Product Description:

The CDB02.1B-ET-EC-EC-EC-S4-S4-EM-NN-FW is a dual-axis control unit produced by Bosch Rexroth Indramat within the CDB Control Units series. It plugs into IndraDrive power sections and handles motion commands, encoder feedback, and drive-integrated safety. By coordinating fieldbus traffic and local I/O, the unit serves as the logical core of a servo system, enabling precise positioning, speed regulation, and safe torque shutdown inside factory automation lines. Its dual-axis format allows one control section to supervise two coordinated motor channels in a compact drive assembly.

Electrical consumption is limited to 23 W, so heat dissipation and cabinet power budgeting remain moderate. All logic and I/O electronics are supplied from a 24 V DC line, simplifying common-bus installation across multiple drives. Network connectivity is provided through a Multi-Ethernet interface that supports several industrial Ethernet protocols without extra option cards. The first encoder supply delivers 500 mA at 12 V, allowing absolute encoders with integrated electronics to be powered directly from the unit. Command and status signals reach the controller through 14 digital inputs, which can be parameterized for limit switches, homing sensors, or user interlocks. This arrangement lets the unit exchange network data and discrete machine signals without requiring separate interface hardware for basic control tasks.

Functional safety for each axis is implemented with S4 Safe Motion, permitting safe stop, safe limited speed, and safe direction functions without external relays. Position feedback flexibility is achieved through a Multi-Encoder Interface on both drive axes and on the third expansion channel, letting the system accept Hiperface, EnDat, or resolver signals as needed. For analog process variables, there are 2 analog inputs and a matching pair of outputs, supporting load-cell scaling or torque reference injection. A sixth communication slot provides Encoder Emulation, so legacy CNCs can receive simulated quadrature or incremental signals even while the actual motor uses a serial encoder protocol. This combination helps newer feedback devices operate alongside older supervisory equipment that still expects conventional encoder-style signals.