EHH-AMP-702-C-20 Vickers
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The Vickers EHH-AMP-702-C-20 is part of the Vickers Accessories series and operates with a nominal supply voltage of 24 V DC and a maximum power consumption of 35 W. It features an absolute maximum voltage of 40 V DC, a maximum output current of 1.6 A, and supports 24 V logic command input. The dither frequency is 120 Hz and the PWM frequency is 1200 Hz.
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Product Description:
The EHH-AMP-702-C-20 is an electronic drive amplifier designed by Vickers and supplied under the Vickers Accessories series. The card interfaces between low-level digital controllers and the proportional coils found in hydraulic or motion-control assemblies, allowing automation equipment to regulate actuator force or speed through current modulation. Installed inside a cabinet or manifold block, it receives a single DC supply and produces a controlled output that follows external command signals while protecting connected loads.
The module operates from a nominal bus of 24 V DC, yet its circuitry can withstand surges up to 40 V DC without permanent loss of function. During operation, it draws no more than 35 W, and the power channel can source a continuous 1.6 A to the coil, giving adequate dynamic range for most standard proportional valves. A high input impedance of 2700 Ohms minimizes loading on the driving PLC. The command interface accepts 24 V logic, and output slew begins when the incoming level passes the 15 V on-threshold and is cut off below the 5 V off-threshold, creating a clear hysteresis band for electrical noise immunity. An internal pulse-width modulator shapes the coil current so that it remains linear with respect to the reference signal.
The dynamic qualities of the amplifier help tailor hydraulic response. The pulse-width modulator runs at 1200 Hz, providing fine current granularity without inducing mechanical buzz. For smoother spool movement, the board superimposes a 120 Hz dither on the drive signal, overcoming static friction inside the valve. Adjustable ramp generators allow response to be lengthened up to 5 s or shortened to 50 ms, preventing shocks to the system. The assembly sustains full ratings in ambient air as hot as +70 °C, which supports enclosure mounting near warm power packs.
Frequently Asked Questions about EHH-AMP-702-C-20:
Q: What is the nominal supply voltage required for the EHH-AMP-702-C-20?
A: The EHH-AMP-702-C-20 can operate at a nominal supply voltage of 24 V DC.
Q: What is the highest output current that the EHH-AMP-702-C-20 can deliver?
A: The maximum output current of the EHH-AMP-702-C-20 is 1.6 A.
Q: What type of command input does the EHH-AMP-702-C-20 support?
A: This unit supports 24 V logic command input for control operations.
Q: What is the absolute maximum voltage permitted for the EHH-AMP-702-C-20?
A: The absolute maximum voltage that can be applied is 40 V DC.
Q: What is the maximum power consumption rating of the EHH-AMP-702-C-20?
A: The EHH-AMP-702-C-20 has a maximum power consumption of 35 W.
