Product Description:

The CDB01.1C-SE-ENS-ENS-NNN-MEM-S1-S-NN-FW is a control unit from the CDB Control Units series produced by Bosch Rexroth Indramat. Designed for servo applications, the module acts as the command layer inside an IndraDrive inverter, processing feedback and generating setpoints for torque, velocity, or position control loops. It supports coordination between drive electronics and higher-level PLCs in handling stations, packaging machines, and material-processing lines. This variant includes encoder interfaces and machine I/O while keeping the installation compact within the control cabinet. That arrangement allows one control section to manage several motion and signal functions without requiring separate external feedback modules.

For motion control, the unit manages 2 synchronized drive axes and exchanges deterministic data over the fiber-optic SERCOS II network. Each incremental encoder channel is digitized at 12-bit resolution, allowing fine interpolation of incoming signals. The analog-to-digital path supports a cutoff frequency of 500 kHz and accepts TTL edge rates up to 400 kHz, which helps preserve signal quality during fast position updates. The input circuit uses 120 Ω termination to reduce reflections on long cable runs. Encoder sensors are supplied from an internally regulated 11.6 V rail that can deliver up to 500 mA for differential transmitters and their light sources. This combination supports stable feedback transfer during rapid acceleration, deceleration, and synchronized axis motion.

Absolute position devices are supported through the MEM interface, which outputs data in the SSI serial format. This channel is galvanically isolated to help prevent ground loops, delivers 20 mA of line current, and transfers clock-synchronous frames at 1 MHz for fast homing and reference tasks. Discrete control wiring terminates on an S1 D-Sub 9 female connector, where the inputs recognize 24 V signals at 3 mA and the push-pull outputs can source 24 V at 0.5 A for relays or contactors. Isolated feedback processing also helps separate encoder reference signals from switching noise when feedback and control wiring share the same cabinet space. The control unit can therefore handle absolute feedback devices and discrete field signals within the same module.