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NI 9503 User Manual and Specifications
The NI 9503 contains a highly efficient power stage. Two-phase
stepper motors come in 4-, 6-, and 8-wire variations. You must wire
the stepper motors in a 4-wire configuration as shown in Figure 3.
Caution
Never connect unused stepper motor terminals
to pin 9 (Chassis Ground) or to each other.
When using a 6- or 8-wire stepper motor you must leave unused
lead wires disconnected. Figure 4 shows a 6-wire and an 8-wire
stepper motor.
Figure 4.
6-Wire and 8-Wire Stepper Motors
6-wire
8-wire