EL3312 | Beckhoff EtherCAT Terminal 2-Channel Thermocouple Input 16-Bit 500 V Isolation

Beckhoff · Sensors & Instrumentation

Description  The Beckhoff EL3312 is a 2-channel analog input EtherCAT Terminal for direct connection of thermocouples using 2-wire technology. It supports multiple thermocouple types, provides 16-bit resolution, and features internal cold junction compensation with 500 V electrical isolation for precise temperature measurement.     Technical Specifications  Condition New/Never Used Surplus Brand Beckhoff Category Industrial Automation Part Number EL3312 Subcategory EtherCAT Terminal Function 2-channel analog input for thermocouple measurement Number of Inputs 2 Connection Method 2-wire Supported Thermocouples Types B, C, E, J, K, L, N, R, S, T, U (default: K) Resolution 16 bit (0.1/0.01°C or 1/2/4 µV per digit) Input Filter Limit Frequency Typ. 1 kHz Conversion Time 1.2 s to 20 ms (default ~125 ms, configurable) Voltage Measurement Range ±30 / ±60 / ±75 mV Measurement Uncertainty (Temp.) ±2.3°C to ±8.5°C depending on type (at 23°C) Measurement Uncertainty (Voltage) < ±0.14% (at ±75 mV, 23°C) Cold Junction Compensation Internal and external (automatic) Power Supply Via E-bus Current Consumption (E-bus) 200 mA Electrical Isolation 500 V (E-bus/signal voltage) Special Features Channel-by-channel wire break detection, adjustable firmware filter Distributed Clocks Not supported Protection Class IP20 Operating Temperature -25°C to +60°C Storage Temperature -40°C to +85°C Relative Humidity 95%, non-condensing Weight Approx. 60 g   Information About EL3312 The EL3312 is part of Beckhoff’s EL3xxx EtherCAT Terminal series, engineered for accurate and reliable temperature measurement in distributed automation systems. It enables the direct connection of thermocouples via a 2-wire interface, allowing for simplified wiring and high signal integrity. The module supports multiple thermocouple types, including K, J, and T, with automatic cold junction compensation for precise readings across varying ambient conditions. The EL3312 converts analog temperature signals into 16-bit digital data, which is transmitted to the controller via the EtherCAT network. Integrated wire break detection and configurable firmware filtering enhance diagnostic capabilities and measurement stability. With 500 V electrical isolation and robust design, the EL3312 is ideal for industrial process monitoring, heating, and machine control applications. Key Features: Multi-Type Thermocouple Support: Compatible with common thermocouple types (B, C, E, J, K, L, N, R, S, T, U). High Measurement Accuracy: Offers 16-bit resolution and automatic cold junction compensation for precise results. Flexible Conversion Settings: Adjustable conversion time and filter settings for optimized performance and noise immunity. Integrated Diagnostics: Channel-level wire break detection and LED indication for quick fault identification. Voltage Measurement Capability: Also suitable for direct low-voltage signal measurement (±75 mV range). Electrical Isolation: 500 V isolation between signal and E-bus for safe operation in mixed-voltage environments. Compact EtherCAT Design: Enables efficient integration into distributed I/O systems via E-bus power supply. Industrial Durability: Reliable operation across -25°C to +60°C with IP20 protection and high humidity tolerance. The EL3312 delivers the reliability and precision required for temperature monitoring, process control, and automation tasks in EtherCAT-based systems.

Brand: Beckhoff · Category: Sensors & Instrumentation

Key features

• Multi-Type Thermocouple Support: Compatible with common thermocouple types (B, C, E, J, K, L, N, R, S, T, U).
• High Measurement Accuracy: Offers 16-bit resolution and automatic cold junction compensation for precise results.
• Flexible Conversion Settings: Adjustable conversion time and filter settings for optimized performance and noise immunity.
• Integrated Diagnostics: Channel-level wire break detection and LED indication for quick fault identification.
• Voltage Measurement Capability: Also suitable for direct low-voltage signal measurement (±75 mV range).
• Electrical Isolation: 500 V isolation between signal and E-bus for safe operation in mixed-voltage environments.
• Compact EtherCAT Design: Enables efficient integration into distributed I/O systems via E-bus power supply.
• Industrial Durability: Reliable operation across -25°C to +60°C with IP20 protection and high humidity tolerance.

Specifications

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