Product Description:

The CSH01.2C-PB-EN1-EN1-CCD-S1-S-NN-FW is a single-axis control section from Bosch Rexroth Indramat's CSH Advanced Controllers series. It installs in a modular drive rack and supervises servo or inverter power stages so that motion sequences follow programmed trajectories in automated machinery. By combining fieldbus communications, fast internal control loops, and dedicated safety inputs, the unit serves as the real-time link between a higher-level PLC and the drive hardware that energizes motors and actuators on the plant floor. Its role centers on control, feedback processing, and network exchange, while a matching power section provides the motor current.

The controller's base demand of 8.5 W minimizes cabinet heat while its primary fieldbus channel supports PROFIBUS-DP messaging for parameter access and cyclic setpoints. A current loop closed every 62.5 µs adjusts PWM duty in response to instantaneous load, and the power devices can be switched up to 16 kHz to suppress torque ripple in high-speed servomotors. Bus traffic is handled at a maximum of 12 MBaud, complementing the dual Resolver/HSF encoder inputs that supply rotor angle feedback. The board excites each resolver with 18.2 Vpp at 4 kHz and receives sinusoidal returns that are digitized for commutation. These measurements are synchronized with the drive's analog-modulated gate signals so that vector control remains stable across the working speed range. This arrangement supports responsive torque regulation during rapid speed changes and load disturbances.

Cross-device coordination is achieved through SERCOS III, allowing multi-axis synchronization without separate couplers. Position commands are refreshed every 250 µs, velocity corrections follow at 125 µs, and the 8 V EN1 auxiliary rail powers the onboard logic that orchestrates these cycles. Functional safety is implemented with a D-Sub 9 female connector; its inputs tolerate 24 V at 3 mA, while the safe-output channel can source 24 V / 0.5 A for contactors or valves. The Safety I/O architecture enables drive-based STO or SS1 reactions so that mechanical motion is halted in accordance with risk assessments. Because the safety connector is separate from the motion networks, stop functions can remain available even if normal command traffic is interrupted.