Product Description:

Bosch Rexroth Indramat manufactures the CDB01.1C-S3-ENS-ENS-EN2-EN2-S1-S-NN-FW as part of its CDB Control Units series. This plug-in control section is mounted on an IndraDrive power module to manage motion commands, encoder feedback, and integrated safety channels inside the drive cabinet. The factory-installed combination of two ENS and two EN2 encoder modules allows simultaneous processing of multiple feedback formats, supporting multiturn absolute encoders for axis positioning. Through deterministic network access, the unit links local drive functions with a higher-level PLC, forming an interface between machine sequencing and servo power stages.

The control section communicates over SERCOS III, giving it a time-synchronized channel for setpoints and diagnostic data. An analog input impedance of 160 kOhm prevents loading of external sensors, while each analog output can source up to 5 V / 1 mA for transducer drive. Fine command resolution is achieved with an output step size of 19.5 mV/inc, enabling small adjustments to torque or speed references. Internal electronics draw only 9 W at idle, so enclosure thermal rise remains low even in dense multi-axis racks. Encoder supply is stabilized by ENS rails that provide 500 mA at 5 V, helping maintain noise-free position feedback during rapid motion.

The digital output group can deliver up to 1000 mA, enough to actuate contactors or indicator lamps without external relays. A dedicated encoder rail supplies 11.6 V to the ENS boards, and the module’s typical inrush current peaks at 6 A with a maximum pulse width of 60 ms. For safety circuits, input channels accept 24 V at 3 mA and output channels switch 24 V at 0.5 A under the integrated Safety Technology I/O module. Additional resources include an EN2 load resistance of 35 ohms and a 350 mA supply for resolver-based feedback, allowing diverse sensor combinations without external conditioning.