EEA-PAM-568-C-32 Vickers
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The Vickers EEA-PAM-568-C-32 is part of the EEA-PAM Power Amplifiers series and is compatible with the KFDG5V-8 valve. It features a command signal voltage range of plus or minus 10 volts and a command signal current range of plus or minus 20 milliamps. The amplifier includes 4 command preset potentiometers at 50 kOhm each and provides short-circuit protection for its outputs.
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Product Description:
The EEA-PAM-568-C-32 is a plug-in power amplifier card from Vickers within the EEA-PAM Power Amplifiers series. Intended for closed-loop proportional valve operation, the board converts low-level controller commands into coil-drive current so hydraulic actuators follow electronic set points. It is factory aligned for the KFDG5V-8 valve and includes trimmed reference outputs, signal conditioning, and short-circuit protected outputs that simplify integration into machine automation panels.
Current mode commands enter at pin Z6 through an input impedance of 100 Ohm, allowing the source to deliver the specified control signal without excessive loading. In this mode the board accepts a span of +/-20 mA, so full valve travel can be generated from common 4–20 mA or ±20 mA loops. Voltage mode is processed by a 47 kΩ differential network; the high impedance of 47 kOhm minimizes signal loss when the controller is several feet away. Usable voltage commands must stay within +/-10 V, and four on-board preset potentiometers rated at 4 x 50 kOhm let maintenance technicians trim gain, dither, and null without external components.
The card provides an internal reference of +/-10 V x 10 mA for feeding external command pots; when those are used, Vickers recommends a 5 kΩ, 0.25 W device that connects to the direct-voltage pins B6, B8, B10, or Z8. For fixed bipolar references, pin B2 supplies -10 V (+/-1%) x 5 mA and pin Z2 supplies +10 V (+/-1%) x 5 mA, eliminating the need for separate power rails. An auxiliary output of +15 V powers an LVDT position transducer, while the inverting input at Z10 enables summing junction configurations. All output stages tolerate indefinite shorts to ground, so accidental wiring mistakes do not damage the amplifier during commissioning.
Frequently Asked Questions about EEA-PAM-568-C-32:
Q: Which valve models are compatible with the EEA-PAM-568-C-32 amplifier?
A: The EEA-PAM-568-C-32 power amplifier works with KFDG5V-8 valves.
Q: What is the allowable command signal voltage range for the EEA-PAM-568-C-32?
A: This amplifier accepts a command signal voltage range of +/-10 V.
Q: What is the command current input impedance for the EEA-PAM-568-C-32?
A: The command signal current input impedance of this unit is 100 Ohm.
Q: How many and what value command preset potentiometers are included in the EEA-PAM-568-C-32?
A: There are four 50 kOhm command preset potentiometers on the EEA-PAM-568-C-32.
Q: Are the outputs of the EEA-PAM-568-C-32 amplifier short-circuit protected?
A: The outputs of the EEA-PAM-568-C-32 amplifier are short-circuit protected for added safety.
