3 4
Application Notes
Single speed potentiometer control of multiple drives
Multiple drives can be controlled with a single speed adjust potentiometer (Figure 19).
Optional ratio potentiometers can be used to scale the PCM4 output voltage, allowing
independent control of each drive (Figure 20, page 35).
Motor
B
Motor
A
A 2
A 1
S2
S1
Drive B
A 2
A 1
S2
S1
Drive A
ratio pot B
10K
Ω
ratio pot A
10K
Ω
S3
Figure 19. Single Speed Potentiometer Control of Multiple Drives
RATIO POT A
10K OHM
S3
A1
A2
DRIVE A
MOTOR
A
MOTOR
B
S1
S2
A1
A2
DRIVE B
S1
S2
RATIO POT B
10K OHM
