IP3112-B310-0000 Beckhoff
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The Beckhoff IP3112-B310-0000 is part of the IP Compact Box Units series and features four analog current input channels with differential input topology. It offers channel isolation up to 500 V, accepts a maximum sensor supply of 30 VDC, and connects via an M12 screw-in interface. Designed for use in PROFIBUS fieldbus systems, it also provides resolution of 15 bits plus sign and a conversion time of 140 ms.
Internal Product Review
The IP3112-B310-0000 is a Beckhoff analog current input module for PROFIBUS networks with 4 channels. Differential input topology and 500 V channel isolation support clean signal handling in demanding distributed I/O applications. The 15-bit-plus-sign resolution is a strong highlight for precise acquisition.
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Product Description:
The IP3112-B310-0000 from Beckhoff belongs to the IP Compact Box Units series. This module provides four isolated analog current input channels for decentralized automation, allowing process instruments to be wired directly at the machine. By digitizing the loop signals and forwarding them over a fieldbus, the unit removes the need for long parallel cable runs and delivers accurate plant data to the controller. The compact enclosure houses the A/D conversion electronics and the required sensor power feed, making it suitable for distributed installation in industrial environments. Decentralized mounting also places the signal interface closer to transmitters, which helps reduce noise pickup on measurement wiring.
Each of the 4 input channels uses differential wiring and presents an input resistance of 80 Ω, so loop devices see a predictable load. Galvanic separation of 500 V exists between field and logic segments, and a permitted common-mode voltage of 35 V helps protect against ground shifts. The converter samples all channels in 140 ms and applies one of ten selectable input filters before updating a process image organized as four 16-bit words. Quantization is performed with 15 bits plus sign of resolution, and the total measurement deviation remains within ±0.3 % FS under specified conditions. The combination of isolation, filtering, and stable conversion supports repeatable acquisition of current-loop signals in distributed I/O networks.
Communication is handled by the PROFIBUS fieldbus system, enabling direct integration with Beckhoff or third-party masters. Downstream data and auxiliary modules attach through a single 1 x M8, 4-pin port, while an identical M8 connector supplies the internal electronics from the trunk line. Connected transducers can draw up to 30 VDC from the onboard sensor supply, and signal pairs terminate at an M12 screw-in interface that helps keep wiring secure under vibration. This layout supports compact machine-level installation and keeps field connections grouped at the module rather than routed back to a central cabinet.
