Product Description:

The EEA-PAM-568-D-30 is a plug-in power amplifier card produced by Vickers for the EEA-PAM Power Amplifiers series. The board occupies a 19-inch rack slot and translates analog commands from a PLC into regulated current tailored for proportional hydraulic valves. By handling signal conditioning and power staging, it serves as an interface between low-voltage control systems and industrial motion actuators. This arrangement lets the control platform issue a low-power reference while the card supplies the valve-driving output needed by the hydraulic stage.

The command interface is designed around a current input that presents 100 Ω of impedance, so the controller driving the card sees a predictable load. A separate voltage input offers 47 kΩ impedance, which minimizes draw when the source is a high-level analog card. Internal circuits are powered from a dedicated +15 V rail that is generated on the board for isolation from noisy bus supplies. The amplifier delivers a symmetrical reference range, and the lower limit is -10 V × 5 mA, allowing bipolar command scaling for reverse valve flow. The output stage is matched to the hydraulic servo valve type KFDG5V-8, so the proportional coils receive the intended peak and steady-state current without added external trimming.

Feed-forward tuning is available through a separate input that sees 6 kΩ impedance, permitting velocity or pressure pre-compensation without overloading the source. Ramp and monitor terminals each carry 10 kΩ of impedance, and the sensor feedback node is buffered at 1 MΩ to avoid burdening high-impedance transducers. This buffering helps preserve signal quality when feedback devices cannot drive heavier electrical loads. A 0.4 kg mass and a DIN 41612 F48 male connector simplify installation in compact enclosures. Positive reference capability to +10 V × 5 mA supports full-scale forward actuation. Reliable service is permitted from 0 °C to 50 °C, and safe storage is permitted from -25 °C to +85 °C.