Product Description:

The IL2301-B905-0000 coupler box is manufactured by Beckhoff and belongs to the IL Coupler Box Units series. This compact I/O station links field sensors and actuators to a higher-level controller through an industrial Ethernet backbone. In automated lines, it provides decentralized digital inputs and outputs directly on the machine frame, reducing cabinet wiring and shortening signal paths. The housing is molded from PA6 polyamide for mechanical strength, and it installs with 3.5 mm mounting holes that suit common panel or machine-mount hardware. Mounting the I/O close to the process also helps keep sensor and actuator cable runs short.

Its communication layer is handled by an EtherNet/IP interface that reaches the controller through a 1 x M12 socket, 4-pin, D-coded port sealed against dust and moisture. Internally, the unit distributes 24 V DC, so the four sourcing outputs can drive loads up to 0.5 A each while the sensor supply operates on the same power rail. Channel allocation is fixed at 4 inputs + 4 outputs, and every input follows EN 61131-2 Type 2 electrical thresholds. An integrated hardware filter accepts a new state only after 3 ms, which helps avoid glitches caused by contact bounce or electrical noise. The M8 screw connectors simplify installation and provide secure vibration-resistant terminations.

Mechanical proportions support mounting in confined trays; the unit has a width of 30 mm, a depth of 26.5 mm, and an overall height of 210 mm. The passive backplane concept lets up to 120 extension modules be connected behind the coupler, with power lines and the data bus continuing automatically through keyed connectors. Network topology can span as much as 100 m between stations, which is enough for most cell or line-length layouts inside factories. Keyed connections also help maintain correct module alignment as the station is expanded. Current limiting at each port helps reduce voltage droop when the I/O tree grows.