Parker Gemini GT6 Series Hardware Installation Manual page 66

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 .
Proceed to the Terminal Connections section below.
4.
6-Lead Motor
1. Determine, with an ohmmeter, which three of the six motor leads are common (one
phase).
2. Label each one of these three motor leads A.
3. Using the ohmmeter, verify that the remaining three leads are common.
4. Label the remaining three leads B.
5. Set the ohmmeter range to the 100 ohm scale (approximately).
6. Connect the ohmmeter's negative lead to one of the motor leads labeled A.
Alternately measure the resistance to the two remaining motor leads also labeled A.
The resistance measurements will reflect one of the following two scenarios.
Scenario #1 — The resistance measurements to the two remaining motor leads are
virtually identical. Label the two remaining motor leads A+ and A–. Label the motor
lead connected to the negative lead of the ohmmeter A CENTER TAP (this is the
center tap lead for Phase A of the motor).
Scenario #2 — The resistance measurement to the second of the three motor
leads measures 50% of the resistance measurement to the third of the three motor
leads. Label the second motor lead A CENTER TAP (this is the center tap lead for
Phase A of the motor). Label the third motor lead A–. Label the motor lead
connected to the ohmmeter A+.
7. Repeat the procedure as outlined in step 6 for the three leads labeled B
(B CENTER TAP is the center tap lead for Phase B of the motor).
8. Proceed to the Terminal Connections section below.
Appendix B – Non-Compumotor Motors
65