REXROTH VT-VSPA1-1-11 Proportional Valve Amplifier

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    • Product Code: VT-VSPA1-1-11
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    REXROTH VT-VSPA1-1-11 Proportional Valve Amplifier

    Technical Documentation

    1. Overview

    The REXROTH VT-VSPA1-1-11 is a high-performance proportional valve amplifier designed for precision control in industrial automation applications. This module provides accurate and reliable control of proportional valves, ensuring smooth and precise operation in demanding environments.

    Engineered to meet the stringent demands of modern industrial automation, the VT-VSPA1-1-11 offers unparalleled precision and reliability in motion control applications. It seamlessly integrates with REXROTH's comprehensive range of drives and control systems, enhancing productivity and efficiency.

    REXROTH VT-VSPA1-1-11 Front Panel

    Fig. 1: VT-VSPA1-1-11 Front Panel with Components Labeled

    2. Specifications

    Electrical Specifications

    Operating Voltage +24 VDC ± 40% - 5%
    Input Voltage Stable voltage +9V for setpoint 1
    Input Type Differential input (±10V), configurable as current input (4-20mA or 0-20mA)
    Pilot Current 50mA or 100mA (adjustable)
    Maximum Output Current 800mA or 1600mA (configurable)
    Clock Frequencies 100Hz, 200Hz, 300Hz, or 370Hz (configurable)

    Environmental & Mechanical

    Operating Temperature Range -25°C to +70°C
    Protection Class IP20
    Weight 0.1 kg
    Connection Type 32-pole male multipoint connector and front plate
    Certifications CE, UL, RoHS compliant

    3. Installation Guide

    3.1 Pre-Installation Preparation

    1. Verify that the module model VT-VSPA1-1-11 matches the system requirements.
    2. Inspect the module for any physical damage before installation.
    3. Ensure the installation environment meets the specified temperature and humidity ranges.
    4. Prepare the necessary tools: screwdriver, torque wrench, and wire strippers.
    5. Verify that the power supply is disconnected before starting installation.

    3.2 Mounting Procedure

    1. Hold the controller card by the front panel and remove it from the packaging.
    2. Slide the controller card into the guard rails of the rack without using excessive force.
    3. Snap the edge connector in place by gently pressing on the front panel.
    4. Tighten the two mounting screws on the front panel to secure the module.

    3.3 Electrical Connections

    1. Connect the 24V DC power supply to the appropriate terminals.
    2. Connect the control signal inputs (4-20mA or ±10V) to the signal terminals.
    3. Connect the proportional valve solenoid to the output terminals.
    4. Ensure proper shielding of signal cables to minimize electromagnetic interference.
    5. Double-check all connections against the wiring diagram before applying power.

    WARNING:

    Ensure all power is disconnected before making any electrical connections. Improper wiring can cause equipment damage or personal injury.

    4. Configuration Instructions

    4.1 DIP Switch Settings

    The VT-VSPA1-1-11 features DIP switches for configuration of various operating parameters:

    Switch Function ON Position OFF Position
    S15-S17 Valve type selection Configured for specific valve types Default valve configuration
    S21-S22 Ramp function control Ramp function enabled Ramp function disabled
    S25-S27 Clock frequency selection Sets specific frequency (see manual) Default frequency setting
    BR22 Pilot current adjustment Increases pilot current by 50 or 100mA Default pilot current setting

    4.2 Potentiometer Adjustments

    Potentiometer Function Adjustment Range
    GW Amplitude attenuator 0-100%
    T↑ Ramp time "ramp up" 0-5 seconds
    T↓ Ramp time "ramp down" 0-5 seconds
    ZW/R130 Pilot current adjustment 50-100mA

    4.3 Parameter Configuration

    1. Set the DIP switches according to the valve type and application requirements.
    2. Adjust the GW potentiometer to set the maximum output amplitude (0-100%).
    3. Set the T↑ and T↓ potentiometers to configure the ramp times for the output signal.
    4. Adjust the ZW/R130 potentiometer to set the pilot current (50-100mA).
    5. Verify all settings against the application requirements before commissioning.

    5. Troubleshooting

    5.1 LED Indicator Status

    LED Status Description Action
    H2 (Green) Steady ON Module is powered and operational Normal operation, no action required
    H2 (Green) Flashing Solenoid conductor cable break or short circuit detected Check wiring between amplifier and valve
    H2 (Green) OFF No power or internal fault Check power supply and connections

    5.2 Common Faults and Solutions

    Fault Symptom Possible Cause Solution
    No output signal 1. No power supply
    2. Incorrect wiring
    3. Internal fault    		 1. Check power supply
    2. Verify wiring connections
    3. Contact technical support
    Output signal unstable 1. Loose connections
    2. Electromagnetic interference
    3. Incorrect parameter settings    		 1. Check and tighten connections
    2. Improve cable shielding
    3. Verify parameter settings
    Overcurrent fault 1. Load too large
    2. Short circuit in wiring
    3. Incorrect parameter settings
    4. Mechanical fault in valve    		 1. Check load conditions
    2. Inspect wiring for short circuits
    3. Re-adjust parameters
    4. Check valve operation
    No response to input signal 1. Incorrect input configuration
    2. Input signal out of range
    3. Faulty input circuit    		 1. Verify input configuration
    2. Check input signal levels
    3. Test with known good signal

    5.3 Diagnostic Procedures

    1. Check power supply voltage at the module terminals.
    2. Verify input signal levels with a multimeter.
    3. Inspect all wiring connections for tightness and corrosion.
    4. Check for signs of overheating or damage.
    5. Verify DIP switch settings against application requirements.
    6. Measure output current with a clamp meter.
    7. If problems persist, contact REXROTH technical support with the module serial number and detailed fault description.

    6. Interactive Diagram

    The following diagram shows the internal structure and signal flow of the VT-VSPA1-1-11 proportional valve amplifier:

    VT-VSPA1-1-11 Internal Structure

    Fig. 2: VT-VSPA1-1-11 Internal Structure and Signal Flow

    Component Description

    Differential Input

    Accepts ±10V analog input signals and converts them for processing. Can be configured for 4-20mA current input.

    Summing Device

    Combines multiple input signals for coordinated control of the valve amplifier.

    Amplitude Attenuator

    Adjusts the maximum output signal amplitude using the GW potentiometer (0-100%).

    Ramp Generator

    Controls the rate of change of the output signal using T↑ and T↓ potentiometers (0-5 seconds).

    Characteristic Curve Generator

    Shapes the output signal according to the selected characteristic curve for optimal valve performance.

    Current Controller

    Regulates the output current to maintain precise control of the proportional valve solenoid.

    Power Output Stage

    Provides the necessary power to drive the proportional valve solenoid, up to 1600mA.

    Command Value Monitoring

    Monitors the command signal to ensure it remains within acceptable limits.

    Monitoring Systems

    Continuously monitors system parameters and provides fault detection and indication.

    Signal Flow Simulation

    Click the "Start Simulation" button to visualize the signal flow through the amplifier:

    Simulation stopped

    © 2025 Bosch Rexroth AG. All rights reserved.

    Technical Documentation for VT-VSPA1-1-11 Proportional Valve Amplifier

    Document Revision: 1.0

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