8
ST5/10-S Hardware manual
920-0027 Rev. A1
6/1/09
Connecting the Motor
Never connect or disconnect the motor while the power is on.
Four lead motors can only be connected one way. Please follow the
sketch at the right.
Six lead motors can be connected in series or center tap. In series,
motors produce more torque at low speeds, but cannot run as fast as
in the center tap configuration. In series operation, the motor should
be operated at 30% less than the rated current to prevent overheat-
ing. Winding diagrams for both connection methods are shown
below. NC means not connected.
Eight lead motors can also be connected in two ways: series and parallel. As with six lead motors, series opera
-
tion gives you less torque at high speeds, but may result in lower motor losses and less heating. In series opera-
tion, the motor should be operated at 30% less than the unipolar rated current. The motors recommended in this
manual should be connected in parallel. The wiring diagrams for eight lead motors are shown on the following
page.
A+
A–
B+
B–
4
lead
motor
Red
Blue
Yellow
White
4 Leads
A+
A–
NC
B+
B–
NC
6
lead
motor
Red
Black
Red/
Wht
Green
Grn/Wht
White
A+
A–
NC
B+
B–
NC
6
lead
motor
Grn/Wht
White
Green
Red
Red/
Wht
Black
6 Leads Series Connected
6 Leads Center Tap Connected
