104 UDC3300 Limit Controller Product Manual 1/01
9.6 Noise Suppression at the Source, Continued
Contacts, continued
In DC circuits, the power dissipation under steady state condition can be
eliminated by placing a diode (in series with a resistor) in parallel with the
load (see Figure 9-4). The value of R should be less than or equal to the
DC resistance of the inductive load.
Figure 9-4 is an illustration of DC load noise suppression.
Figure 9-4 DC Load Noise Suppression
Inductive
load
D.C.
supply
+
–
R
Diode
20782
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