BECKHOFF ELX3204 Intrinsically Safe EtherCAT Terminal

SKU ELX3204

In stock

12-month warranty
Free returns within 30 days

Manufacturer: BECKHOFF
Product No.: ELX3204
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 ELX3204 is a high-precision, 4-channel analog input terminal designed for direct temperature measurement using resistance temperature detectors (RTDs) in hazardous locations. This intrinsically safe (Ex i) EtherCAT Terminal enables sensors located in explosive atmospheres—such as Zone 0/20 or Zone 1/21—to be wired directly to the I/O system, eliminating the need for external barriers or isolation amplifiers.

Equipped with 16-bit resolution, the BECKHOFF ELX3204 delivers highly accurate temperature signals back to the controller. It supports a broad range of standard resistance-based sensors, including platinum and nickel RTDs, as well as direct resistance measurements. Power for the E-bus and the internal electronics is managed safely through the EtherCAT Terminal system in conjunction with an ELX9560 power supply terminal, ensuring electrical safety and signal isolation.

Features

Four differential analog input channels for RTD sensors and resistance measurements.
Intrinsically safe (Ex i) design for direct connection to sensors in hazardous zones.
High-resolution 16-bit analog-to-digital conversion for precise process value monitoring.
Configurable 2-wire connection technology per channel.
Integrated limit value monitoring, digital filters, and sensor-specific characteristic curve linearization.
Diagnostic capabilities supported by integrated signal LEDs indicating channel status and errors.

Applications

Intrinsically safe temperature monitoring in chemical and petrochemical processing plants.
Direct RTD sensor interfacing inside explosive gas and dust environments (Zone 0/20, Zone 1/21).
Oil and gas refinery process automation where explosion protection is required.
Pharmaceutical processing systems handling volatile solvents.

Technical Specifications

General

Parameter	Specification
Manufacturer	BECKHOFF
Model	ELX3204
Product Type	EtherCAT Terminal, Analog Input, Ex i
Number of Inputs	4 differential inputs
Design Form	Compact terminal housing with signal LEDs
Material	Polycarbonate

Electrical and Power

Parameter	Specification
Power Supply	Via the E-bus
Supply Voltage Electronics	24 V DC (via power contacts), ELX9560 power supply required
Current Consumption E-bus	typ. 70 mA
Current Consumption Power Contacts	typ. 10 mA
Power Contacts	2 blade/spring contacts

Signal and Measurement

Parameter	Specification
Sensor Types	Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KT(Y) sensors, resistance (10 Ohm to 4 kOhm)
Connection Method	2-wire
Temperature Range (Pt sensors)	-200 to +850 degC
Temperature Range (Ni sensors)	-60 to +250 degC
Resolution	16 bit (up to 0.01 degC per digit; preset: 0.1 degC per digit)
Measuring Current	< 1 mA (depending on sensor and measuring range)
Measuring Error	< +-0.3% (relative to full scale value)
Internal Resistance	typ. >= 10 kOhm (differential)
Input Filter Limit Frequency	typ. 1 kHz
Conversion Time	10 to 3300 ms (adjustable, default: 270 ms)

Mechanical, Environmental, and Connection

Parameter	Specification
Dimensions (W x H x D)	12 mm x 100 mm x 68 mm
Weight	approx. 60 g
Installation	On 35 mm DIN rail (EN 60715) with lock
Wiring Technology	Spring actuation by screwdriver
Connection Cross-Section (Solid/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
Operating Temperature	-25 to +60 degC
Storage Temperature	-40 to +85 degC
Relative Humidity	95 %, non-condensing
Protection Rating	IP20

Compliance and Certifications

Parameter	Specification
Approvals and Markings	CE, UL, ATEX, IECEx, cFMus, CCC
ATEX Protection Class	II 3(1)G Ex ec [ia Ga] IIC T4 Gc, II (1)D [Ex ia Da] IIIC, I (M1) [Ex ia Ma] I
IECEx Protection Class	Ex ec [ia Ga] IIC T4 Gc, [Ex ia Da] IIIC, [Ex ia Ma] I

Installation Guidelines

Ensure the entire automation system and the mounting rack are de-energized before mounting the module.
Verify that the terminal is correctly mounted on a standard 35 mm DIN rail (EN 60715) using the integrated double slot and key connection.
Ensure standard Ex i safety spacing and isolation distances are strictly maintained between intrinsically safe and non-intrinsically safe cabling.
Use a dedicated BECKHOFF ELX9560 power supply terminal to provide compliant E-bus power and safety segregation to the ELX segment.
Connect the RTD sensors using the designated 2-wire configuration, maintaining appropriate shielding and grounding practices for hazardous locations.
Confirm that the terminal block is securely locked on the DIN rail and that status LEDs operate correctly upon system initialization.

FAQ

What is the primary function of the BECKHOFF ELX3204 terminal?

The BECKHOFF ELX3204 is a 4-channel analog input terminal designed to interface directly with resistance temperature detectors (RTDs) in explosive or hazardous areas without requiring separate external barriers.

Which sensor types are compatible with the BECKHOFF ELX3204?

The BECKHOFF ELX3204 supports a wide range of standard RTD sensors including Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, and direct resistance measurements ranging from 10 Ohm to 4 kOhm.

Is an external power supply required for the BECKHOFF ELX3204?

Yes, the BECKHOFF ELX3204 requires power via the E-bus. For intrinsically safe applications, it must be powered using the BECKHOFF ELX9560 power supply terminal to ensure appropriate safety isolation and power regulation.

What explosive zone ratings does the BECKHOFF ELX3204 carry?

The BECKHOFF ELX3204 carries extensive intrinsically safe certifications including ATEX and IECEx ratings of II 3(1)G Ex ec [ia Ga] IIC T4 Gc, enabling direct wiring to sensors located in Zone 0/20 and Zone 1/21.

What is the measurement resolution of the BECKHOFF ELX3204?

The BECKHOFF ELX3204 features high-performance 16-bit analog-to-digital conversion, allowing temperature resolution up to 0.01 degC per digit depending on the configuration (default is preset to 0.1 degC per digit).

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Product Image	Model Number / Title	Condition	Availability	Action
	Allen-Bradley 1769-IF8 Compact I/O Analog Input Module	Original New	In Stock	View 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.

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TECHNICAL SPECIFICATIONS

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