Product Description:

The EEA-PAM-532-A-32 is a plug-in power amplifier card manufactured by Vickers within the EEA-PAM Power Amplifiers series. It is intended for hydraulic proportional or servo valve loops where a PLC supplies low-level commands that must be converted into regulated drive currents. By shaping those signals, the card enables precise pressure and flow control in automated presses, plastic machines, and similar equipment.

The module is energized from a nominal bus of 24 VDC, and its internal circuitry dissipates up to 50 W, figures that determine fuse sizing and cabinet ventilation. Local signal processing relies on a dual auxiliary rail of ±15 VDC; that rail is limited to 50 mA and carries a peak-to-peak ripple of 50 mV, so noise exported to sensors stays low. Command inputs can be current-mode or voltage-mode: a current loop sees an impedance of 100 Ω, while a voltage source meets an impedance of 47 kΩ, allowing flexible interface with various controllers. Reference outputs are provided to calibrate field devices; the card sources 5 mA or ±10 V with only 20 mV of ripple, and the reference voltage is held within 1 % for repeatable tuning. Temperature drift is limited to 1 mV / °C, ensuring that offset errors remain minor across typical panel environments.

The drive stage can accept a maximum command of 20 mA or 10 V, giving integrators a clear ceiling when scaling PLC analog ranges. Slew characteristics are adjustable: acceleration can be stretched to a 5 s ramp for gentle motion or compressed to a 50 ms ramp when rapid spool shifts are needed. Those timing limits work in concert with the accuracy and low drift noted above to keep valve position stable during both slow process shifts and fast corrective actions.