VT 3000 analog amplifier cards are Eurocard-format control electronics for hydraulic systems that convert a command voltage into a proportional solenoid current to operate proportional directional valves.
They run from a 24 VDC supply and include internal voltage stabilization to keep performance consistent during normal supply variation. The command section supports a differential 0–10 V interface for PLC/computer control and provides multiple selectable internal command setpoints that can be switched via onboard relays, with front LEDs indicating the active selection. A built-in ramp generator smooths acceleration and deceleration with selectable ramp-time ranges, and a function generator compensates valve deadband to allow smooth crossover and rapid, stable reversals. The output stage uses PWM with a dither effect to reduce hysteresis and is designed to drive proportional solenoids over an approximately 20–800 mA current range within the specified electrical limits and ambient operating range.
