Rexroth VT2000-52

  • Product Name:​ Proportional Valve Amplifier (VT2000 series, 5X generation)
  • Product Introduction:​ Eurocard-type analog amplifier for single proportional solenoid without electrical position feedback; converts command voltage into controlled solenoid current with ramp and dither.
  • Technical Specifications:
    • Supply: 24 VDC (22–35 VDC)
Category:
Description
    • Command input 1: 0 to +9 V (referenced to M0)
    • Command input 2: differential 0 to +10 V (PLC compatible)
    • Output current: up to 800 mA (±10%/−5%), load approx. 19.5 Ω
    • Ramp time: 30 ms to 1 s or 5 s (jumper S1)
    • Dither clock: 100 Hz or 200 Hz (jumper S2)
    • Bias current: 0–300 mA (Zw potentiometer)
    • Connector: 32-pin DIN 41612
  • Functional Features:​ Summed command inputs, adjustable ramp up/down, bias superposition, PWM output stage with dither, short-circuit and thermal protection.
  • Application Scenarios:​ Proportional pressure/flow valves, pilot stages, retrofit of 4X card in hydraulic power units.
  • Structural Features:​ PCB with front panel potentiometers (Gw, Zw), jumpers S1/S2, measuring sockets for command and current.
  • Working Principle:​ Command voltage → attenuation → ramp → bias add → PWM current regulator → solenoid; dither reduces stiction.
  • Installation Requirements:​ Insert into VT3002 card holder; shield command cable one-side grounded; solenoid cable shielded, no freewheeling diode in line.
  • Usage Notes:​ M0 is +9 V above 0 V and not isolated; never tie M0 to 0 V; measure only with high-impedance meter; output stage shuts down silently on overtemperature.
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