Product Description:

The CSB02.1B-ET-EC-EP-L3-EM-NN-FW is a single-axis drive controller built by Bosch Rexroth Indramat for the CSB Drive Controllers series. The unit conditions feedback, delivers command power, and communicates with upstream PLCs so that servo or induction motors follow velocity, position, or torque references in automated production cells. It consolidates I/O handling, encoder supply, safety switching, and Ethernet networking inside a compact sub-rack assembly, reducing panel wiring while maintaining deterministic motion control. This arrangement also lets one control section manage feedback and field signals without requiring separate interface modules.

On the signal side, the controller offers 3 analog inputs with 13-bit resolution, allowing temperature, pressure, or tension transducers to be read with 8192 discrete steps. It also provides 11 digital inputs for limit switches and interlocks, while the pair of 2 analog outputs can drive external meters or proportional valves with a resolution of 24 mV per increment. The controller tracks signal changes quickly, which helps keep the motion loop responsive during changing operating conditions. A relay channel is rated for 1000 mA and can provide isolated contactor actuation. For functional safety, the Safe Torque Off channel sources 350 mA to external circuits and removes motor energy when the STO logic is asserted. Encoder emulation is routed through a D-Sub 15-pin connector so connected drives can follow the same position reference.

The control electronics draw 17 W at idle and operate from a 24 V DC supply, so the drive can remain active during brief mains dropouts by buffering only the logic rail. Communication uses an 8-pin RJ-45 port with the 100Base-TX standard, supporting cable runs up to 100 m, while the encoder interface allows shielded feedback lines up to 40 m. A resolver input operates at 8 kHz, capturing rotor angle with minimal phase lag. Dedicated 5 V and 12 V rails each deliver 500 mA for encoder power, which helps the controller support connected feedback devices without separate external supplies. Because the logic supply is separate from the higher-power sections, diagnostics and network communication can remain available while the main power path recovers from a short interruption.