Product Description:

The CML40.2-SP-330-NA is a control main unit built by Bosch Rexroth Indramat within the CML IndraControl Hardware series. As a Control Main Unit, it serves as the central computing element in an automation rack, executing user programs, coordinating fieldbus traffic, and delivering deterministic control for machine axes and distributed I/O. Its Series 40 designation places it among mid-range IndraControl platforms that balance computational speed with compact installation footprints on factory floors. In practical use, it supports coordinated machine functions by keeping logic execution and communication tasks in one controller.

The unit relies on an AMD Geode LX800 processor that runs at 500 MHz, providing predictable instruction timing for real-time logic. This processor is supplied in CPU design variant 2, which identifies the installed CPU configuration. Main memory consists of 64 MB DRAM, giving the controller space for IEC 61131-3 code, variable tables, and active process data. Program and diagnostic data move to higher-level systems through a PROFIBUS interface, allowing cyclic communication with drives, remote I/O, and HMI panels. This combination supports stable control behavior in applications that require repeatable scan timing and dependable data exchange.

For non-volatile storage, the controller carries 128 kB NvRAM, so retentive variables and machine counters persist across power cycles without external batteries. An Inline housing permits side-by-side mounting on DIN rail, minimizing cabinet depth while maintaining front access to connectors. Cooling is convection based, and the module operates without a fan, eliminating moving parts in the cooling path. There is no SRAM fitted, so temporary high-speed buffering must reside in DRAM or be handled by connected devices. Retained data can support restart behavior after interruptions, while the housing format helps the unit fit neatly into compact control cabinets.