Product Description:

The CDB01.1C-S3-ENS-EN2-NNN-ENS-S2-S-NN-FW control unit belongs to the CDB Control Units series from Bosch Rexroth Indramat. It is designed for installation in servo drive racks where it supervises two motion channels used in industrial automation cells. By combining fieldbus communication, encoder evaluation, and internal safety monitoring, the device supports coordinated positioning and velocity control for multi-axis machinery. This card is intended for OEM equipment that requires compact drive intelligence at the machine level.

On the drive side, the unit supports 2 independent axes, which indicates how many motors can be commanded from a single board. Command and diagnostic traffic move over SERCOS III, providing deterministic real-time communication between the control unit and external controllers. During idle operation, the electronics draw a base power of 9 W, allowing auxiliary supplies to be sized accurately. At startup, the module can demand up to 6 A of inrush current, so the input protection must tolerate that surge. The En2 encoder interface supplies 5.0 V at 350 mA and expects a return load of 35 ohms, providing adequate headroom for high-resolution feedback sensors.

Network connectivity is handled through 100Base-TX signaling on an 8-pin RJ-45 port, giving the device direct access to Ethernet-based factory networks. The integrated Safe Motion package supports functional safety requirements without requiring additional relays or monitoring hardware. The secondary ENS encoder channel offers a cutoff frequency of 500 kHz for sinusoidal inputs, with an input resistance of 120 ohms, and it delivers 11.6 V at 500 mA to the sensor. For single-ended encoders, the same channel accepts TTL edges up to 400 kHz, which helps maintain low latency during high-speed moves. The startup surge can last up to 60 ms, so supply capacitors and circuit breakers must be sized for that duration.