EEA-PAM-568-B-30 Vickers
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The Vickers EEA-PAM-568-B-30 is a power amplifier from the EEA-PAM Power Amplifiers series, featuring a nominal supply voltage of 24 VDC and a maximum supply power of 40 watts. It supports a maximum solenoid current of 3.2 amps, an amplifier shut-down voltage of 18 VDC, and an input impedance of 47 kilo-ohms.
Internal Product Review
The EEA-PAM-568-B-30 from Vickers is a power amplifier designed for hydraulic control systems, featuring a nominal supply voltage of 24 V DC and a maximum solenoid current of 3.2 A. With a ramp time adjustable from 50 ms to 5 seconds, it allows for precise control and smooth system operation. This model stands out for its reliable performance and flexibility in demanding industrial applications.
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Product Description:
The EEA-PAM-568-B-30 is a plug-in power amplifier card produced by Vickers for the EEA-PAM Power Amplifiers series. Installed in a 19-inch rack, the module converts low-level command signals into controlled current for a proportional valve solenoid, allowing hydraulic actuators to follow motion profiles generated by a PLC or motion controller. By matching coil drive to electronic references, the card supports closed-loop pressure and flow regulation in industrial automation cells.
The amplifier runs from a nominal supply of 24 V DC, and its onboard power circuit is rated for 40 W, so the backplane must accommodate that thermal load. Command inputs use a high-impedance front end of 47 kΩ, reducing the burden on upstream analog sources. Internally, the card generates a bipolar reference of ±10 V (5 mA), providing symmetrical limits for both valve directions. At the output stage, a peak coil drive of 3.2 A is available, providing sufficient force for most NG06-sized proportional valves. Because unwanted changes in flow can affect machine stability, the design includes a user-programmable ramp generator that shapes current rise and fall.
Protection and timing parameters determine how the board integrates with system safety logic. If the supply drops to 18 V DC, the amplifier initiates an orderly shutdown to prevent coil saturation. The logic rail is filtered so the control supply ripple remains below 50 mVpp, and the separate reference loop maintains only 20 mVpp of ripple to preserve command stability. Acceleration and deceleration can be shaped over a range that starts at 50 ms and extends to 5 s; these limits are set with external potentiometers. The enable path presents 22 kΩ of resistance and triggers once the node exceeds a threshold of 9.8 V, ensuring that the card is activated only by intentional control signals.
