VT-VRPA1-100-10

The Bosch Rexroth Indramat VT-VRPA1-100-10 is a high-performance module in the VT-VRPA Electric Amplifiers series designed to drive pilot-operated servo solenoid valves (4WRL 3X) in demanding industrial automation applications. This amplifier delivers a peak current of 73A and supports a voltage range of 24V DC to 48V DC, ensuring powerful actuation of NG 6 pilot valves. With natural convection cooling and an overall power consumption of 37W, the VT-VRPA1-100-10 provides reliable and efficient modulation of servo valves for precise fluid control.

In terms of technical specifications, the VT-VRPA1-100-10 features a continuous current rating of 40A and handles rectified AC voltages from 21V to 28V via single-phase full-wave rectification. The feedback system employs an incremental encoder with Hall sensors for accurate position monitoring, while a differential amplifier with 100 kΩ input resistance accepts ±10V return signals from a potentiometer or external source. The amplifier also includes an external voltage-controlled ramp functionality, configurable through differential inputs and deactivatable when not required. Communication is available over RS232 and RS485 interfaces, enabling integration into modern control networks.

Constructed in a Eurocard format (100 x 160 x ~35 mm) and weighing 3.5 kg, the VT-VRPA1-100-10 meets IP20 protection standards, safeguarding internal electronics against solid contaminants. Operating across temperatures from 0°C to +70°C (storage down to –20°C), it is engineered for durability and long-term stability. The on-board clocked current regulator with short-circuit protection, open-circuit detection, and PID closed-loop control enhances safety and responsiveness. By combining high current capacity, precise feedback, and robust protection features, this amplifier optimizes valve control efficiency and reliability in industrial applications.