Product Description:

The EEA-PAM-513-B-32 power amplifier card is produced by Vickers within the EEA-PAM Power Amplifiers series. Designed to mount in a standard Eurocard rack, it conditions low-level control signals and drives proportional or servo-controlled hydraulic valves in automated machinery. By converting voltage or current commands from a PLC into accurate coil current, the board helps regulate fluid flow and pressure loops, making it a core interface between electronic control systems and hydraulic actuators on factory equipment.

The board operates from a 24 V DC supply that feeds its internal regulators and reference sources. A dedicated 10 V source rated at 10 mA provides excitation for external potentiometers, while the built-in reference output delivers ±10 V with ±1 % accuracy at 5 mA and limits ripple to less than 20 mV. Command processing accepts a ±10 V voltage signal through a 47 kΩ input network or a ±20 mA current loop through a 100 Ω shunt, giving the user flexible interface choices. Two independently adjustable ramp functions shape the rise and fall of the drive signal; the associated ramp input presents 10 kΩ impedance to the control source. All field and test points reach the rack via a DIN 41612 F48 male connector, allowing quick card replacement without rewiring.

Physically the card occupies a 3U slot and is secured with M2.5 × 11 screws at the front panel. It sources +15 V for an LVDT position sensor and accepts 10 mA logic inputs for enable or fault functions. Temperature stability is high; drift remains below 1 mV/°C, ensuring repeatable valve currents across the cabinet’s full ambient range. The design completes the signal chain by combining precise references, low-noise outputs, and defined mechanical interfaces.