LEESON SCR Thyristor Motor Control - Manual (Page 51)

45 Application Notes SPEEDMASTER™ OPERATION MANUAL
Independent adjustable speeds
Replace the speed adjust potentiometer with a single pole, multi-
position switch, and two or more potentiometers in parallel, with
a total parallel resistance of 10K ohms. Figure 23 shows the
connection of two independent speed adjust potentiometers that
can be mounted at two separate operating stations.
S3
S2
S1
SPEED 1
SPEED 2
20K
OHM
CW CW
20K
OHM
Figure 23. Independent Adjustable Speeds