IL2301-B903-0000 Beckhoff
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The Beckhoff IL2301-B903-0000 is part of the IL Coupler Box Units series and features 4 digital inputs and 4 digital outputs. It has an IP65/66/67 protection class and supports PROFINET protocol with optical fiber as the IP-link medium. The housing is made of PA6 polyamide and it can connect up to 120 extension modules.
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Product Description:
The IL2301-B903-0000 is an I/O coupler box produced by Beckhoff for the IL Coupler Box Units series. It serves as a compact field module that connects discrete sensors and actuators to a host controller, simplifying decentralized installation on machinery and conveyor systems. By positioning the electronics close to the process and forwarding data over a single bus line, the unit reduces cabinet space and limits the amount of field wiring required throughout an industrial automation system.
The module provides 4 digital inputs and 4 digital outputs, giving it equal capacity for status sensing and device actuation in one housing. Network wiring connects through an M12 D-coded female socket, while an M8 bolted connection supplies auxiliary sensor power. All signal pins are routed to an I/O plane molded from PA6 polyamide, which provides mechanical stability and resistance to common industrial chemicals. The IP-Link backplane exchanges cyclic data between the coupler and connected terminals at 2 Mbit/s. The device can be installed in any orientation and secured through two M3 mounting holes. A polyurethane casting compound encapsulates the electronics to maintain a tight seal against contaminants and moisture. Gold-plated CuZn spring contacts connect to the internal carriers, while nickel-plated brass protects the exposed metal components from corrosion.
System expansion supports the daisy-chain connection of up to 120 additional IP-Link terminals, providing capacity for distributed signals across larger machines. Communication between nodes uses optical fiber, which prevents electromagnetic interference from disrupting data transmission near motors, drives, and switching equipment. The molded enclosure meets the IP65/66/67 ingress protection standard, protecting the internal electronics from dust, water jets, and temporary immersion. Process data are exchanged with a PLC through the PROFINET protocol, while polyurethane encapsulation, nickel-plated hardware, and gold-plated contacts help maintain stable signaling in environments subject to vibration.
