Product Description:

The VT-HNC100-1-1X-260 is a digital axis controller produced by Bosch Rexroth Indramat within the VT-HNC Digital Axis Controllers series. It is intended to manage closed-loop motion on hydraulic machinery by converting analog or digital command variables into proportional valve currents and feedback-based corrections. Through internal signal processing, the unit coordinates position, velocity, and pressure targets so a single hydraulic cylinder can follow programmed trajectories in presses, metal-forming stations, or test rigs.

This model controls 1 hydraulic axis, so its internal resources are allocated for a single motion channel. The unit provides 4 current input channels as differential analog inputs, and each channel presents a precise 100 Ω input resistance to the connected device to help limit loading effects. The converter resolves those input signals down to 5 µA, allowing small command changes to be recognized by the control loop. Two current outputs drive proportional valves, while four voltage inputs and four voltage outputs handle transducer feedback and command values. The voltage output stage steps at 1.25 mV, so command references can be trimmed in fine increments. Additional analog inputs have more than 10 MΩ of impedance, and the voltage inputs are measured to 5 mV with a 200 kΩ front-end resistor network for standard ±10 V sensors.

An output ripple of ±60 mV is the peak-to-peak noise superimposed on the commanded voltage, which is low enough to avoid dither in most servo valves. Program code is retained in an EPROM of 8 KB, while user parameters are stored in a flash array of 1 MB; fast data buffering is handled by 256 KB of RAM. All tasks are scheduled by the 16/32-bit MC68376 processor, so axis calculations, communication, and diagnostics run deterministically within the 8 W power budget.