Product Description:

The VT-VSPA1K-1-1X- SO43A-560-1 is a single-slot electronic card from Bosch Rexroth Indramat that belongs to the VT-VSPA Proportional Amplifiers series. Installed in a Eurocard rack, the module converts low-level command signals into a controlled output current for proportional valves so that hydraulic actuators can follow analog references with repeatable accuracy. By matching the demanded spool position to the drive current, the card forms the interface between the machine PLC and the valve coil in closed-loop or open-loop hydraulic motion tasks.

Physically, the card follows the Eurocard DIN 41494 format with dimensions of 100 x 160 mm, letting it slide into standard 3U subracks. Field wiring is landed on a 16-pole terminal strip, so supply, command, and spool-feedback lines are separated from back-plane conductors. The power stage accepts a nominal 24 VDC feed and remains functional over 22–35 V, drawing up to 50 VA when the connected valve reaches full stroke. For voltage command inputs, the circuitry presents 100 kΩ of impedance, isolating the upstream controller and minimizing loading effects on analog output cards. A differential command of up to 10 V can be applied without clipping.

On the output side, the driver delivers up to 1.8 A of coil current, a limit that protects typical 560 mA or 1 A proportional valves from thermal overload. Internally, a precision reference source provides ±9 V ±1 %, which is buffered to create command or feedback voltages; when current-mode control is preferred, the card presents a 100 Ω input resistance for the mA set-point circuit. The operating temperature range is 0 to 50 °C, and the storage temperature range is –25 to 85 °C, so cabinets can be powered down in unconditioned facilities without damage. The module supports either voltage or current reference signals for proportional valve control in hydraulic systems.