IL2301-B520-0000 Beckhoff
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The Beckhoff IL2301-B520-0000 is part of the IL Coupler Box Units series and supports the DeviceNet fieldbus protocol. It features 4 digital inputs, 4 digital outputs, and provides an IP-Link extension interface via optical fiber. This unit is housed in PA6 polyamide with an IP65/66/67 ingress protection rating, and uses M8 bolted connectors.
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Product Description:
The IL2301-B520-0000 coupler box is produced by Beckhoff for the IL Coupler Box Units series. Acting as a decentralized gateway, it terminates a DeviceNet fieldbus trunk and forwards signals to downstream extension modules, allowing machine-mounted sensors and actuators to connect through a single sealed block. The unit is intended for field installation in industrial automation lines where compact, protected hardware simplifies discrete I/O distribution along conveyors, assembly stations, or packaging equipment.
It provides 4 digital inputs for reading proximity switches or pushbuttons and 4 digital outputs for driving indicator lamps or solenoid valves. Host communication takes place through the DeviceNet protocol, ensuring interoperability with common PLC adapters. Downstream expansion uses the IP-Link interface, and the data stream is carried over optical fiber, so electrical noise on the machine frame does not affect signal integrity. The enclosure is rated IP65/66/67, providing complete protection against dust as well as resistance to water jets and temporary immersion under the applicable test conditions. Because the box is not programmable, the higher-level controller handles parameterization, and diagnostic bits are relayed over the fieldbus without local scripting.
The housing is molded from PA6 polyamide, and the internal electronics are sealed with polyurethane potting to resist vibration and moisture. External wiring uses a single M8 screw-locking connector that resists shock and helps prevent accidental disconnection. Two sets of M3 threaded mounting holes allow the block to be fastened directly to machine plates in any installation position. All exposed metal parts are made of nickel-plated brass to limit corrosion, while the signal contacts use a gold-plated copper-zinc alloy for stable, low-resistance connections. The optical backplane path can accept up to 120 extension modules without additional repeaters, supporting long modular chains on large equipment.
