Product Description:

The CSB02.1B-ET-EC-CN-L3-EC-NN-FW belongs to the CSB Drive Controllers series produced by Bosch Rexroth Indramat. It is a compact motion controller that combines power electronics, logic, and fieldbus gateways for multi-axis automation. Two RJ-45 Ethernet jacks let the unit join real-time control networks, while dual feedback connectors power incremental or absolute encoders used on servo motors. In conveyor, packaging, and handling cells, the device issues torque or velocity commands and receives position feedback, completing the closed-loop required for precise axis regulation.

The auxiliary bus uses CANopen, and a single segment can host up to 127 drive nodes. When the controller sits at the physical end of that segment, an internal 120 Ω terminator can be enabled to match line impedance and prevent reflections. Primary communication occurs over Multi-Ethernet; its two RJ-45 ports operate at 100Base-TX, allowing EtherNet/IP, EtherCAT, Sercos over Ethernet, or PROFINET traffic without extra hardware. Local machine signals are handled through the base digital interface that provides 7 DI + 1 DIO for functions such as axis-ready, overtravel limits, or fault resets, reducing the need for external I/O cards.

An optional expansion board adds 2 AI, 2 AO, and 8 DIO, so analog position sensors, proportional valves, or stack-light outputs can be wired directly to the controller. Functional safety is implemented with the hardware-based Safe Torque Off channel, which removes gate drive power in under 10 ms. The encoder plugs can source up to 500 mA or 12 W across two ports, supporting Hiperface, EnDat 2.1/2.2, SSI, TTL, or resolver feedback; a second internal supply delivers 350 mA for the STO circuit. Two multi-encoder ports, a 2-channel 100 Mbps switch, and CANopen branching allow the CSB02.1B unit to serve as a compact automation node without external gateways.