max. Current Load Power Contacts 10 A
Electrical Isolation 500 V (E-bus to signal voltage)
Process Image Bit Width 8 x 16 bit AO output

EtherCAT and Communication

Parameter Specification
Distributed Clocks (DC) Yes
Distributed Clocks Precision Less than 1 us
Special Features Optional watchdog: user-specific output value with ramp; optional user synchronization

Environmental and Wiring

Parameter Specification
Operating Temperature -25 to +60 degC
Storage Temperature -40 to +85 degC
Relative Humidity 95 percent, no condensation
Protection Rating IP20
Installation Position Variable
Mounting 35 mm DIN rail (EN 60715) with lock
Wiring Type Solid conductor, flexible conductor, and ferrule (spring actuation)
Conductor Cross-section (Solid/Stranded) 0.08 to 2.5 mm square (AWG 28 to 14)
Conductor Cross-section (Ferrule) 0.14 to 1.5 mm square (AWG 26 to 16)
Stripping Length 8 to 9 mm
EMC Immunity/Emission Conforms to EN 61000-6-2 / EN 61000-6-4
Vibration/Shock Resistance Conforms to EN 60068-2-6 / EN 60068-2-27

Installation Guidelines

  1. De-energize System: Ensure that the field power supply and the E-bus power supply are completely switched off before mounting, removing, or wiring the terminal.
  2. Physical Mounting: Snap the terminal onto a standard 35 mm DIN rail (conforming to EN 60715). Ensure the double slot and key connections engage properly with neighboring terminals.
  3. Secure Wiring: Strip conductors to a length of 8 to 9 mm. Actuate the integrated spring clamps using a standard flat-head screwdriver to insert solid, stranded, or ferruled conductors.
  4. Supply Verification: Confirm that the 24 V DC supply is properly distributed through the power contacts. Ensure the total current through the power contacts does not exceed 10 A.
  5. Initial Configuration: Power up the system and scan the node structure using TwinCAT System Manager to map the 8 x 16-bit analog output process image.

Compliance and Certifications

  • CE
  • UL
  • ATEX: II 3 G Ex nA IIC T4 Gc
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.
FAQ
What is the primary function of the BECKHOFF EL4028 terminal?
The BECKHOFF EL4028 is an 8-channel analog output EtherCAT terminal designed to output current signals in the range of 4 to 20 mA with a 12-bit resolution for industrial actuators and control elements.
Does the BECKHOFF EL4028 support Distributed Clocks (DC)?
Yes, the BECKHOFF EL4028 features Distributed Clocks (DC) support, allowing output synchronization with other EtherCAT system components with a precision of less than 1 microsecond.
What safety behavior does the BECKHOFF EL4028 have during a loss of communication?
The BECKHOFF EL4028 includes an optional watchdog timer that can be configured to transition the analog outputs to pre-defined safe values using a custom ramp in the event of an EtherCAT communication failure.
What connection technology and conductor sizes are supported by the BECKHOFF EL4028?
The BECKHOFF EL4028 utilizes a 1-wire connection technology with single-ended outputs. It supports solid or stranded conductors from 0.08 to 2.5 mm square (AWG 28 to 14) and ferruled conductors from 0.14 to 1.5 mm square (AWG 26 to 16).
What is the electrical isolation rating of the BECKHOFF EL4028?
The BECKHOFF EL4028 provides electrical isolation of 500 V between the internal E-bus control circuitry and the field-side analog signal voltage.
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BECKHOFF EL4028 EtherCAT Terminal

Only 10 item(s) left in stock

  • Manufacturer: BECKHOFF

  • Product No.: EL4028

  • 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

View full details
Product Description
FAQ
Shipping Returns
Additional details
Reviews

Description

The BECKHOFF EL4028 is an 8-channel analog output EtherCAT terminal designed to generate current signals within the 4 to 20 mA range with a 12-bit resolution. As part of the modular EL-series system, this terminal combines high channel density with a compact 12 mm housing width, enabling efficient space utilization in electrical control cabinets.

The EL4028 utilizes 1-wire connection technology for single-ended signals, connecting directly to field actuators, control valves, and analytical instruments. The terminal features electrical isolation between the internal E-bus circuitry and the field-side signal voltage to ensure signal integrity and protect sensitive processing components.

Equipped with Distributed Clocks (DC) support, the terminal enables precise synchronization with other EtherCAT devices, achieving synchronization accuracy of less than 1 microsecond. Additionally, an optional watchdog timer can be configured to drive the outputs to user-specific safe values using a custom ramp during communication interruptions.

