Product Description:

The EEA-PAM-571-A-33 plug-in card is a power amplifier manufactured by Vickers for the EEA-PAM Power Amplifiers series. It conditions analog command signals and drives proportional solenoids in hydraulic valves, allowing automated machinery to regulate flow or pressure with closed-loop accuracy. By converting low-level control inputs into controlled coil current, the module links PLCs and motion controllers to fluid-power actuators within industrial automation systems.

The board operates from a nominal supply of 24 VDC and its internal circuitry draws up to 50 W under full load. A current-mode input path presents 100 Ohm impedance, simplifying the use of 0–20 mA or 4–20 mA command sources without excessive voltage burden. The separate enable line is high-impedance at 22 kOhm, so logic outputs can toggle the drive state with minimal loading. For the output stage, a peak of 2.9 A is available to energize a valve solenoid, giving the controller latitude for fast magnet force development while still staying within rated thermal limits.

Complementary interfaces finalize integrability. When the voltage-mode channel is preferred, the amplifier offers 47 kOhm input impedance to suit ±10 V references generated by motion cards; those references are reproduced locally as +10 V and −10 V outputs for sensor excitation. The card sinks 1.1 A at a zero-volt command to maintain valve bias, and it also supplies a dedicated ±15 V rail for an LVDT position transducer. Mechanical data aid panel layout: overall dimensions are 7.550 in × 1.590 in with a height of 5.060 in, and the assembly weighs 330 g. Reverse-polarity protection on the supply header prevents damage from wiring errors, completing the electrical safeguards required for field installation.