Product Description:

The VT-MSPA2-200-1X-V0-0 is an electronic amplifier card manufactured by Bosch Rexroth Indramat for proportional-hydraulic control within the VT-MSPA Drives series. Mounted in a cabinet near the machine manifold, the board converts low-level command voltages from a PLC into regulated coil current for directional or pressure valves. By shaping the solenoid waveform and eliminating the need for discrete transistor stages, it helps streamline motion loops in presses, molding machines, and test stands where repeatable hydraulic performance is required.

The card operates from 18 to 35 VDC, with a nominal level of 24 VDC supplied through cabinet wiring. Under worst-case demand, it draws up to 1 A, and total internal losses are limited to 24 VA, keeping panel heat generation modest. A switching oscillator running at 240 Hz modulates the output stage; this frequency lies above the natural resonance of most industrial valves and minimizes audible noise. The voltage input channel must see at least 50 kΩ of command resistance to enable regulation, while the release threshold is 100 kΩ to prevent unintended energizing. Current feedback is shaped by ramp generators that can extend transitions to 5 s, and the amplifier caps individual step changes at 50%, which helps improve cylinder stability. Continuous duty is permitted for ambient temperatures up to 50 °C.

Field connections accept wires up to 2.5 mm², and the power stage can source a regulated 1000 mA to the coil without derating. The module clips onto a TH 35-7.5 DIN rail and carries an IP20 enclosure rating, so it relies on the control cabinet for protection against contact and surrounding conditions. With a mass of 0.14 kg, the unit is light enough for high-density mounting and still provides a stable mechanical seat that helps dissipate heat when the supply approaches the 35 V ceiling.