PWM current feedback

Hello, I have a problem, I have to control a proportional solenoid PWM with current feedback, can anyone help me? Thank you greetings VL

http://www.ebay.com/itm/New-design-30A-range-Current-Sensor-Module-ACS712-Module-Arduino-module-/181847127383?hash=item2a56eef557:g:~cUAAOSwNSxVLO2D