REXROTH VT-VRPA1-50-1X R900952202

Core Technical Performance Parameters

• Supply Voltage: 24 V DC nominal, operating range 21–30 V DC
• Total Power Consumption: Max 30 W
• Max Solenoid Driving Current: 2.2 A continuous
• Input Command Signal Modes (selectable via jumpers):
  1. Voltage: 0–6 V, 0–9 V, 0–10 V
  2. Current: 0–20 mA, 4–20 mA
• LVDT Excitation Frequency: 2.5 kHz ±10% regulated oscillator
• Ramp Time Two Range Switchable:

  Short ramp: 0.02 s – 5 s

  Long ramp: 0.2 s – 50 s

• PID Adjustable Parameters on Front Panel Trim Pots: Zero Offset, Gain Sensitivity, Acceleration Ramp, Braking Ramp
• Fault Signal Output: 24 V DC max 100 mA switch output for system alarm
• Operating Ambient Temperature: 0 °C to +50 °C
• Storage Temperature: -20 °C to +70 °C
• Overall Dimensions: 182 mm Depth × 20 mm Width × 128.4 mm Height
• Net Weight: 0.15 kg
• Connector Standard: 32-pin DIN 41612 Form D male industrial connector

Function & Feature Highlights

1. Full closed-loop PID position control for proportional valve spool position
2. Short-circuit protection for solenoid output and LVDT feedback wiring open-circuit detection
3. Separable internal/external ramp control logic for flexible motion profile programming
4. Regulated ±9 V reference power supply for external position potentiometer (25 mA load capacity)
5. LED status indicators: Power Ready, Feedback Fault, Low Supply Voltage Alarm
6. Plug compatibility with legacy Rexroth VT5011, VT5012, VT5062–VT5066 amplifier modules
7. Isolated measurement test sockets for real-time setpoint and actual position signal reading
8. Enable inhibit digital input for machine safety interlock cut-off

Working Principle

1. The controller receives analog setpoint signal from PLC or motion controller, compared with LVDT spool position feedback signal to generate deviation error value.
2. Internal PID circuit calculates correction output, then drives PWM clocked power stage to output variable current to proportional valve solenoid.
3. LVDT oscillator continuously excites valve position sensor, converts mechanical spool displacement back to analog feedback voltage for closed-loop correction.
4. Ramp timing circuit filters sudden signal jumps to avoid hydraulic shock; fault monitoring circuit continuously scans wiring continuity and supply voltage, triggers digital alarm output upon abnormal status.

Material & Structural Composition

• Main Housing: Flame-retardant black PA66 plastic DIN rail housing, anti-vibration rib structure
• PCB Substrate: FR4 high-temperature fiberglass circuit board with tin-lead free plating
• Power Components: High-frequency MOSFET power switching tubes, sealed film adjustment potentiometers
• Connector Housing: Glass fiber reinforced thermoplastic, gold-plated contact pins for anti-corrosion
• Heat Dissipation: Integrated aluminum alloy heat sink strip on power output zone

Installation Requirements

1. Standard 35 mm top-hat DIN rail vertical cabinet mounting, vertical installation only (horizontal mounting forbidden for heat dissipation)
2. Maintain minimum 20 mm vertical clearance above and below the module for air convection cooling
3. Wiring rule: Power zero line and control zero line must be short bridged when cable distance below 1 m; separate ground wiring for control zero if cable exceeds 1 m length
4. Maximum wiring distance between amplifier and proportional valve LVDT sensor shall not exceed 10 meters with shielded twisted pair cable
5. Shield cable single-end grounding at amplifier cabinet side only, floating ground at valve side to eliminate ground loop interference

Application Scenarios

• CNC machine tool hydraulic servo axes (clamping, feed, spindle tension control)
• Metal forming hydraulic presses (stamping, bending, injection molding machine clamping unit)
• Marine hydraulic valve remote proportional pressure regulation
• Industrial robot hydraulic joint closed-loop control
• Wind turbine hydraulic pitch adjustment systems

Operation & Maintenance Precautions

1. Do not apply over 30 V DC supply voltage, reverse polarity input will permanently damage internal power circuit
2. All jumper configuration changes must be completed under power-off state
3. Avoid installing in cabinet areas with direct oil mist, water splash or corrosive gas; install IP54 sealed cabinet if working in harsh workshop environment
4. Regularly clean dust accumulation on PCB heat sink every 6 months to prevent overheating protection trigger
5. LVDT feedback cable must use dedicated shielded twisted wire; ordinary unshielded cable will cause control oscillation and position drift
6. Ramp time adjustment range must match machine mechanical inertia; overly short ramp will generate hydraulic impact and pipeline vibration