The Rexroth VT-VSPA2-1-11/T1 (Material Number: R900021909) is an analog proportional amplifier card designed for the control of proportional directional valves without electrical position feedback. Built in a standard Eurocard format, this amplifier module processes analog command values and translates them into precise solenoid control currents to ensure smooth, dynamic hydraulic operation.

Engineered and manufactured in Germany, the module features a comprehensive front panel interface equipped with status LEDs (H11, H12), four adjustable command value potentiometers (R1–R4) with corresponding active call-up LED indicators (H1–H4), and an adjustable ramp time potentiometer (t). Front-accessible test sockets allow direct measurement of command values (W 0…±6V) as well as solenoid output currents IA and IB (with a conversion factor of 1 mV = 1 mA) for simplified commissioning, diagnostics, and routine maintenance.