Features

  • Eight independent analog output channels in a 12 mm terminal housing.
  • Standard 4 to 20 mA current loop output signal interface.
  • 12-bit signal conversion resolution.
  • 1-wire connection technology for simplified, single-ended wiring.
  • Support for Distributed Clocks (DC) to ensure highly precise synchronization.
  • Configurable watchdog safety function with user-defined ramp values.
  • Electrical isolation of 500 V between the E-bus and the output signals.

Applications

  • Control of analog current-loop actuators and proportional valves.
  • Integration with variable speed drives and positioning systems.
  • Process control instrumentation interface in automated machinery.
  • Distributed analog output subsystems in EtherCAT network topologies.

Technical Specifications

General Specifications

Parameter Specification
Manufacturer BECKHOFF
Model EL4028
Product Type EtherCAT Terminal
Number of Channels 8
Connection Technology 1-wire, single-ended
Design Form Compact terminal housing with signal LEDs
Material Polycarbonate
Dimensions (W x H x D) 12 mm x 100 mm x 68 mm
Weight Approx. 60 g

Electrical and Signal Data

Parameter Specification
Signal Current 4 to 20 mA
Resolution 12 bit
Conversion Time Approx. 400 us
Load Impedance Less than 150 Ohm
Output Error Less than 0.1 percent (relative to end value)
Power Supply 24 V DC via power contacts
E-bus Current Consumption Typ. 100 mA
Power Contacts Current Consumption Typ. 60 mA
Max. Current Load Power Contacts 10 A
Electrical Isolation 500 V (E-bus to signal voltage)
Process Image Bit Width 8 x 16 bit AO output

EtherCAT and Communication

Parameter Specification
Distributed Clocks (DC) Yes
Distributed Clocks Precision Less than 1 us
Special Features Optional watchdog: user-specific output value with ramp; optional user synchronization

Environmental and Wiring

Parameter Specification
Operating Temperature -25 to +60 degC
Storage Temperature -40 to +85 degC
Relative Humidity 95 percent, no condensation
Protection Rating IP20
Installation Position Variable
Mounting 35 mm DIN rail (EN 60715) with lock
Wiring Type Solid conductor, flexible conductor, and ferrule (spring actuation)
Conductor Cross-section (Solid/Stranded) 0.08 to 2.5 mm square (AWG 28 to 14)
Conductor Cross-section (Ferrule) 0.14 to 1.5 mm square (AWG 26 to 16)
Stripping Length 8 to 9 mm
EMC Immunity/Emission Conforms to EN 61000-6-2 / EN 61000-6-4
Vibration/Shock Resistance Conforms to EN 60068-2-6 / EN 60068-2-27

Installation Guidelines

  1. De-energize System: Ensure that the field power supply and the E-bus power supply are completely switched off before mounting, removing, or wiring the terminal.
  2. Physical Mounting: Snap the terminal onto a standard 35 mm DIN rail (conforming to EN 60715). Ensure the double slot and key connections engage properly with neighboring terminals.
  3. Secure Wiring: Strip conductors to a length of 8 to 9 mm. Actuate the integrated spring clamps using a standard flat-head screwdriver to insert solid, stranded, or ferruled conductors.
  4. Supply Verification: Confirm that the 24 V DC supply is properly distributed through the power contacts. Ensure the total current through the power contacts does not exceed 10 A.
  5. Initial Configuration: Power up the system and scan the node structure using TwinCAT System Manager to map the 8 x 16-bit analog output process image.

Compliance and Certifications

  • CE
  • UL
  • ATEX: II 3 G Ex nA IIC T4 Gc
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Key Features:
#Analog Output Terminals #EtherCAT Terminals

What is the primary function of the BECKHOFF EL4028 terminal?
The BECKHOFF EL4028 is an 8-channel analog output EtherCAT terminal designed to output current signals in the range of 4 to 20 mA with a 12-bit resolution for industrial actuators and control elements.

Does the BECKHOFF EL4028 support Distributed Clocks (DC)?
Yes, the BECKHOFF EL4028 features Distributed Clocks (DC) support, allowing output synchronization with other EtherCAT system components with a precision of less than 1 microsecond.

What safety behavior does the BECKHOFF EL4028 have during a loss of communication?
The BECKHOFF EL4028 includes an optional watchdog timer that can be configured to transition the analog outputs to pre-defined safe values using a custom ramp in the event of an EtherCAT communication failure.

What connection technology and conductor sizes are supported by the BECKHOFF EL4028?
The BECKHOFF EL4028 utilizes a 1-wire connection technology with single-ended outputs. It supports solid or stranded conductors from 0.08 to 2.5 mm square (AWG 28 to 14) and ferruled conductors from 0.14 to 1.5 mm square (AWG 26 to 16).

What is the electrical isolation rating of the BECKHOFF EL4028?
The BECKHOFF EL4028 provides electrical isolation of 500 V between the internal E-bus control circuitry and the field-side analog signal voltage.

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

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