Product Description:

Bosch Rexroth Indramat builds the CML75.1-3P-905-NA-NNN-NW as part of its CML IndraControl Hardware series. This unit serves as the central processor in modular machine controllers, coordinating motion, I/O handling, and network communication inside automated cells. It integrates with peripheral racks to execute deterministic logic, positioning, and safety tasks across distributed architectures. Designed for low-profile control cabinets, the module supports backplane expansion so application-specific boards can be added without rewiring. Its role also includes organizing data exchange between local modules and higher-level control layers so operating states remain synchronized during machine cycles. That architecture allows the controller to coordinate several machine sections from one compact location.

The controller ships in design variant 1, a baseline configuration that balances processing speed with power draw. Program execution relies on 4096 MB of DRAM, allowing sizable PLC code, data tables, and visualization objects to reside in high-speed memory. Cyclic buffers are isolated in 16 MB of SRAM, giving stable access latency for real-time tasks. Thermal management is passive because the hardware is supplied without a fan; heat is removed through conduction and natural convection, eliminating moving parts inside the enclosure. An inline housing format lets the unit snap onto a DIN rail while keeping enclosure depth short, which helps in densely packed panels. The layout also keeps adjacent modules close together, which supports compact cabinet arrangements and short internal signal paths.

System communication is handled through a PROFIBUS interface, enabling deterministic fieldbus exchange with drives, remote I/O, and operator terminals over a single RS-485 trunk. Configuration archives are volatile because there is no NvRAM on the board; any data that must survive a restart has to be written to external storage or reloaded from the supervisory network. Acting as the rack’s Control Main Unit, the module schedules tasks, manages interrupts, and publishes diagnostics for attached subsystems. Placement within the series 75 family keeps the mechanical fit aligned with companion power-supply and communication modules. This arrangement supports orderly startup behavior and consistent status exchange across the controller rack.