IE3112-0000 Beckhoff
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The Beckhoff IE3112-0000 is an extension box unit from the IE Extension Box Units series, featuring 4 analog input channels and differential input architecture. It offers 15 bit plus sign resolution, an input resistance of 80 ohms, and channel-to-control isolation rated at 500 V. The unit is protected to IP65/IP66/IP67 standards and supports connection via M8 and M12 screw-in connectors.
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Product Description:
The IE3112-0000 analog input extension box is produced by Beckhoff as part of the IE Extension Box Units series. Intended for mounting directly on machines, the module brings four-channel signal acquisition to EtherCAT networks without requiring a control cabinet. It accepts standard process currents or voltages from field transmitters, digitizes them, and forwards the data to the PLC so that temperatures, pressures, or levels can be monitored in real time during automated production.
Galvanic separation between the sensor domain and the controller side is rated at 500 V, preventing fault currents from propagating upstream. The differential input stage tolerates a maximum common-mode voltage of 35 V, ensuring reliable measurements even when remote grounds differ. An internal sigma-delta converter completes each scan in 140 ms, and its output is quantized with an effective resolution of 15 bits plus sign. Ten digital filter modes can be selected to balance response time and noise immunity. The enclosure complies with IP65/IP66/IP67 protection ratings, allowing the unit to operate in wet areas and dusty manufacturing cells. The module shares a common internal ground and can energize sensors from the load supply at up to 30 V DC.
Four independent channels accept analog sources, providing 4 analog inputs that are mapped into the controller as a process image of 4 × 16 bits. Each channel presents an input impedance of 80 Ω, which supports compatibility with low-impedance transmitters. Accuracy remains within ±0.3% of full scale across the operating range. The downstream EtherCAT connection is provided through one 4-pin M8 socket, while primary power and sensor feed enter through a second 4-pin M8 connector. Field wiring uses an M12 screw-in interface, which provides secure connections and reduces assembly time in distributed I/O installations.
