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Power supply to load four-wire connection method

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Power supply to load four-wire (4-wire) connection method is designed for the influence decrease (compensation) of the connecting wires resistance. This feature is rather useful because the resistive value of the wires resistance, when connecting the load, distorts the set output voltage of the power supply. Therefore the power supply output voltage can differ from the true value. This connection allows you to compensate up to 1V of the dynamic voltage drop on the connecting wires.

To implement the four-wire connection it’s necessary to connect + /-SENSE control inputs of the power supply to the load point under control using a thin twisted shielded pair.

If the load placed distantly from the power source it can cause the output voltage oscillation of the power supply. There can be a capacitor of 100µF connected parallel to the load in order to eliminate this effect.



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