EEA-PAM-523-A-32

EEA-PAM-523-A-32 is a Vickers power amplifier in the EEA-PAM Power Amplifiers series. It operates from a nominal 24 VDC supply and consumes 50 W to power its control and output circuits. Reverse-polarity supply protection helps prevent damage if the power connections are reversed. The input current at a 0 V command is 0.3 A, while the maximum solenoid current is 1.6 A for driving the connected valve solenoid. Overload detection resets automatically after the overload condition is removed.

The direct voltage input has an impedance of 47 kΩ, which limits loading on a voltage command source. The current input impedance is 100 Ω for converting an applied current command into a control signal. The factory gain setting is 10% per volt, determining the change in commanded output for each volt of input. The factory deadband setting is 25% of maximum stroke, establishing the command range before valve movement begins.

The amplifier provides ±15 V control supply outputs rated at 50 mA for external control circuitry. It also supplies ±10 V reference outputs rated at 5 mA for command references and adjustment circuits. Solenoid output monitoring is scaled at 1 V/A, allowing monitor voltage to represent solenoid current. The monitor point has a 10 kΩ impedance to reduce loading by connected measuring equipment. Temperature drift is ±1 mV/ºC, indicating the change in signal voltage with temperature. The unit has a mass of 330 g.