Product Description:

The CML40.1-SP-320-NA-NNNN-NW is a Control Main Unit produced by Bosch Rexroth Indramat for the CML IndraControl Hardware series. As the central computing section of an automation rack, it executes motion, logic, and communication tasks for distributed drives and I/O modules on a production line. By integrating processor, memory, and fieldbus interfaces in a single housing, the unit simplifies system wiring and coordinates deterministic control cycles required for repeatable machine performance.

At its core, the unit uses a National Geode SC1200 processor that operates at 266 MHz, providing deterministic cycle times for mid-range PLC and motion sequences. Volatile storage is organized in two blocks: a base allocation of 32 MB DRAM that supports operating system functions and an expanded bank that brings total working memory to 64 MB, allowing larger user programs or visualization data to reside entirely onboard. Non-volatile retention for parameters and diagnostic logs is delivered by 64 kB NvRAM, avoiding data loss when power is removed. The PROFIBUS interface, presented through an onboard controller, offers master or slave connectivity on segmented fieldbus networks; the high-speed nature of the bus enables timely exchange of setpoints and status words with drives, remote I/O, and HMI panels.

The electronics are fitted in an Inline housing that mates directly with adjacent expansion modules, so no backplane cabling is necessary. Thermal management relies on convection, and the unit is configured without a fan, which reduces moving parts and noise but requires cabinet airflow planning. The unit uses CPU design variant 1, indicating a fixed feature set and a straightforward hardware configuration. Because SRAM is not configured, temporary variables reside solely in DRAM, and the lack of auxiliary features helps keep power draw low during operation.