8
9
Rev:5.0
6/08/2010
Rev:5.0
6/08/2010
MSST5/10-S UserManual
MSST5/10-S UserManual
3.2 Connecting the Motor
Never connect the motor to or disconnect it from the drive. Insulate unused motor leads
separately, and then secure. Never connect motor leads to ground or to a power supply.
There are several options for connecting a motor to a drive.
Four lead motors
can only be connected one way, as in the drawing below:
Six lead motors
can be connected in series or center tap. When connected in series, motors pro-
duce 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. Wiring diagrams for both connection methods are shown below.
Note: NC = not connected
Eight lead motors can also be connected in two ways: series and parallel. As with six lead mo-
tors, series mode will provide more torque at low speeds and less torque at high speeds. When
connected in series, the motor should be operated at 30% less than the rated current to prevent
overheating. The wiring diagrams for eight lead motors are shown below.
A-
B-
B+
NC
NC
A+
A-
B-
NC
A+
B+
NC
6
Lead
motor
6
Lead
motor
6 Leads Series Connected
6 Leads Center Tap Connected
A+
B+
B-
A-
A+
B+
A+
B-
8
Lead
motor
8
Lead
motor
8 Leads Series Connected
8 Leads Center Tap Connected
