Product Description:

The EEA-PAM-581-A-32 is a plug-in power amplifier card produced by Vickers within the EEA-PAM Power Amplifiers series. Installed in a DIN 41612 backplane, the card conditions command signals and supplies drive current for electro-hydraulic proportional valves used in motion and pressure control loops on industrial machinery.

The module operates from a nominal bus of 24 VDC and draws up to 50 W, a level sized to energize the onboard reference generators, output stages, and feedback circuitry. A voltage input path presents 47 kΩ of impedance so that external controllers can deliver command signals without significant loading, while the current input path is fixed at 100 Ω to support standard 4-20 mA sources. Internally, the analog ramp generator can slew the output in as little as 50 ms, allowing quick yet controlled spool movement in the associated valve. Digital command lines are isolated at 22 kΩ, and monitor jacks offer 10 kΩ of impedance to minimize probe influence during diagnostics. Full-stroke feedback is available as ±10 V for direct observation of actuator position, and the reference network maintains ±1 % accuracy to keep closed-loop offsets small.

The card furnishes a regulated auxiliary rail of ±15 V, 50 mA Max for external signal conditioning, and an undervoltage circuit forces shutdown when the supply falls below <18 VDC to prevent erratic valve behavior. Physical depth is limited to 175.24 mm, while the 128.4 mm height and 100 mm width allow dense packing in standard 19-inch sub-racks. A separate reference output of ±10 V, 5 mA Max is provided for remote set-point generation or calibration tasks. Together, these electrical, protective, and mechanical characteristics support consistent valve actuation across a broad range of hydraulic automation platforms.