BECKHOFF ELX3202 EtherCAT Terminal

Description

The BECKHOFF ELX3202 is a 2-channel analog input EtherCAT Terminal designed for precise temperature and resistance measurements in hazardous areas. Serving as an intrinsically safe (Ex i) interface, this terminal allows for the direct connection of resistance temperature detectors (RTDs) located in Zone 0/20 and Zone 1/21 explosion-hazard environments, eliminating the need for external safety barriers.

This compact 12 mm terminal features 16-bit resolution and supports a wide range of sensor types, including Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, and KT(Y) sensors, as well as general resistance measurements up to 4 kOhm. To ensure high measurement accuracy, the ELX3202 incorporates integrated digital filters, limit value monitoring, and sensor characteristic curve linearization.

Designed for seamless integration into the standard Beckhoff EtherCAT I/O terminal system, the ELX3202 requires the use of the ELX9560 power supply terminal to supply safe field-side electronics power in hazardous configurations. It provides flexibility with software-configurable 2-, 3-, or 4-wire connection technologies to accommodate varying field installation requirements.

Features

• Two differential analog inputs with intrinsically safe (Ex i) protection for explosive atmospheres.
• Supports multiple sensor characteristics, including Pt and Ni RTDs, KT(Y) sensors, and direct resistance measurements.
• 16-bit conversion resolution with programmable limit monitoring and digital filtering.
• Flexible connection technologies, allowing 2-wire, 3-wire, or 4-wire wiring configurations.
• Compact 12 mm housing width, maximizing DIN rail space.
• Clear status indication via built-in signal LEDs for rapid diagnostics.

Applications

• Direct temperature monitoring inside Zone 0, 1, 20, or 21 hazardous process environments.
• Intrinsically safe RTD measurements in chemical processing, oil and gas, and petrochemical plants.
• Industrial temperature control systems utilizing Beckhoff TwinCAT engineering environments.

Technical Specifications

General

Electrical Data

Physical and Environmental

Explosion Protection and Certifications

Installation Guidelines

1. Verify Requirements: Confirm that the terminal model matches your installation and zone requirements.
2. De-energize: Disconnect all power sources before mounting or wiring the terminal.
3. Mounting: Snap the terminal securely onto a standard 35 mm DIN rail conforming to EN 60715. Ensure correct side-by-side connection using the integrated double slot and key system.
4. Power Configuration: Ensure the ELX3202 is powered using the appropriate ELX9560 power supply terminal for proper electrical isolation and Ex-protection.
5. Wiring: Connect sensors using solid or stranded conductors (0.08 to 2.5 mm²). Actuate the cage clamp springs using a suitable screwdriver. Note that 2-wire connection is configured by default; adjust settings for 3-wire or 4-wire configurations as needed.
6. Ex-i Separation: Maintain mandatory safety clearances and separation requirements between intrinsically safe (Ex i) wiring and standard industrial circuits.