EM Series Drive Hardware Installation Manual
7
HWMN-EM-R20111018
2 phase, 8-lead Motors Connections
8 lead motors offer a high degree of flexibility to the system designer in that they may be connected in series or parallel, thus satisfying a
wide range of applications.
Series Connections
A series motor configuration would typically be used in applications where a higher torque at lower speeds is required. Because this
configuration has the most inductance, the performance will start to degrade at higher speeds. In series mode, the motors should also be
run at only 70% of their rated current to prevent over heating.
Parallel Connections
An 8 lead motor in a parallel configuration offers a more stable, but lower torque at lower speeds. But because of the lower inductance,
there will be higher torque at higher speeds. Multiply the per phase (or unipolar) current rating by 1.96, or the bipolar current rating by
1.4, to determine the peak output current.
Matching Stepper Motors
Minimum Motor
Size
Typical Motor Size
Maximum Motor
Size
Leadshine Stepper Motors
EM402
NEMA 8
NEMA
17
MEMA
23
35HS01, 39HS02, 42HS02, , 42HS03
EM503
NEMA
14
NEMA
23
MEMA
23
57HS04, 57HS09, 57HS13, 57HS22
EM705
NEMA
17
NEMA
23
MEMA
34
57HS22, 86HS35, 86HS45
EM806
NEMA 23
NEMA 34
NEMA 34
86HS35, 86HS45, 86HS85
