PMX_MULTI
User’s Manual
25
Installation | Sensing Function
4
Pull out the sensing wires from the side of or from below the output terminal cover,
and attach the output terminal cover.
This completes the connections.
Electrolytic capacitor to connect across the load
If the wiring inductance component is large, the following symptoms may appear.
• Oscillation
If the wires used to connect to the load are long, the wiring inductance and capacitance can cause
phase shifting at a level that cannot be ignored. This may lead to oscillation.
• Output fluctuation
If the load current changes drastically in a pulse-shaped pattern, the output voltage may become large
due to the wiring’s inductance component.
You can reduce the inductance component by twisting the load cables, which stabilizes the voltage. How-
ever, if this does not correct the problem, connect an electrolytic capacitor across the load.
Electrolytic capacitor to use
Capacitance: 0.1 µF to several 100 µF
Withstanding voltage: At least 120 % of the rated output voltage of the product
If you are inserting a mechanical switch between the product and the load
If you want to connect and disconnect the load using a
mechanical switch that is inserted between the product and
the load, be sure to include switches in the sensing cables as
shown in the following figure and turn on and off the load
cable and the sensing cables simultaneously. Before you
turn the mechanical switch on or off, be sure to turn off the
OUTPUT key.
Sensing wire
Sensing wire
Example of PMX32-2QU
Load
S
+
–
C
+
–
+S
–S
+
–