Product Description:

The CDB01.1C-SE-ENS-ENS-NNN-MEM-L2-S-NN-FW is a modular control unit manufactured by Bosch Rexroth Indramat for the CDB Control Units series. Installed in a DIAX or IndraDrive automation rack, it coordinates two servo axes in real time and exchanges set-point, status, and diagnostic data with the main drive via fiber-optic SERCOS. By generating reference values and processing feedback, the unit forms the interface between higher-level PLC logic and the power section that actually energizes the motors.

This controller processes motion commands for 2 axes and communicates with drives over the SERCOS II optical ring, allowing synchronous position control at 1 ms cycle times. Internal electronics are supplied from a DC 24 V bus; momentary connection may draw an inrush of 6 A before settling to nominal current. Discrete sensors are accepted on opto-isolated inputs rated at 24 V, 3 mA, while analog feedback devices can be driven by a 5 V, 1 mA output for trim or test purposes. SSI absolute encoder emulation lets the drive present digital position words to external masters without additional converter hardware.

A dedicated evaluation section handles secondary encoder signals: its analog-to-digital converter works at 12-bit resolution, the cutoff frequency reaches 500 kHz, and the input impedance is 120 Ω so line loading stays predictable. The conditioning stage is powered from an 11.6 V rail that can deliver 500 mA to external transducers, and accepted pulse widths extend down to 60 ms for edge-triggered capture. High-speed TTL probes can be sampled up to 400 kHz, enabling direct period measurement of auxiliary tachometers. Form-C contacts on the board switch field devices at 24 VDC, 1 A, and the integrated safety channel applies the certified Safe Torque Off function, removing drive energy without delaying the fieldbus cycle.