VT-VRPA1-51-11

The VT-VRPA1-51-11 amplifier from Bosch Rexroth Indramat is part of the high-performance VT-VRPA Electric Amplifiers series designed for precise control of servo solenoid valves. This proportional valve amplifier operates on a nominal 24 V DC operating voltage with a DC supply range of 21–40 V DC and supports rectified AC input of Ueff 21–28 V (single-phase). Engineered to drive 4WRL…M-3X series proportional valves, it delivers up to 1.2 kW rated power at a rated current of 10 A. The unit mounts in standard Eurocard format for 19" rack installation, enabling seamless integration into existing control cabinets. Its compact form factor and 60 Hz frequency compatibility make it ideal for modern industrial automation environments.

Optimized for demanding industrial applications, the VT-VRPA1-51-11 achieves an efficiency of 85% and features robust short-circuit-proof outputs to prevent damage from overloads. Comprehensive protection includes overcurrent protection and undervoltage detection, ensuring sustained operation under fluctuating supply conditions. The amplifier’s diagnostic suite provides open-circuit detection in feedback signal lines and real-time status monitoring via status LEDs: green for power on, yellow for feedback interruptions, and red for input voltage errors. With its precise control characteristics and rapid response, this amplifier maintains stable valve positioning even under dynamic load changes. The combination of advanced protection and diagnostics minimizes downtime and simplifies maintenance in complex mechatronic systems.

Built for reliability and system integration, the VT-VRPA1-51-11 amplifier supports a broad range of industrial automation tasks, from CNC machining to servo-hydraulic applications. Its proportional valve amplifier function ensures smooth and accurate control of hydraulic actuators, reducing mechanical stress and improving process repeatability. The Eurocard mounting design simplifies retrofits and new installations, while the series’ modular architecture allows straightforward expansion of multi-axis configurations. With proven performance in harsh factory environments, this amplifier enhances uptime and contributes to safer, more efficient production lines. Bosch Rexroth Indramat’s commitment to innovation is evident in the VT-VRPA1-51-11’s blend of precision control, robust protection, and diagnostic transparency.