Product Description:

The VT-VPRAP1-540-10/V0/T is an electric amplifier built by Bosch Rexroth Indramat for the VT-VRPA Electric Amplifiers series. It conditions command signals and supplies controlled current to proportional valve magnets, allowing precise flow or pressure regulation in automated hydraulic systems. This supports closed-loop hydraulic control in applications where valve response must follow changing analog commands with stable current delivery.

The module operates from a nominal supply of 24 VDC; under that bus it draws a steady 1.7 A, yielding a typical input requirement of 37 W. Flow reference data are accepted through a differential input with 100 kΩ impedance, and internal scaling can be trimmed through the onboard signal potentiometer set at 10 kΩ. These values mean the card can be driven from standard control cabinets, while the high input resistance minimizes loading on upstream analog controllers. The selectable potentiometer allows minor signal offsets to be corrected without external tools. Because the amplifier must energize proportional coils rapidly, it incorporates a current loop designed to settle within milliseconds, and the indicated consumption figures show the thermal load that must be removed from the rack while also guiding fuse sizing for low-voltage distribution.

An edge-card interface in the form of a DIN 41612-F32 plug connector links the amplifier to the control rack. Output current to the valve solenoid can reach 2.7 A, while the downstream load is held to a maximum apparent power of 40 VA. Supply quality is stabilized by a bank capacitor rated at 4700 µF / 63 VDC, and the control channel tolerates fundamental ripple up to 10 % without degrading regulation. These values provide filtering, transient energy storage, and a defined electrical interface for rack installation.