EL3314-0002 Beckhoff
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The Beckhoff EL3314-0002 is part of the EL EtherCAT Terminals series and offers four inputs for temperature measurement using 2-wire connection technology. It features a 24-bit internal resolution, a voltage measuring range of ±78 mV, and cold junction accuracy of ±1.75 °C. The terminal is designed with functional isolation at 2.5 kV and has a protection class of IP20.
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Product Description:
The EL3314-0002 is a four-channel thermocouple input terminal manufactured by Beckhoff for the EL EtherCAT Terminals series. Intended for distributed control architectures, the module receives millivolt signals from Type K sensors and delivers digitally converted temperature values to the EtherCAT network. By combining cold-junction compensation, filtering, and A/D conversion in a 12 mm-wide IP20 housing, it streamlines cabinet layouts and supports precise temperature monitoring within automated machinery and process lines.
The measurement chain begins with an internal converter that offers a 24-bit native resolution, allowing very small voltage steps to be distinguished. Its input range of ±78 mV matches typical thermocouple outputs and helps prevent over-range errors, while a temperature display step of 0.01 °C/digit supplies finely graduated process data to the PLC. Cold-junction accuracy is held within ±1.75 °C, limiting overall temperature offset when the reference terminals deviate from 25 °C. For further granularity, the device resolves sensor voltage at 1 µV/digit, which supports stable readings even with longer sensor leads. Each input uses 2-wire connection technology and includes open-circuit recognition that flags broken or disconnected probes before incorrect control actions occur.
To protect the high-resolution signal chain, field wiring is galvanically separated from bus electronics by a barrier rated at 2.5 kV. System power is supplied through the backplane with an E-bus demand of only 200 mA, enabling multiple terminals to share a common EtherCAT segment. The compact enclosure meets the IP20 protection class, making it suitable for installation inside control cabinets where accessibility and convection cooling are required. A front-end analog filter with a cutoff frequency of 1 kHz attenuates noise and helps prevent aliasing, while the ±15 V differential limit on the input pins protects the circuitry against wiring errors and transient voltages.
Frequently Asked Questions about EL3314-0002:
Q: How many input channels are available on the Beckhoff EL3314-0002 terminal?
A: The EL3314-0002 terminal provides four independent input channels for connecting temperature sensors.
Q: What is the maximum cable length supported by the EL3314-0002 EtherCAT terminal?
A: The EL3314-0002 supports a maximum cable length of 30 meters between the terminal and the sensor.
Q: What is the internal resolution of the EL3314-0002 terminal?
A: This terminal has an internal resolution of 24 bits, delivering highly precise measurements for connected sensors.
Q: Which sensor type is preset on the Beckhoff EL3314-0002 terminal?
A: The preset sensor type for the EL3314-0002 is Type K, which is commonly used for thermocouple temperature measurements.
Q: What is the functional isolation rating of the EL3314-0002 EtherCAT terminal?
A: It provides functional isolation rated at 2.5 kV to ensure signal integrity and safety.
