The CSH02.1B-CC-EC-PB-L3-EM-NN-FW controller is produced by Bosch Rexroth Indramat and belongs to the CSH Advanced Controllers series. It serves as the central motion and communication unit for a servo axis, generating command data and passing it to downstream power sections in automated machinery. In operation, it handles axis-level control tasks together with network communication so the connected drive system can respond with consistent timing. By combining axis control, fieldbus connectivity, and safety functions in one module, it reduces the number of separate control components needed in cabinet installations and keeps the control layout compact.

Two programmable analog channels supply command signals with a voltage swing of ±10 V, and each step is resolved at 6 mV/Incr for fine adjustment of drive torque or speed. Both channels share a dedicated digital-to-analog section, so the controller provides 2 simultaneous analog references without requiring external converters. The controller draws its logic power from a 24 V DC control supply. Motion feedback is accepted through a multi-encoder interface that can emulate absolute or incremental formats, which broadens compatibility with different transducers and supports integration with varied feedback devices. Communication with higher-level PLCs is carried over PROFIBUS-DP, while a local RJ-45 100Base-TX engineering port supports setup access, and output pulse trains are limited to a minimum width of 1 ms.

At power-up, the base section has an inrush current below <5 A, and steady consumption settles at 17 W during normal operation. This low power demand helps limit heat buildup inside the cabinet and keeps ventilation requirements straightforward during continuous use. Real-time coordination with drives is handled by the Sercos III Master interface, which exchanges cyclic data for synchronized motion control and stable communication between the control layer and the drive. For risk-reduced stops, the module integrates Safe Torque Off, which disables energy in the drive channel without interrupting the auxiliary control electronics.