VT-VRPA2-1-11/V0/T1

The VT-VRPA2-1-11/V0/T1 by Bosch Rexroth Indramat is a precision-grade analog control amplifier within the VT-VRPA Electric Amplifiers series, engineered specifically for high-performance proportional valve control. This Euro-card format amplifier is optimized for reliable operation in industrial automation settings, compatible with 4WRE 6…-2X proportional directional valves. Featuring a robust input voltage range of 340-528 VAC, the unit delivers stable power and seamless command execution. With a rated current of 10 A and a maximum power output of 5.5 kW, it ensures that demanding applications receive sufficient drive capacity. Equipped with an IP20 protection class, the amplifier is built for secure installation within control cabinets and panel enclosures.

Technically, the VT-VRPA2-1-11/V0/T1 offers a versatile array of control interfaces. It includes four potentiometer inputs (w1 to w4) supporting 0 to ±10V signals with resistance values exceeding 100 kΩ, and a differential voltage input (w5) handling 0 to ±10V at resistance greater than 50 kΩ. The current port (w6) accepts 4 to 20 mA signals against a 100 Ω load, while an external ramp control input accommodates 0 to +10V with a 10 kΩ impedance. Frequency compatibility spans 50/60 Hz line power, and internal power switching operates at a 5 kHz clock frequency, ensuring rapid response and minimized distortion. The single ramp time option T1 provides straightforward adjustment of acceleration and deceleration slopes for critical control tasks.

Operationally, the amplifier’s enable input guarantees safe start-up sequences, commanding ON at 8.5 V to UB and OFF below 6.5 V, preventing unintended valve actuation. The amplifier maintains command and actual value outputs with an accuracy of ±2%, ensuring high-fidelity feedback and closed-loop stability. Thermal management is inherent to the compact Euro-card design, delivering reliable service under continuous loads without derating. The Component Series 1X construction encompasses rugged board-level assemblies fortified against electromagnetic interference, preserving signal integrity in electrically noisy industrial environments. These features combine to reduce commissioning time and streamline maintenance through predictable performance.

Integration of the VT-VRPA2-1-11/V0/T1 into existing automation architectures is facilitated by its standardized Euro-card mounting and clear connector pinouts. It interfaces seamlessly with Bosch Rexroth’s hydraulic proportional valves, PLC analog I/O modules, and industrial fieldbus gateways. Typical applications include hydraulic presses, injection molding machines, mobile equipment controls, and fluid power test benches where precise valve modulation is essential. By leveraging its comprehensive control inputs and robust power stage, the amplifier enhances system efficiency, responsiveness, and long-term operational reliability.