Overview

The Rexroth VT-VRRA 1-537-20/V0 is a high-performance analog amplifier designed for reliable control of proportional directional and pressure control valves. This robust module is essential for achieving precise, repeatable hydraulic movement in industrial automation systems. Specifically, it drives valves without electrical position feedback, offering an optimal balance of cost-effectiveness and control accuracy.

The amplifier integrates seamlessly into various hydraulic circuits, improving machine performance and service life. It is engineered to withstand harsh industrial environments, ensuring continuous operation where reliability is critical. Moreover, its proven design reflects decades of Bosch Rexroth expertise in advanced fluid-power control.

Technical Data

This proportional valve amplifier delivers the command signals and control logic required to interface your automation system with the hydraulic valve. Its internal circuitry minimizes electrical noise, ensuring stable and accurate output.

Typical Applications

The VT-VRRA 1-537-20/V0 is used wherever precise hydraulic pressure and flow control are required. Typical applications include:

• Plastic injection molding machines – precise control of mold clamping and injection speed.

• Metal forming equipment – consistent force and speed control in bending, punching, or drawing operations.

• Machine tools and hydraulic power units – adjustable spool positioning and smooth axis motion.

• Systems requiring smooth acceleration/deceleration – independent ramp settings reduce hydraulic shock and extend component life.

This makes the amplifier a versatile, reliable cornerstone in high-end, non-feedback hydraulic control systems.

 Frequently Asked Questions (FAQ)

Q1. What type of proportional valve is the VT-VRRA 1-537-20/V0 designed to control?

A1. It is designed for standard proportional directional and pressure control valves without electrical position feedback (no LVDT).

Q2. Can I adjust the acceleration and deceleration behavior of my hydraulic system?

A2. Yes. The amplifier includes independent potentiometers for up-ramp (acceleration) and down-ramp (deceleration), enabling precise motion-profile tuning.

Q3. How does the amplifier maintain reliable performance in electrically noisy industrial environments?

A3. It uses robust internal filtering and a regulated power supply to deliver clean, stable signals to the solenoids, effectively rejecting electrical interference.

Q4. What is the maximum output current of this amplifier?

A4. The amplifier can deliver up to 800 mA per solenoid, suitable for driving a wide range of proportional valve sizes.