Product Description:

The EEA-PAM-533-A-32 is a plug-in power amplifier card produced by Vickers for the EEA-PAM Power Amplifiers series. Designed for closed-loop control of proportional solenoid valves, the unit translates standardized current or voltage command signals from a motion controller into a precisely regulated coil current. By occupying a single slot in a hydraulic power-supply rack, it streamlines valve-drive tasks in presses, injection-molding machines, and mobile equipment where consistent hydraulic positioning and force regulation are essential.

To operate, the amplifier draws a nominal supply of 24 V DC; at this voltage its internal switching network can deliver up to 50 W to the valve coil. The current loop is limited electronically to 2.7 A, preventing thermal overload of standard Vickers proportional solenoids. Auxiliary electronics are powered by stabilized rails of ±15 V, available on the front test pins at up to 50 mA for external sensors or potentiometers. With a mass of 330 g, the card adds minimal load to back-planes while still carrying local heatsinking for continuous duty.

The board plugs through a DIN 41612 F48 edge connector that routes command, enable, and monitor lines to the host rack. Voltage commands enter through a 47 kΩ input path and are accepted over a ±10 V span, while current mode control is available through a 100 Ω channel that accepts ±20 mA signals. An enable gate with 22 kΩ impedance activates the drive, and the built-in command monitor presents 10 kΩ impedance so PLC analog cards can read back the setpoint without loading it. Stroke feedback is provided as a ±10 V output that is factory scaled to represent the full valve stroke, and a dedicated ±10 V, 5 mA reference is available for external potentiometers.

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