Bosch Rexroth R901439037 VT-MSPA2-21 A5 000 000 Amplifier

Bosch Rexroth's VT-MSPA2-2X/A5/000/000 valve amplifier (R901439037) is a modular analog drive module in the VT-MSPA family, designed for proportional directional control valves without electrical position feedback and intended for assembly on Rexroth valve electronics; it belongs to component series 20...29, with unchanged technical data and connections across the series. The two-solenoid configuration provides two independent drive channels in a single unit, with a voltage-command input (A5) that for two solenoids accepts 0 to ±10 V; a current-command variant is available on other VT-MSPA configurations (F5) for 4 to 20 mA control. The module operates from a 24 V DC supply and uses screw-terminal connections for command inputs, and it carries CE conformity for electromagnetic compatibility (EMC) under 2014/30/EU. Weighing approximately 0.28 kg, this amplifier offers a compact, robust interface between a control system and proportional valves, making it suitable for a broad range of industrial hydraulics and automation applications where reliable valve actuation is required.