Bosch Rexroth VT-VRPA1-50-1X/V0 R900952202

  • Product Name:​ Euro-card format analog amplifier for proportional flow / pressure control valves (FE, FES, DBETR, 2FRE series)
  • Part Number:​ R900952202 (VT-VRPA1-50-1X/…)
  • Product Type:​ Analog electronic amplifier card, European card format 100×160 mm (DIN 41494)
Category:
Description
  • Product Type:​ Analog electronic amplifier card, European card format 100×160 mm (DIN 41494)
  • Function / Working Principle:​ Receives a 0–±10 V or 4–20 mA command signal from a PLC / controller, processes it through a ramp generator and PID position controller, then drives the proportional solenoid coil with a regulated current output. Includes inductive position transducer oscillator/demodulator for valves with electrical position feedback.
  • Key Technical Specs:
    • Supply Voltage:​ 24 V DC (reverse polarity protected)
    • Solenoid Output Current:​ up to ~1.2–2.0 A (valve dependent)
    • Command Input:​ Differential input, switchable 0–+10 V / 0–20 mA / 4–20 mA via jumper
    • Ramp Time:​ Adjustable via front potentiometers; typ. 0.02–5 s or 0.2–50 s (jumper selectable)
    • Internal Supply:​ ±9 V generated internally (max. 25 mA external load)
    • Indicators:​ Green LED = ready for operation; Yellow LED = enable active
    • Connectors:​ 32-pin or 48-pin edge connector
    • Operating Temp.:​ 0 °C to +50 °C (some versions up to +70 °C)
    • Protection:​ Short-circuit protection on output stage, wire-break detection
  • Features:​ Zero-point & gain trim potentiometers, separate up/down ramp adjustment, enable input, “ramp off” input, measurement sockets for command & actual value, plug-in jumpers for valve type configuration.
  • Application:​ Hydraulic press control, injection molding machines, test rigs — anywhere proportional flow/pressure valves require precise closed-loop control.
  • Installation Notes:​ Mount in standard Euro-card rack; ensure proper shield grounding of solenoid cables; set jumpers before power-up per target valve datasheet.
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