Description
The Rexroth VT-VPRAS 1-527-10/V0 is a specialized electronic control board designed for the precise command and regulation of hydraulic proportional valves. This board functions as a signal amplifier and controller, converting standard command values (voltage or current) into the high-current pulse-width modulated (PWM) signals required to drive valve solenoids. It features integrated closed-loop control to ensure high repeatability and dynamic response in hydraulic systems.
- System Series: Rexroth VT-VPRAS
- Command Value Input: 0 to ±10V or 4–20mA (Configurable)
- Operating Voltage: 24V DC (+18V to +35V)
- Output Current: Optimized for proportional solenoids (up to 2.5A)
- Control Type: Closed-loop position or pressure control
- Dither Frequency: Adjustable to reduce friction and hysteresis in the valve spool
- Ramp Generator: Integrated adjustable ramps for acceleration and deceleration control
Product Datasheet
| Feature | Specification |
|---|---|
| Model | Rexroth VT-VPRAS 1-527-10/V0 |
| Device Type | Proportional Valve Amplifier Board |
| Dimensions | 170 x 100 x 40 mm |
| Weight | 0.28 kg |
| Country of Origin | Germany |
| Mounting | Eurocard format / Plug-in card |
| Protection | Short-circuit and reverse polarity protection |
Application Fields
This electronic board is used extensively in industrial hydraulic applications requiring high precision:
- Plastic Injection Molding: Controlling the speed and pressure of the injection stroke.
- Metal Forming Presses: Managing the synchronization of multiple hydraulic cylinders.
- Machine Tools: Precise positioning of hydraulic axes in milling or grinding machines.
- Renewable Energy: Pitch control systems for large-scale wind turbines and hydroelectric governors.
Product Instructions
- Installation: Insert the VT-VPRAS card into a compatible Eurocard rack or 19-inch sub-rack. Ensure the guide rails are aligned and the multi-pin connector is fully seated.
- Wiring: Connect the command signal leads to the specified input pins. Connect the valve solenoid leads to the output power stage pins, using twisted-pair shielded cables to minimize EMI.
- Zero Point Adjustment: With a zero command signal, use the onboard potentiometer to adjust the valve spool to its neutral or offset position.
- Gain Setting: Adjust the “Gain” or “Amplitude” potentiometer to match the full-scale command signal with the maximum desired valve opening.
- Ramp Configuration: Set the ramp-up and ramp-down times to ensure smooth transitions and prevent hydraulic shock (water hammer) in the piping system.
Q&A – Common Questions
Q1: What does the “10” in the model number signify? A1: In Rexroth nomenclature, the “10” typically refers to the Component Series. Boards within the same series are generally interchangeable, while changing series may require checking pin-out compatibility.
Q2: Can this board drive two solenoids simultaneously? A2: The VT-VPRAS 1-527-10/V0 is typically a single-channel amplifier designed for one proportional solenoid (often for directional or pressure valves). For double-solenoid valves, a dual-channel amplifier or two boards may be required.
Q3: How do I know if the board is faulty? A3: Check the onboard status LEDs. If the “Power” LED is off, check the 24V supply. If the “Error” LED is lit, it often indicates a short circuit in the solenoid wiring or a broken wire in the feedback loop.
Related Product Recommendations
- Rexroth VT-VRPA1-151-1X/V0 | Analog Amplifier Board
- Rexroth VT-VSPA2-1-2X/V0 | Proportional Valve Controller
- Rexroth VT-3000-3X | Analog Amplifier for Proportional Valves
- Rexroth VT-HNC100-1-2X | Digital Axis Control Board
- Rexroth VT-11011-1X | Power Supply for Amplifier Boards
