Product Description:

The CDB01.1C-PB-EN2-EN2-EN1-EN1-S1-S-NN-FW control section is produced by Bosch Rexroth Indramat for the CDB Control Units series. Mounted on an IndraDrive power module, it functions as the logic core that links servo axes with plant-level controllers. The board processes encoder signals, handles fieldbus telegrams, and issues torque and velocity commands so that connected motors follow the programmed motion profiles used in automated assembly lines, packaging equipment, and material-handling stations. It also supervises enable chains and relay outputs that tie the drive into machine safety circuitry.

Power is supplied by a regulated DC 24 V line; at startup the circuitry draws an inrush current of 6 A for 60 ms before returning to steady-state levels. The integrated fieldbus interface employs PROFIBUS messaging on the EIA-RS485 physical layer, allowing cyclic and acyclic data exchange at up to 12 MBaud through a D-Sub 9-pin female port on the front panel. Error counters, watchdog timers, and galvanic isolation protect the bus against reflected signals and device timeouts. Internal signal routing forwards bus traffic to connector X41 for diagnostics, while internal control routines continue to regulate current loops and position loops independently of external scan times.

Sensor and I/O terminals support encoder power, service access, and local signal handling. The secondary encoder port (En2) sources 5.0 V at up to 350 mA to power incremental encoders, complementing the resolver channel that excites 4 kHz windings at 18.2 Vpp. An RS-232 service jack communicates at 115 kBaud for parameter uploads without interrupting motion. The S1 relay contact switches loads rated to DC 24 V / 1 A; its logic input draws only 3 mA and the transistor output can source 0.5 A for status lamps or interlocks.