CX 1500-B520-1001 Beckhoff
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The Beckhoff CX 1500-B520-1001 is a DeviceNet fieldbus module from the CX Embedded PC Systems series. It acts as a slave node, supports a maximum of 2 modules per system, and connects using a PC104 system interface. The module is designed for top-hat rail mounting and measures 100 mm in height, 38 mm in width, and 91 mm in depth.
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Product Description:
The CX 1500-B520-1001 is a plug-in communication module for the CX Embedded PC Systems series from Beckhoff. Designed as an add-on to the embedded controllers, the unit provides an interface between the embedded PC backplane and a DeviceNet network. By inserting the module next to the CPU, machine builders can integrate discrete sensors, drives, or remote I/O devices that communicate over a DeviceNet fieldbus without adding a separate gateway. The module allows the host controller to operate as a network node for distributed industrial automation tasks.
The module measures 91 mm deep, 100 mm high, and 38 mm wide, allowing it to fit within the standard CX housing envelope and maintain uniform airflow between stacked components. It locks onto a top-hat rail, so installation involves a downward snap onto the 35 mm profile commonly found in control cabinets. Communication takes place on a DeviceNet trunk; the internal electronics translate the CAN-based protocol to the parallel data lines of the CX bus, preserving deterministic exchange of process variables between the PC processor and external devices. Despite the compact footprint, the housing maintains clearance for adjacent modules and keeps the spring-cage terminals accessible after wiring.
As a fieldbus node, the module functions strictly as a slave node, meaning cyclic traffic is initiated by an external DeviceNet master while the CX replies with status and I/O data. The backplane link follows the PC104 standard, so bus signals are delivered over a 104-pin connector already present on each compatible CX CPU segment. A single embedded PC can accept up to 2 fieldbus cards, allowing separate network segments or increased I/O density without requiring a separate controller. TwinCAT libraries provide software support, allowing the installation to appear as another I/O channel within the runtime system.
