Description
Rexroth VT-VACAP-500-20V0 0811405157
Technical Specifications: Part number: 0811405157 Power supply: 24VDC Input command signal: ±10V Output: Regulated current for proportional valve solenoid Dither: Adjustable dither amplitude and frequency Ramp time: Configurable rising and falling ramp Operating temperature: 0℃ to +55℃ Protection class: IP20 Mounting: Eurocard plug-in rack card
Functional Features: Convert analog voltage command signal to stable drive current for proportional valve solenoid. Adjustable dither signal to reduce valve spool friction and improve response linearity. Configurable signal ramp to limit valve opening speed and prevent hydraulic shock. Adjustable gain and offset for valve characteristic matching. Wire break and coil fault monitoring for proportional valve circuit. LED indicators for power supply and fault status. Relay output for fault alarm signal transmission.
Application Scenarios: Hydraulic press control, die casting machine hydraulic system, hydraulic bending machine, plastic injection molding machine hydraulic axis, material fatigue test bench, construction machinery hydraulic test rig.
Performance Parameters: High stability constant current output for valve solenoid. Low signal drift under temperature variation. Fast fault detection for valve coil open circuit. Smooth signal transition controlled by ramp function.
Material Composition: FR4 industrial printed circuit board. Operational amplifier and power drive components. Adjustable potentiometers for gain and offset setting. Fault detection circuit components. Flame retardant plastic front panel. Gold-plated edge connector for rack backplane. Screw terminal block for command input and valve wiring.
Structural Features: Eurocard standard plug-in amplifier board. Front panel equipped with status LED and adjustment potentiometers. Edge connector for rack power supply and auxiliary signals. Front screw terminals for command input and proportional valve connection. Internal circuit partition between low level command input and power drive output.
Working Principle: 24VDC power energizes the amplifier circuit. ±10V command signal from host controller enters the input terminal. The circuit adjusts signal gain, offset and applies ramp limit, then adds dither signal. Power drive stage converts processed voltage signal into constant current to energize proportional valve solenoid. The proportional valve spool position changes with solenoid current, regulating hydraulic flow and pressure. Onboard monitoring circuit detects coil open circuit or wiring break and triggers fault indication.
Installation Requirements: Plug the amplifier card into Rexroth standard control rack slot. Use shielded twisted cable for command signal and proportional valve wiring. Separate analog signal wiring from high power cables. Tighten terminal screws to specified torque. Install within IP20 electrical cabinet. Complete protective earth connection for rack.
Usage Notes: Adjust gain, offset and dither parameters during commissioning to match valve performance. Verify wiring polarity of proportional valve solenoid. Power off rack before removing or inserting amplifier card. Check fault LED status after power on. Do not exceed maximum rated output current of the card.
