Product Description:

The VT-HACD-3-2X-P-I-E0-000 is a digital axis controller from Bosch Rexroth Indramat in the VT-HACD Digital Axis Controllers series. Designed for closed-loop hydraulic or electromechanical positioning, it links valves, encoders, and higher-level PLCs to regulate position and speed on a single motion axis inside an automation cell. The board mounts in a 3U Euro-card slot and acts as the interface between field transducers and the machine control network.

Central processing is handled by a 32-bit PowerPC that executes motion algorithms, while field communication occurs over PROFIBUS DP at 12 MBaud. It provides 6 analog inputs and 3 analog outputs, so pressure, velocity, or spool-position signals can be read and precise command voltages or currents can be sent back. The voltage outputs step in 1.25 mV increments, and the current channel granularity is 1.25 µA. Incremental or SSI encoders are accepted, and an incremental line driver can be captured at up to 250 kHz, allowing rapid cylinder movements to be tracked without missing counts. All conversions are synchronized to the processor bus to maintain deterministic cycle times.

Discrete control is covered by 9 switching inputs and eight switching outputs, while the board draws 200 mA from the 24 V DC rack supply. A stabilized reference of +10 V ±25 mV supports external potentiometers, and voltage inputs hold ±0.25% nonlinearity with 5 mV resolution, while current feedback is resolved to 5 µA. For absolute feedback, the SSI port accepts 28-bit words, matching high-resolution linear scales. The analog stage is complemented by the 1.25 µA output resolution that enables fine valve metering during slow creep movements. Startup diagnostics and parameter downloads run automatically across the fieldbus, simplifying startup routines in multi-axis machinery.