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5-6. Output Voltage Remote Sensing
The PSF Series power supply unit has an output voltage remote sensing
function. It eliminates influences of voltage drop between the power supply
unit and load, which is caused by the contact resistance or the resistance of the
load cable conductors. It compensates for a voltage of 1V on the single side.
When the voltage remote sensing function is used, the voltage at the front and
rear output terminals of the power supply unit must not exceed the rated voltage.
Be very careful. If the load is too far from the power supply unit, inductance and
capacity of the load cables may cause oscillation. To avoid such oscillation,
connect an electrolytic capacitor of several hundred
μ
F to several thousand
μ
F to
the load terminals.
(1) Make sure that the POWER switch is off before starting work.
(2) Disconnect the wire that short-circuits the + and +S terminals or - and
-S terminals of four-terminal block on the left of the output terminals on the
rear panel.
(3) Connect the positive sensing terminal (+S) with the positive side of the load
and the negative sensing terminal (-S) with the negative side of the load as
shown below. If the sensing wires are disconnected, control becomes
unstable and voltage over the set voltage is applied to the load. Connect
the sensing wires firmly.
Current of approximately 1mA flows through the sensing wires at the rated output
voltage. Use AWG 26 to 18 wires as the sensing wires
．
◆
See Section
、
“5-2. Connecting Load with Output Terminals”
above.
Fig. 5-7 Remote Sensing Connection
