X20CP0291 B & R Automation
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The X20CP0291 is a compact automation controller manufactured by B & R Automation, part of the X20 Fieldbus Input Output Modules series. It features an embedded µP 16 processor, an instruction cycle time of 0.8 microseconds, and a 100BASE-TX Ethernet port with a transfer rate of 100 Mbit/s. The device has a permanent memory of 2.75 kB FRAM, 1 MB FlashPROM user PROM, and 100 kB SRAM user RAM, with a power consumption of 2.7 W and protection rating of IP20.
Internal Product Review
The X20CP0291 is a compact X20 control module built with an Embedded µP 16 processor and 100 kB SRAM. Fast execution is a clear advantage, with a 0.8 µs instruction cycle time and 4 ms task cycle time supporting responsive machine control. A shielded RJ45 Ethernet port and 100 Mbit/s transfer rate make the X20CP0291 a strong choice for dependable networked automation.
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Product Description:
The X20CP0291 is a compact CPU module produced by B & R Automation for the X20 Fieldbus Input Output Modules series. Installed on X20 backplanes, this unit functions as the central processor for distributed control systems, executing logic, coordinating I/O sub-modules, and handling Ethernet communication in industrial automation environments. Its compact format suits control cabinets where modular I/O, local processing, and network communication must be combined in a small space.
It uses an Embedded μP 16 processor to interpret machine code within an instruction cycle of 0.8 µs, enabling high-resolution control algorithms on motion or process lines. A task cycle time of 4 ms schedules cyclic program sections for deterministic reaction to field events and alarms. Network traffic is handled through the 100BASE-TX interface that transfers packets at 100 Mbit/s over a single shielded RJ45 connector; Auto-MDI/MDIX automatically selects crossover or straight-through wiring. During operation, the controller dissipates only 2.7 W, reducing cabinet heat and easing power supply sizing. Retentive data are safeguarded in 2.75 kB FRAM, while dynamic variables occupy 100 kB SRAM, providing space for recipe parameters, counters, and temporary buffers.
Application code and firmware reside in 1 MB FlashPROM, allowing field updates without removing the module from its rail. The housing carries an IP20 protection rating, so the controller must be mounted inside an enclosed panel while remaining finger-safe during service access. With a width of 37.5 mm, it fits next to expansion and power modules without wasting DIN-rail space. A real-time clock with 1 s resolution timestamps data logging and diagnostic entries, and the permitted Ethernet segment length of 100 m provides flexibility for larger machine layouts. Automatic crossover detection and the processor's instruction performance support tight control loops without exceeding the low operating power level.
