Bosch Rexroth VT5011S44R1 Proportional Amplifier Module

The Bosch Rexroth VT5011S44R1 Proportional Amplifier Module is a plug‑in amplifier card used with Rexroth Indramat VT 1600 servo hydraulic drives to drive proportional valve coils with amplified control signals. The S44R1 designation identifies the specific variant and revision of the board, and the unit is commonly referenced in repair and spare parts catalogs as a Proportional Amplifier Card or Add‑On PCB within the VT system. In practical use, it receives a command value from the motion controller and converts it into the amplified output required to actuate proportional valves, enabling precise control of hydraulic flow and pressure in demanding automation applications. This module is typically deployed as a maintenance or retrofit component in VT series installations, helping maintain accurate valve actuation and system responsiveness in industrial hydraulics.