The VT-VSPA proportional amplifier controls solenoid current to Rexroth proportional valves without LVDT position feedback. Double and single solenoid driver cards have additional features for more flexibility. The user may configure the analog input, extend ramp time, and change setup for pre-defined valve types.
•Differential input (0 to +10 V)
•Current input (4 to 20 mA)
•4 command value call-ups (only in conjunction with option A4)
•Ramp generator with separately adjustable ramp time for “up/down”