National Instruments 7602, 7604

MID-7604/7602Power Drive 26 ni.com

Noticethat an 8-wire motor wired in series is virtually identical to a 6-wire

motorand typically has the same high-torque but low-speed characteristics.

Whilea parallel configuration is not possible with a 6-wire mot or,you can

usuallyobtain high-speed performance with the half-coil connection shown

in Figure 20. This configuration sacrifices low-speed torque for better

high-speedperformance. With this configuration, it is typically not possible

to produce the rated torque of the motor without the risk of the motor

overheatingbecause only half of the windi ngs are being used.

Figure20. Half-CoilStepper Motor Wiring

Figure21showsthewiringforatypical4-wiremotor.

Figure21. 4-WireMotor Wiring

PhaseA

PhaseB

PhaseA

Ground

MotorCase Ground

Shield

PhaseA

PhaseA-CT

PhaseA

PhaseB

PhaseB-CT

PhaseB

MotorCase Ground

Shield

PhaseA

PhaseB

PhaseA

PhaseB

PhaseA

Ground

Contents

Main USER GUIDE MID-7604/7602 POWER DRIVE Contents Compliance FCC/Canada Radio Frequency Interference Compliance* Determining FCC Class FCC/DOC Warnings Class A Conventions Introduction What You Need to Get Started Safety Information Page Front Panel Switches Back Panel Connector Wiring Host Bus Interlock Circuit Front Panel LEDs Driver Fault Output LEDs Driver Inhibit LEDs Limit Status LEDs Front Panel DIP Switch Settings Microstepping Selection Output Current Settings Page Inhibit Input Polarity Setting Limit Status LED Polarity Setting Back Panel Connector Wiring Motor Power TerminalBlocks Encoder TerminalBlocks Page Page Limit Switch TerminalBlocks Breakpoint and TriggerTerminal Blocks Figure11. TriggerTerminal Block Pin Assignment Figure12. BreakpointTerminal Block Pin Assignment Figure14. AnalogOutput Terminal Block Pin Assignment Analog I/O TerminalBlocks Figure13. AnalogInput Terminal Block Pin Assignment Accessories for Optional Use Strain-Relief Bar Panel-Mount Kit (Included) Amplifier/Driver Command Signals Stepper Motor Configurations Figure18. Series Stepper Motor Wiring (Higher Torque, Lower Speed) Figure19. Parallel Stepper Motor Wiring (Higher Speed, Lower Torque) Page Specifications Stepper Amplifiers Encoder Interface Limit and Home Switch Inputs Page Power Supply Host Bus Voltage Interlock Physical Environment Electromagnetic Compatibility Safety Technical Support Resources NI Web Support Worldwide Support