Product Description:

The CDB01.1C-S3-ENS-ENS-ENS-NNN-S2-S-NN-FW is a modular control unit produced by Bosch Rexroth Indramat and supplied within the CDB Control Units series. Installed in Rexroth drive racks, it supervises two servo axes, processes analog feedback, and exchanges deterministic data over real-time networks. In automated machinery, this module provides the closed-loop processing layer that links motion commands from a higher-level PLC to the power stages that energize motors, so position, velocity, and safety functions are executed with consistent timing.

At start-up the unit draws a maximum inrush of 6 A for 60 ms, a short pulse that charges internal capacitors before normal operation. Once powered, its logic section dissipates only 9 W, reducing panel heat load. Each of the two motion channels is updated by a current loop calculated every 125 µs, providing fine torque regulation. Two analog outputs can mirror internal variables or feed external indicators, while the twin-axis architecture economizes cabinet space. The enable (“ENS”) terminals deliver 11.6 VDC at up to 500 mA, supplying sensors and I/O that must remain powered even when the main drive is disabled. Deterministic command exchange is handled through SERCOS III fiber or copper rings, so drive parameters stay synchronized with the controller.

In safety-related segments the module employs Bosch Rexroth Safe Motion technology. The SERCOS telegram length can be reduced to a minimum cycle of 1000 µs, allowing fast status updates without overloading network bandwidth. For interlocked stops, the S2 terminal accepts a control signal of 24 V / 3 mA and routes it to redundant output switching devices rated at 24 V / 0.5 A and a relay path of DC 24 V / 1 A. Diagnostics and service communication use the S3 service port implemented with a RJ45 8-pin plug that follows the IEEE 802.3 Ethernet standard, so ordinary network cables can be used for access.