Product Description:

The 5AC801.HDDI-00 is a hard disk drive module manufactured by B & R Automation for the 5AC CNC Addon Modules series. As a removable storage element for industrial controllers, it retains motion programs, parameter sets, and operating data after emergency stops or routine shutdowns. This makes it suitable for applications that need local retention of machine data between power cycles. Its housing matches other 5AC cards, which supports a uniform installation layout within the control system.

Its 5.6 ms average access time allows the CNC kernel to fetch small data blocks without noticeable delay. A disk capacity of 40 GB is divided into 78,140,160 logical sectors of 512 bytes each, so large tool libraries and event archives can be stored locally. The onboard cache of 8 MB temporarily holds frequently requested sectors to reduce mechanical seeks. Data moves through a SATA interface, and the controller-side host transfer rate reaches 150 MB/s for steady exchange of stored files and position tables. Local storage also helps when programs and logs must be accessed without depending on network retrieval. A single read/write head sweeps the platters, which helps keep the mechanism simple and limits noise during operation.

Inside the sealed chassis, the disks turn at 5400 rpm, producing an internal transfer rate of 450 Mbit/s between the media and cache so sequential logging does not slow the axis processor. SMART health reporting is enabled, allowing the controller to monitor rising error counts during service life. The enclosure is 13 mm wide, 98 mm high, and 105 mm deep, which helps multiple modules fit on a shared carrier plate. The compact form also leaves room for cable routing and neighboring modules in dense cabinets. With a mass of 134 g, the module adds little load to adjacent electronics and leaves more open space for airflow around nearby components.