Product Description:

The CDB02.1B-ET-EC-EC-EM-S4-S4-NN-NN-NW is a modular control unit produced by Bosch Rexroth Indramat within the CDB Control Units series. Installed on the drive side of a Rexroth automation system, the module conditions sensor feedback, issues command voltages, and hosts fieldbus links needed for coordinated multi-axis machines. Its role is to translate higher-level motion instructions into precise electrical signals that govern the connected power inverters and motor feedback loops in industrial automation applications.

The analog front end accepts differential process signals. Each input is filtered to 1.3 kHz so transient noise above that frequency is rejected before conversion. Quantization is performed at 14-bit depth, giving 16,384 discrete levels for fine position or pressure references. On the output side, the controller provides 750 µs of settling time between a command update and a stable voltage, and the voltage step size is 24 mV per increment, enabling granular setpoint generation. The controller has 2 isolated analog outputs for functions such as torque bias or hydraulic proportional valves. Discrete machine states are read through 14 digital inputs that latch at controller scan speed, while probe functions are handled by four dedicated high-speed inputs for edge capture.

Network connectivity is furnished by the Ethernet Technology card, which supports 100Base-TX signaling through an RJ-45, 8-pin socket, and the interface draws 2.7 W from the backplane. A separate EM expansion consumes only 1.2 W, leaving ample headroom for encoder supply. The unit allocates a 6 W budget, split between a 5 V rail and a 12 V rail, with each rail capable of 500 mA for two-channel encoder feedback. Integrated safety complies with IEC 61131 Type 1; when a safe stop is asserted, the high-side transistor can source 350 mA to external relays or contactors. The controller can handle axis control, synchronized data capture, and safe-stop signaling without separate external I/O modules.