Product Description:

The CDB01.1C-SE-EN1-EN1-NNN-MA1-L1-S-NN-FW is a plug-in control section produced by Bosch Rexroth Indramat within the CDB Control Units series. Fitted to an IndraDrive power module, it executes axis control algorithms, manages sensor feedback, and exchanges real-time data with plant controllers. In an automation cell, it serves as the coordination point that sequences motion, oversees drive diagnostics, and propagates safety states to the fieldbus.

Internally, the board controls 2 axes, so a single unit can run a gantry or dual-conveyor pair without stacking multiple cards. Its logic section consumes just 9 W, minimizing cabinet heat. Command packets travel on SERCOS II, a fiber-optic loop that guarantees deterministic telegram timing for synchronized interpolation. When mains power is applied, an inrush of 6 A must be supplied, after which the draw falls to steady state. A maintenance port using RS-232 remains active for local setup outside the SERCOS ring. The MA1 extension exposes two 12-bit analog inputs and two 12-bit analog outputs; the inputs present a 1000 kΩ impedance, and the outputs can drive down to 1 kΩ. Safety logic is armed through a 24 V, 3 mA starting-lockout input, and the controller only enables power after a 24 V, 1 A acknowledgment signal is detected on the separate lockout acknowledgment line.

The EN1 feedback interface excites the resolver windings with a carrier of 4 kHz at 18.2 Vpp, then digitizes the returned sine-cosine pair to close position loops in microseconds. Input capture circuitry filters command edges that exceed a maximum width of 60 ms, preventing inadvertent latching of slow or noisy signals. This timing behavior helps the control section reject unstable input transitions during coordinated motion. The dedicated resolver channel supports closed-loop feedback for compatible IndraDrive assemblies.