Product Description:

The CDB01.1C-PB-NNN-NNN-NNN-NN-S-NN-FW is a compact control unit from Bosch Rexroth Indramat's CDB Control Units series. It is intended for drive systems that require centralized coordination of two motion axes and integrates both analog and fieldbus interfaces to link the drive with higher-level PLCs. Within an automation cell, this module processes sensor feedback, generates command values, and forwards them to the attached power section so that position, velocity, and torque loops can be closed in real time. Its role is to coordinate signal exchange between the machine controller and the connected drive hardware during normal operation.

This unit offers one analog input with an impedance of 160 kΩ, and that high resistance minimizes loading on external transducers. The incoming voltage is digitized with a resolution of 1.23 mV/inc, allowing fine gain adjustments when low-level feedback devices are used. Two analog outputs are present, each designed for loads down to 5 kΩ, and that loading keeps the output stages within their linear region. Each output can step in increments of 19.5 mV/inc, which supports precise analog speed or torque commands. For discrete control, four digital channels can sink or source up to 0.5 A per point, enabling direct actuation of relays or indicator lamps without external drivers.

During power-up, the controller draws an inrush of 6 A for 60 ms, so upstream supplies must tolerate that brief peak. Cyclic communication with the master PLC is handled over 115 kBaud RS485 telegrams on the integrated PROFIBUS interface, and the physical connection is made through a D-Sub 9-pin female receptacle. Two independent drive channels can be parameterized, and each can stream up to 2 position setpoints per control cycle through the serial RS232 maintenance port. All logic and interface circuitry together consume 9 W during steady-state operation, which helps simplify cabinet thermal management and supports compact control cabinet layouts.