VT-MSPA1-21/A5/000/000 Bosch Rexroth Indramat
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MPN: R901439034
The Bosch Rexroth Indramat VT-MSPA1-21/A5/000/000 is part of the VT-MSPA Drives series and operates on 24 V DC with an IP20 protection class. It features a maximum solenoid current of 2.7 A and supports up to 12 spring terminals. The housing is made from glass-fiber reinforced polyamide, and the unit weighs 0.14 kg.
Internal Product Review
The VT-MSPA1-21/A5/000/000 is a Bosch Rexroth Indramat VT-MSPA drive module for proportional solenoid control, featuring 24 V DC operation and a 0 to +10 V command value. Start-up in under 1 s and 2.7 A maximum solenoid current give the module a responsive, well-tuned feel in hydraulic control applications. A strong choice for protected panel installations with IP20 protection.
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Product Description:
The VT-MSPA1-21/A5/000/000 is a single-channel proportional amplifier card from the Bosch Rexroth Indramat VT-MSPA Drives series. Mounted in control cabinets alongside hydraulic power units, the board converts low-level command voltages from a PLC into regulated current for one solenoid, enabling precise valve positioning in industrial automation tasks such as pressure or flow regulation. Its compact form and spring terminals simplify installation without requiring changes to the wiring of adjacent modules.
The amplifier operates from a 24 V DC supply, and internal monitoring keeps the circuitry online from a lower limit of 18 V to an upper cutoff of 36 V. Within that range, the board delivers up to 2.7 A of controlled current to the connected solenoid in proportion to an analog command of 0 to +10 V. The input has an impedance of 200 kΩ, minimizing the electrical load placed on upstream controllers. Residual ripple is limited to 2.5 Vpp, which helps prevent unwanted movement or dithering of the valve spool. A 3.15 A time-delay fuse provides inrush and short-circuit protection. The amplifier reaches its ready state in less than one second, allowing operation to resume quickly after the power supply is restored.
Cable runs between the board and valve can extend to 50 m when 1.5 mm² conductors are used, preserving signal integrity without additional boosters. The glass-fiber-reinforced polyamide enclosure has an IP20 rating, so the unit must be installed inside a closed control panel. Twelve spring terminals simplify field wiring and securely clamp the power and feedback conductors. With a mass of 0.14 kg, the unit places minimal stress on its DIN-rail support and remains easy to position within a crowded cabinet. Reliable operation is supported at elevations up to 2000 m above sea level, making the amplifier suitable for installations across a broad range of operating locations.
