Product Description:

The EEA-PAM-568-B-32 is a printed-circuit power amplifier card manufactured by Vickers within the EEA-PAM Power Amplifiers series. Installed in valve driver racks, the card converts low-level command signals into controlled current for proportional solenoids, enabling closed-loop positioning and pressure control in industrial hydraulic actuators.

The board operates from a 24 VDC nominal supply and draws 1.1 A when the command channel is at zero, so cabinet power sizing must cover that standing load. A built-in reference network sources 10 mA of command voltage current that feeds either the b2 (-10 V) or z2 (+10 V) terminals, giving symmetrical references for external electronics. Voltage-mode commands see an input impedance of 47 kΩ, while current-mode entry is presented with 100 Ω; these values set the loading that upstream controllers must drive. When fully driven, the output stage delivers up to 2.9 A to the proportional solenoid connected on pins z26 and z28, matching the needs of Vickers KTG4V or similar valves. All connections route through a DIN 41612 F48 male edge connector, and main-stage LVDT feedback is wired on b14, z22, and b16.

Overall consumption is limited to 50 W, keeping thermal rise within enclosure limits. A ramp generator with 10 kΩ input impedance accepts speed-based command slopes, allowing motion profiles without external filters. For manual tuning, a front-panel potentiometer rated at 5 kΩ and at least 0.25 W ties into the reference outputs, offering local scaling without overstressing the track. Closed-loop position sensing is supported by an LVDT excitation of 15 V, which the transducer uses to generate a feedback signal that stabilizes spool position under dynamic hydraulic loads.