VT-VRPA2-2-1X/V0/T5

The VT-VRPA2-2-1X/V0/T5 is an electric amplifier card produced by Bosch Rexroth Indramat within the VT-VRPA Electric Amplifiers series. It is built as a printed circuit board module that conditions external command signals so they can drive proportional hydraulic solenoids in automated machinery. By accepting a voltage reference from a motion controller and shaping it into controlled current, the board serves as an interface between low-level electronics and the mechanical action of valve actuators used in industrial automation.

This model accepts up to four selectable command values from the host control system. The input stage tolerates a symmetrical range of ±10 V, allowing direct connection to common analog controllers. Internal regulators operate from a field-supplied line of 24 VDC, and power conversion on the board generates stable drive current for the load circuits. The card energizes 2 solenoid channels and applies programmable acceleration and deceleration with 5 selectable ramp times. These ramps smooth spool motion and minimize hydraulic shock when flow or pressure setpoints change.

Field wiring terminates on a 48-pin form F connector, which mates with standardized backplane racks used in machine control cabinets. Signal exchange with the controller remains unencoded because the unit relies on analog signaling; this simplifies diagnostic work with standard test instruments. Closed-loop operation is supported through integrated position feedback, so the amplifier can compare actual spool displacement with the commanded value and adjust current accordingly. The board locks into a card holder or a 19-inch rack, allowing multiple amplifiers to be grouped in a dense, accessible stack while maintaining consistent airflow across the components.