Product Description:

The CSB02.1B-ET-EC-NN-S4-DA-NN-NW drive controller is produced by Bosch Rexroth Indramat as part of the CSB Drive Controllers series. Installed in conjunction with HCS02, HCS03, HCS04, HMS01, or HMS02 power sections, it supplies the control intelligence and field-level connectivity required for coordinated servo operation in industrial automation cells. Its circuitry combines Ethernet, encoder, analog, and discrete interfaces so the higher-level PLC can command motion profiles, collect process data, and supervise safe-stop functions on each axis. The separated control and power architecture also allows the same operating concept to be used across different drive power stages while keeping communication and feedback handling consistent. This arrangement is useful on axes that require centralized motion control with local feedback processing and direct connection to plant-level communication networks.

The analog current loop presents an input resistance of 300 Ω, and the incoming signal is digitized with a resolution of 12-bit for precise torque commands. Voltage feedback is converted at 14-bit, giving tight speed regulation when paired with resolver-based drives. The module refreshes each analog output within 250 µs, enabling fast closed-loop updates for dynamic axes. Encoder channels accept square-wave feedback up to 1000 kHz, while a separate sine track is terminated at 120 Ω to minimize signal reflections. That arrangement helps preserve encoder signal quality when cable runs pass through electrically noisy cabinet spaces. Five configurable digital I/O lines and eleven fixed digital inputs support limit switches, homing sensors, and user interlocks without extra hardware. The mixed interface set allows one controller to process both analog command values and encoder-derived position data at the same time.

An output step granularity of 24 mV per increment lets the controller drive analog references directly into proportional valves or external inverters. The unit has 11 discrete input terminals for start, stop, and fault acknowledgment, and its Ethernet port follows the 100Base-TX standard while consuming only 2.7 W. The controller provides 3 optional slots for expansion such as a safe-motion card or additional fieldbus adapters. This layout allows application-specific features to be added without separate interface modules, which helps keep multi-axis cabinets compact while preserving direct access to local signals. It can therefore coordinate external devices that still rely on analog references while maintaining Ethernet communication with the main control system.