Product Description:

The EEA-PAM-535-A-33 power amplifier card is produced by Vickers as part of the EEA-PAM Power Amplifiers series. Designed for hydraulic proportional valves, the card converts low-level command signals into regulated coil current so that solenoid force tracks electronic references in closed-loop industrial automation systems. It mounts in a control rack and interfaces with system controllers to modulate flow or pressure in response to analog voltage or current commands.

The board is energized from a nominal supply of 24 VDC, while its internal electronics derive a stabilized control rail of ±15 V to power the signal stages. It will accept a full-scale voltage command of ±10 V through a 47 kΩ input path or, alternatively, a full-scale current command of ±20 mA that sees 100 Ω input impedance; choosing between them lets the designer match PLC output types without external converters. A factory gain of 10 %/V means every volt of reference alters valve spool position by ten percent of stroke, establishing predictable hydraulic response. At zero command the card draws 1.7 A, and the built-in reference source supplies an unmodulated ±10 V should an external setpoint be unavailable. Drive enable and ramp enable terminals each load the control circuit with 22 kΩ, while the monitor point is buffered to 10 kΩ so test instruments do not disturb the loop.

When active, the amplifier can deliver up to 3.2 A of coil current, a ceiling selected to suit Vickers proportional solenoids without overheating. Overall energy draw is limited to 50 W, so shared supply rails are not overburdened when several cards operate in parallel. Service personnel handle it easily because the module weighs only 330 g, and it slides into a backplane that follows the DIN 41612 connector specification for quick interchangeability. Those hardware attributes complement the signal characteristics outlined earlier, completing the amplifier’s role as a compact interface between electrical control systems and hydraulic actuation.