EEA-PAM-581-C-30 Vickers
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The Vickers EEA-PAM-581-C-30 is a power amplifier in the EEA-PAM-5**-C-32 Power Amplifiers series with a nominal supply voltage of 24 V DC and a power requirement of 40 W. It features four ramp potentiometers with ramp times adjustable between 0.050 and 5 seconds, and includes an under-voltage shutdown at 18 V DC.
Internal Product Review
The EEA-PAM-581-C-30 is a Vickers power amplifier featuring a ±15 V control supply voltage and 50 mA supply current, designed for reliable performance in precision control systems. The unit supports up to four ramp potentiometers, allowing ramp times between 0.050 and 5 seconds for flexible application tuning. Its under-voltage shutdown at 18 V DC adds a layer of safety to critical operations.
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Product Description:
The EEA-PAM-581-C-30 is a plug-in power amplifier card produced by Vickers as part of the EEA-PAM Power Amplifiers series. It is intended for industrial automation panels where an electronic interface must translate low-level control commands into proportional drive power for field devices.
The card operates from a dual control rail of ±15 V and draws only 50 mA, so upstream regulators can be sized modestly. Its main power stage is referenced to a 24 V DC system bus and absorbs up to 40 W during full output, a figure that guides cabinet thermal planning. Supply quality can deteriorate by as much as 10 % pk–pk ripple before the amplifier’s accuracy is compromised. Four onboard ramp potentiometers let the user set individual up- and down-slew profiles; with those pots the output rise or fall can be extended to 5 s or compressed to 0.050 s, allowing smooth hydraulic motion or fast emergency cutoff as needed.
For external reference sources, the module provides a constant-current output of 5 mA and a selectable voltage reference of ±10 V; these signals drive remote summing networks without significant loading. Reference cleanliness is maintained by keeping ripple below <20 mV pk–pk, which minimizes dither in proportional valves. To protect the circuit, an internal comparator removes drive power when the main supply collapses to 18 V DC, preventing partial saturation that could leave actuators in an indeterminate position. Combined with the earlier ramp controls, these features complete the amplifier’s closed-loop power profile without repeating information already noted.
