Product Description:

The CML20.1-NP-16D is a CPU-based controller produced by Bosch Rexroth Indramat for the CML IndraControl Hardware series. As a main processor unit, it coordinates program execution and fieldbus communication inside modular machine controls. Its formal product classification is Control Main Unit, which separates it from extension modules that add specialized I/O functions. This arrangement allows motion, logic, and I/O tasks to be handled from one compact platform on production lines without requiring a separate processor for each function group.

This unit carries 16 MB of onboard dynamic memory, so application code, buffer data, and retentive variables can reside locally without external storage. The processor core runs at 192 MHz, which affects instruction throughput and helps support deterministic PLC scan behavior. An embedded STMicroelectronics ST40 CPU provides 32-bit RISC processing with predictable interrupt response for real-time automation tasks. Networking is handled through a dedicated PROFIBUS interface, enabling cyclic exchange of I/O images with remote drives and decentralized I/O stations on the standard fieldbus. The unit uses CPU design variant 1, which identifies the controller version used for this platform.

The housing follows an Inline form factor, so modules mount side by side on a DIN rail and share power and backplane bus lines without additional cabling. Within the internal product hierarchy, this controller belongs to level 20, placing it among mid-range performance modules that balance processing capability and memory capacity. A separate battery-backed section preserves configuration tables and user registers when supply voltage is removed, helping stored settings remain available after shutdown. The primary DRAM segment is automatically refreshed during operation to maintain data integrity throughout continuous duty. This layout supports compact cabinet installation while keeping local control resources and retained data inside the main unit.