Download MM23000 Series - Cole
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50 Application Notes Adjustable speeds using potentiometers in series Replace the speed adjust potentiometer with a single pole, multi-position switch, and two or more potentiometers in series, with a total series resistance of 10K ohms. Figure 20 shows a connection for fixed high and low speed adjust potentiometers. Figure 21. Adjustable Fixed Speeds Using Potentiometers in Series