EEA-PAM-581-C-33 Vickers

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The Vickers EEA-PAM-581-C-33 is a power amplifier with a power rating of 50 W and a nominal supply voltage of 24 VDC. Part of the EEA-PAM-5**-C-32 Power Amplifiers series, it has a maximum solenoid current of 3.2 A and input current at zero command of 1.7 A. This unit features reverse-polarity protection and supply undervoltage shutdown at 18 VDC.

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Product Description:

The EEA-PAM-581-C-33 is a plug-in power amplifier card produced by Vickers and organized within the EEA-PAM-5**-C-32 Power Amplifiers series. Installed in hydraulic valve drivers, it converts low-level command voltages into controlled solenoid current so proportional valves can meter flow or pressure with repeatable accuracy in industrial automation systems.

The command input accepts current signals across a resistance of 100 Ω, while a separate voltage path is buffered by 47 kΩ input impedance to suit PLC or motion controller outputs. An enable channel registers logic high once the level exceeds 9.8 VDC, and the same threshold applies to the independent ramp enable input for timed acceleration or deceleration. Normal operation is supported by a nominal board supply of 24 VDC; if that rail drops to 18 VDC the amplifier shuts down to protect the valve. Internal circuitry also furnishes a ±15 V reference (50 mA maximum) for external sensors, and reverse-polarity protection prevents damage if the supply wiring is crossed.

With a baseline input command of zero, the card draws 1.7 A so the valve spool remains centered, and it can produce a feedback monitor of ±10 V that tracks full spool stroke for diagnostics. The output stage delivers up to 3.2 A to the solenoid winding, a figure matched to most NG06 and NG10 proportional valves. Total board dissipation is rated at 50 W, so cabinet ventilation must remove that heat along with dynamic valve losses. Duplicate 22 kΩ resistances on the enable and ramp circuits simplify wiring, and onboard LEDs give quick visual confirmation of power and status.

Wake Industrial offers a 1-year warranty on this amplifier, can provide same-day shipping for urgent orders, and keeps quotations valid for 30 days to streamline purchasing.

Current Input Resistance
100 Ω
Enable Input Resistance
22 kΩ
Enable Input Threshold
9.8 VDC
Input Current At Zero Command
1.7 A
Main Output Monitor
±10 V (full stroke)
Max Solenoid Current
3.2 A
Nominal Supply Voltage
24 VDC
Power Rating
50 W
Ramp Enable Input Resistance
22 kΩ
Ramp Enable Threshold
9.8 VDC
Reference Output (±15 V)
±15 V (50 mA max)
Reverse-polarity Protection
Yes
Supply Undervoltage Shutdown
18 VDC
Voltage Input Impedance
47 kΩ

Frequently Asked Questions about EEA-PAM-581-C-33:

Q: What is the nominal supply voltage requirement for the EEA-PAM-581-C-33 power amplifier?

A: The EEA-PAM-581-C-33 has a nominal supply voltage of 24 VDC.

Q: What is the maximum solenoid current supported by the EEA-PAM-581-C-33?

A: The maximum current available for solenoids on this unit is 3.2 A.

Q: What reference output voltage and current does the EEA-PAM-581-C-33 offer?

A: The EEA-PAM-581-C-33 provides a reference output of ±15 V with a maximum of 50 mA.

Q: Does the EEA-PAM-581-C-33 have reverse-polarity protection capabilities?

A: Reverse-polarity protection is included on this model to safeguard against wiring errors.

Q: At what voltage does the supply undervoltage shutdown function of the EEA-PAM-581-C-33 activate?

A: When the supply voltage drops to 18 VDC, this amplifier initiates undervoltage shutdown.


Internal Product Review

  • ‘‘The EEA-PAM-581-C-33 power amplifier from Vickers delivers precise control with a maximum solenoid current of 3.2 A and a nominal supply voltage of 24 VDC. This unit features reverse-polarity protection and automatic supply undervoltage shutdown at 18 VDC, enhancing system safety. Overall, this amplifier is a reliable choice for demanding electro hydraulic applications.’’

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