LEESON PWM DC Control: 174299 - Manual (Page 28)

2
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 15 shows a connection for
fixed high and low speed adjust potentiometers.
S3
S2
S1
HIGH
SPEED
LOW
SPEED
CW
5K
OHM
CW
5K
OHM
Figure 1. Adjustable Fixed Speeds Using Potentiometers in Series