VT-VRPA1-100-12/V0/0 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat VT-VRPA1-100-12/V0/0 is part of the VT-VRPA Electric Amplifiers series and has a nominal supply voltage of 24 V DC with a power consumption of 37 W. It supports a maximum solenoid current of 2.7 A and a solenoid load up to 40 VA. The amplifier weighs 0.25 kg and uses a plug connector compliant with DIN 41612-F32.
Internal Product Review
The VT-VRPA1-100-12/V0/0 is a Bosch Rexroth electric amplifier engineered for dependable hydraulic control with a 24 V DC nominal supply. A 2.7 A maximum solenoid current and 40 VA solenoid load capacity support stable valve actuation in demanding circuits. Strong signal conditioning through 100 kΩ setpoint input resistance makes the amplifier a very capable choice for precise control.
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Product Description:
The VT-VRPA1-100-12/V0/0 is a plug-in electric amplifier card produced by Bosch Rexroth Indramat for the VT-VRPA Electric Amplifiers series. The board conditions command and feedback signals so a hydraulic proportional valve receives the correct coil current, allowing pressure or flow to be modulated by a PLC or closed-loop controller. Designed for rack mounting in industrial control cabinets, the module supplies, limits, and monitors solenoid drive current while providing reference voltages for external potentiometers and transducers used in motion and process automation.
During operation, the amplifier is energized from a nominal 24 V DC supply rail and draws a steady 1.5 A of current under a typical load. It can deliver up to 2.7 A to a connected solenoid, and the magnetic load it drives must not exceed 40 VA to preserve linear control of the valve spool. The front panel occupies 7 modular spacings, minimizing the required rack space. The internal circuitry consumes 37 W, a value that helps determine enclosure cooling requirements. Protective logic supplies a 100 mA fault output, while a 20 kΩ pilot feedback resistor closes the current loop around the valve coil. A 4700 µF, 63 V DC smoothing capacitor filters the input rail during step loads and provides additional energy storage.
Command handling is based on a ±10 V setpoint supply that feeds a 10 kΩ onboard potentiometer or an external device connected to a 100 kΩ input path. The available 10 mA potentiometer supply current helps prevent loading errors. A separate ±15 V rail powers position or pressure transducers so the card can implement closed-loop hydraulic control. Field wiring terminates through a DIN 41612-F32 connector that provides a secure connection to standard Eurocard backplanes. The assembly weighs only 0.25 kg, so it places little mechanical stress on the edge guides and permits dense stacking of multiple amplifier channels.
