7CP476-020.9 B & R Automation
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The B & R Automation 7CP476-020.9 is a controller from the System 2003 Controllers series that operates on 24 VDC input and has a voltage range of 18 to 30 VDC. It offers a fastest task cycle of 1 millisecond, an instruction cycle of 0.5 microseconds, and features a Can Rate of 500 kBit/s. The device includes one PCMCIA slot, provides 750 KB of user RAM, and has 1.5 MB of FlashPROM for user storage.
Internal Product Review
The 7CP476-020.9 is a B & R Automation System 2003 controller with 24 VDC input and IP20 protection for dependable cabinet integration. A 0.5 µs instruction cycle and 1 ms fastest task cycle support sharp response in time-sensitive control applications. Strong processing behavior makes this controller a very capable choice for compact automation platforms.
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Product Description:
The 7CP476-020.9 CPU module is manufactured by B & R Automation as part of the System 2003 Controllers series. Designed for rack mounting alongside digital and analog I/O cards, it functions as the deterministic control core within small and mid-sized machines. By interpreting compiled application code and exchanging data with field devices, the module orchestrates sequencing, interlocking, and motion tasks required in industrial automation cells.
Execution speed is indicated by an instruction time of 0.5 µs, allowing arithmetic and logic operations to complete rapidly inside a user task that can be scheduled at a minimum period of 1 ms. Network throughput is balanced between a CAN interface that transmits process data at 500 kBit/s and a diagnostic RS-232 port that streams status messages at 57.6 kBit/s. The power stage accepts a nominal control supply of 24 VDC, and the design tolerates input excursions within an 18 to 30 VDC window to maintain operation during brownouts. One insert slot allows attachment of a specialized I/O carrier, and a dedicated PCMCIA slot supports removable media.
Onboard memory consists of 750 KB SRAM for volatile variables, a boot-loader area of 512 KB FlashPROM, and an application store of 1.5 MB FlashPROM, giving the controller space for structured programs, trend buffers, and retentive data. Typical energy draw is 20.0 W, while the front I/O port can supply 11.8 W to external sensors. Heat dissipation remains controlled when the unit is mounted horizontally in ambient temperatures from 0 to +60 °C. Four screw-in slots anchor the housing to the DIN rail and help maintain the declared IP20 rating by preventing vibration-induced gaps. The module does not require additional fan cooling when installed in a System 2003 rack.
