Specifications

Appendix B
Using Non-Compumotor Motors
We recommend that you use Compumotor ZETA Series motors with the ZETA6104. If you
use a non-Compumotor motor, it must meet the following requirements:
• A minimum inductance of 2 mH, series or parallel, is required. (Compumotor
recommends a minimum inductance of 5 mH.)
• A minimum of 500VDC high-pot insulation rating from phase-to-phase and phase-to-
ground.
• The motor must be designed for use with a bipolar drive (no common center tap).
• The motor must not have riveted rotors or stators.
• Do not use solid rotor motors.
• Test all motors carefully. Verify that the motor temperature in your application is
within the system limitations. The motor manufacturer's maximum allowable motor
case temperature must not be exceeded. You should test the motor over a 2-to-3 hour
period. Motors tend to have a long thermal time constant, but can still overheat, which
results in motor damage.
CAUTION
Consult your motor vendor to verify that your motor meets the above specifications. If you
have questions regarding the use of a non-Compumotor motor with the ZETA6104, consult
your local Automation Technology Center (ATC) or distributor, or refer to the numbers listed
under Technical Assistance on the inside front cover of this document.
Wiring Configurations
Refer to the manufacturer's motor specification document to determine the motor's wiring
configuration. You can also determine the wiring configuration with an ohmmeter using the
procedures below (4-Lead Motor, 6-Lead Motor, 8-Lead Motor). Once you determine the
correct motor wiring configuration, use the terminal connection diagram, shown at the end of
this section, that applies to your configuration.
4-Lead Motor 1. Label one motor lead A+.
2. Connect one lead of an ohmmeter to the A+ lead and touch the other lead of the ohmmeter
to the three remaining motor leads until you find the lead that creates continuity. Label
this lead A–.
3. Label the two remaining leads B+ and B–. Verify that there is continuity between the B+
and B– leads.
4. Proceed to the Terminal Connections section below.