Product Description:

The VT-HNC100-1-30/P-I-00/000 axis controller is produced by Bosch Rexroth Indramat for the VT-HNC Digital Axis Controllers series. Designed for one hydraulic axis, the module converts position feedback and command signals into proportional valve current and voltage signals, forming the closed-loop core of electrohydraulic motion systems in presses, testing rigs, and machine tools. It fits inside a cabinet rack, where its IP20-rated electronics remain protected from accidental contact while allowing access for wiring and diagnostics.

The controller provides two analog output channels, allowing a drive and a pressure valve to be modulated independently from the same board. Current feedback enters through two differential inputs with a resolution of 5 μA, allowing precise monitoring of servo-valve coil current. When sourcing current, the outputs can drive loads up to 500 Ω without losing linearity, making them compatible with high-impedance proportional amplifiers. In addition to analog processing, the card integrates 11 digital I/O points that handle limit switches, valve enables, or fault relays under deterministic control. Motion feedback from incremental encoders is captured by a counter stage with an input limit of 250 kHz, enabling the board to track fast cylinder strokes without missing signal edges.

A 32-bit PowerPC CPU executes the numerical control algorithms and processes setpoints, loop gains, and diagnostic tasks in real time. Voltage sensing is divided between two inputs with an input resistance of 200 kΩ, minimizing the load on pressure transducers while rejecting noise through differential conversion. The voltage inputs process signals in 5 mV increments. Corresponding voltage outputs operate in increments of 1.25 mV, supporting precise command profiles for servo amplifiers that use voltage reference mode. The electronics weigh 585 g, so panel mounting imposes little stress on the supporting rails and limits the added load in mobile machinery enclosures.