IP1011-B318 Beckhoff
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The Beckhoff IP1011-B318 is part of the IP Compact Box Units series and is equipped with eight inputs and operates on a nominal input voltage of 24 VDC. It supports PROFIBUS as the bus system and offers a sensor supply of up to 0.5 A per channel provided by the control voltage. The unit features IP65, IP66, and IP67 protection ratings and uses M8 screw-in connections for both power and signal.
Internal Product Review
The IP1011-B318 is a Beckhoff compact box input unit for PROFIBUS networks with 8 digital inputs. IP65/IP66/IP67 protection and M8 screw-in signal connections support dependable installation in exposed machine-level environments. A 24 VDC nominal input voltage and fast 0.2 ms input filtering make the module a strong choice for responsive field sensing.
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Product Description:
The IP1011-B318 is an industrial I/O module produced by Beckhoff for the IP Compact Box Units series. It is intended to sit outside the control cabinet, close to the machine, where it gathers on-machine sensor states and forwards them to the central controller over a single fieldbus cable. By shifting acquisition of binary signals to the point of origin, the unit reduces cable lengths, lowers electromagnetic interference, and simplifies installation in decentralized automation architectures.
Communication is established through PROFIBUS, and the housing includes an integrated tee connector that lets the bus trunk continue without external junction blocks. The eight input channels are powered from a 24 VDC sensor supply that is derived from the control voltage rail; each draws just 6 mA, so a typical proximity switch can be driven without overloading the upstream power rail. Before an edge is entered into the controller’s cyclic data, a hardware filter of 0.2 ms removes chatter. Once qualified, each state is copied into an 8-bit input process image, giving the PLC direct bit-level access with a constant offset regardless of the scan sequence. This deterministic mapping simplifies ladder logic and minimizes reaction time when the machine depends on quick detection of actuators, guard interlocks, or part-present flags.
For rugged plant areas, the enclosure carries a IP65/IP66/IP67 ingress rating, keeping water jets and dust away from the electronics. The design maintains galvanic separation between control voltage and bus conductors, and sensors can draw up to 0.5 A per channel directly from the module without external fusing. Signal leads terminate on M8 screw-in connectors, while a 4-pin M8 plug supplies power and a second M8 socket passes that supply onward to the next box. The input circuitry adheres to EN 61131-2 Type 2, supporting two- and three-wire proximity devices used in general automation.
