Product Description:

The CDB01.1C-S3-ENS-ENS-NNN-NNN-L1-S-NN-FW is a modular control unit developed by Bosch Rexroth Indramat for the CDB Control Units series. Designed for multi-axis automation, the module installs on IndraDrive power sections and handles drive coordination, feedback processing, and network traffic inside a machine cell. In a production line, it acts as the logic and motion interface between higher-level PLCs and the individual servo amplifiers, executing position loops and forwarding safety signals so that connected axes follow the programmed motion profile.

Communication with the drive bus relies on SERCOS III, giving deterministic cycle times over fiber or copper rings. Internally, an analog-digital converter provides 12-bit feedback resolution, which is suitable for fine incremental evaluation of the two ENS encoder channels. At idle, the electronics draw 9 W, which simplifies cabinet thermal design, while motor start-up briefly pulls an inrush of 6 A that must be considered when sizing fuses. Ethernet diagnostics are available through a 100Base-TX interface, and the port is galvanically isolated to protect the control logic from plant-level transients. Input differential lines exhibit 120-ohm impedance, matching standard twisted-pair cabling and minimizing signal reflections.

A maximum of 2 drive axes can be configured, each receiving position data through the twin ENS interfaces and powered by the encoder supply of 11.6 VDC at up to 500 mA shared current. Field wiring terminates on an 8-pin RJ-45 jack for network traffic and on a female D-Sub 9-pin connector dedicated to the safety circuit. That circuit implements a starting lockout and propagates stop commands at a safety signal level of 24 V / 3 mA. When activated, the command chain meets the requirements of Category 0 stopping, meaning power is removed without controlled deceleration. A simple single-line display on the front panel shows node address, error codes, and operating mode.