The EEA-PAM-535-A-20 Series was specifically designed for automation fluid control settings that needed a small control card capable of regulating proportional valves. The A-20 fits the bill for controlling fluid flow and capacitance in valves. The A-20 series has 4 potentiometers, 2 of which are deadband compensators and 2 gain/flow controls. The entire CNC cut faceplate is integrated with LED indicators for all important communication signals and monitoring features. These amplifier cards are very easy to install and maintain for error-free operation. Eaton Vickers is known for being an overall top notch company when it comes to fluid control and quality automation parts.