Product Description:

The EEA-EDC-436-A3-14 power amplifier card is produced by Vickers within the EEA-PAM Power Amplifiers series. It mounts in a 3U rack and interfaces with hydraulic pump control loops, converting low-level electronic commands into current-modulated solenoid drive signals that set displacement on variable volume units. In industrial automation systems it serves as the intermediary between PLC analog outputs and proportional valve or pump actuators, allowing repeatable pressure and flow regulation.

Mechanical integration follows the Eurocard 3U (IEC 297) format, so the card slides directly into standard cages without custom brackets. Electrical mating is through a DIN 41612 F48 male backplane connector that carries supply, command, and feedback pins in a single line. The solenoid winding is energized by a PWM coil drive; this switching technique minimizes heat while preserving linear force across the stroke. For stable operation the board draws a nominal supply of 24 V DC; internal regulators and filtering keep the output stages clean even when the plant bus fluctuates. Total consumption does not exceed 40 W, making the module suitable for cabinets with limited dissipation capability.

For auxiliary circuitry a +15 V rail is provided on the connector and can source 50 mA max to external sensors or command potentiometers. Control logic becomes active only when the enable line receives 24 V DC; if the bus falls to the protection threshold of 19 V DC the undervoltage circuit disables output stages to prevent partial coil energization. When paired with the PVH131 axial-piston pump, the amplifier scales its current loop to match the pump’s electro-hydraulic stroking element. This tight match, delivered by Vickers across the series, lets maintenance staff swap cards without recalibration in identical pump bays.