CX8031 Beckhoff
Wake Industrial LLC is not an authorized distributor of this product.
The Beckhoff CX8031 is part of the CX Embedded PC Systems series and features a 32-bit ARM-based CPU with passive cooling. It has a PROFIBUS DP Slave fieldbus interface and is supplied with 24 VDC at a current of 2.0 A. The unit's dimensions are 64 mm by 100 mm by 73 mm, and it weighs 180 grams.
Internal Product Review
The CX8031 is a well-designed embedded PC featuring a 32-bit ARM-based CPU and a PROFIBUS DP Slave fieldbus interface. Passive cooling and a 24 VDC supply make cabinet integration straightforward while supporting stable control operation. A maximum ambient rating of 55 °C gives this unit strong appeal for demanding industrial installations.
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Product Description:
The CX8031 embedded controller is produced by Beckhoff within the CX Embedded PC Systems series. This DIN-rail module combines a CPU, power supply, and fieldbus coupler, allowing it to run TwinCAT PLC tasks next to the I/O stack of an automation cell. By integrating computation and communication in a compact housing, the unit fits inside distributed control cabinets and provides a deterministic interface between machine-level signals and higher-level supervisory control networks. Its integrated architecture also reduces the number of separate control components required within the cabinet.
The controller operates with a 32-bit ARM-based CPU that executes IEC 61131-3 programs and cyclic communication tasks. A 512 MB microSD SLC card stores the operating system, user code, and log data while providing high write endurance for frequent recipe updates. Program execution heat is removed through passive cooling, which eliminates moving parts and reduces maintenance requirements in dusty enclosures. For real-time field integration, the device provides a PROFIBUS DP slave interface, allowing master stations to read process images without additional gateways. All electronics are supplied by a control circuit rated at 24 V DC. During active operation, the module draws 2.0 A and can continue operating through a brief supply interruption using a capacitive uninterruptible power supply with a one-second hold-up time. A Type B USB service port provides access for setup and diagnostics, while the flash-based architecture eliminates the need for rotating storage media.
The housing measures 64 mm × 100 mm × 73 mm and weighs 180 g, so it places minimal mechanical load on the terminal rail. Internal insulation withstands 500 V dielectric testing, helping maintain electrical separation between internal circuits. The integrated power contacts can forward up to 10 A to downstream I/O terminals without requiring external distribution blocks. Reliable operation is supported at temperatures up to 55 °C when the controller is mounted horizontally. Convection through the side fins carries heat away from internal components and helps maintain the required operating temperature. The compact enclosure leaves room for adjacent terminals and communication modules within space-limited control panels.
