Product Description:

The EEA-PAM-520-A-12 is a plug-in power amplifier card manufactured by Vickers and supplied in the EEA-PAM Power Amplifiers series. It translates low-level command voltages from motion controllers into controlled coil current for proportional hydraulic valves, establishing precise spool positioning in presses, injection machines, and material-handling equipment. By performing this signal scaling inside a standardized rack, the module allows drive cabinets to house multiple identical channels without extra field wiring. The plug-in format also keeps signal and power connections inside the rack, which helps maintain orderly cabinet wiring and consistent module placement.

With a profile height of 40 mm, a length of 190 mm, and a width of 130 mm, the board occupies a single slot while leaving adequate airflow for neighboring cards. Its light mass of 0.30 kg keeps cantilever forces low on the back-plane connectors, which reduces vibration-related solder fatigue during continuous duty. The PCB edge keying, test points, and pin numbering match earlier PAM layouts used in legacy racks. This preserves alignment with established rack interfaces.

Functionally, the unit is classified as a Basic Power Amp, delivering open-loop current based on command voltage rather than onboard feedback circuitry. It uses a Standard Rack Mount edge connector that mates directly with the system back-plane, providing both power rails and reference signals without additional harnesses. Output stages are pre-configured for proportional valve families KD/TG4V-3...H7-2*; KD/TG4V-5...H*-3*, allowing one card type to drive several flow ratings across different manifolds. Where high-response Valvistor pilots are installed, the amplifier supports them; this capability is identified as Valvistor use supported.