Chapter 4 Installing Hardware
4-21
⑤
A relay or a solenoid valve is used as a DC load. A diode is connected in parallel to absorb the surge
voltage that occurs when the load is OFF.
⑥
An electromagnetic contactor is used as an AC load. A resistor and a capacitor are connected in
parallel to absorb the surge voltage that occurs when the load is OFF.
Electromagnetic contactor
Y7
C0
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