Bosch Rexroth VT-VSPA1-1-1X/ proportional valve amplifier

Bosch Rexroth VT-VSPA1-1-1X/, material number R900033823, is an analog Eurocard amplifier for single-solenoid proportional hydraulic pressure valves without electrical position feedback. It uses a 32-pin DIN 41612 form D connector and a 100 × 160 mm card. The differential input is configurable for 0–10 V, 4–20 mA or 0–20 mA; an additional 0–9 V command input is referenced to M0.

Nominal supply is 24 V DC with the published +40%/−5% tolerance; the instantaneous operating limits are +22 and +35 V. S17 selects the nominal 800 mA or 1600 mA solenoid-current range, each with +20% tolerance, for the corresponding 19.5 Ω or 5.4 Ω coil reference at 20 °C. The current attenuator must be adjusted to the actual valve. Separately adjustable up/down ramps cover 30 ms to approximately 1 s or 5 s according to S14.

The permitted operating temperature is 0–50 °C. Card holder, power supply and valve are separate installation components. The technical reference is RE30111, September 2005, with the Series 1X type and pin-assignment scope stated in its ordering key. The manufacturer photograph is representative of the series.