EHH-AMP-702-K-20 Vickers
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The Vickers EHH-AMP-702-K-20 is part of the Vickers Accessories series and features a nominal supply voltage of 24 V DC with an IP67 ingress protection rating. This unit supports a command input signal range of 4 to 20 mA, includes short-circuit and reverse polarity protection, and has a maximum output current of 1.6 Amps. The housing is made from PA6 glass-reinforced plastic and it uses an ISO 4400 mounting interface.
Internal Product Review
The EHH-AMP-702-K-20 from Vickers Accessories is an electronic amplifier featuring a 4–20 mA command input signal and a nominal 24 V DC supply voltage. Its IP67 ingress protection and reverse polarity protection support reliable operation in demanding environments. The combination of short-circuit protection and a compact housing design makes this amplifier a strong choice for modern hydraulic control systems.
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Product Description:
The EHH-AMP-702-K-20 is an electronic amplifier module offered by Vickers within the Vickers Accessories series. It is designed to mount directly on a solenoid coil through the ISO 4400 (DIN 43650) connector and translate a process-control signal into a regulated drive current for hydraulic or electromechanical elements used in industrial automation. By converting a standard current command into a pulse-width-modulated output, the unit simplifies panel wiring while keeping the power stage close to the actuator, reducing conducted noise and improving response.
The module operates from a nominal supply of 24 V DC and accepts a 4–20 mA command signal that is terminated by an internal 250 Ω input resistance, allowing direct connection to common PLC analog output cards. At full drive it draws up to 35 W, a figure that includes solenoid consumption, so thermal budgeting can be completed with the single value of 35 W. The power stage can deliver a maximum load current of 1.6 A, enabling proportional control of medium-size solenoids without an external booster. Reverse-polarity and short-circuit protection circuits disconnect the output if wiring mistakes or load faults occur, while the absolute maximum supply limit of 40 V DC prevents damage from over-voltage transients.
The output is generated by a carrier that switches at 1200 Hz, minimizing audible noise and providing fine current resolution, whereas an internal dither of 120 Hz is superimposed to overcome spool friction in proportional valves. Sealing gaskets, a Pg9 cable clamp thread, and a PA6 glass-reinforced plastic housing combine with an IP67 rating so the amplifier tolerates wash-down or outdoor locations once the connector is engaged. Despite these protections, the device weighs only 0.07 kg, which avoids adding significant mass to the valve manifold or cable harness.
