MID-7604/7602Power Drive 16 ni.com
Back Panel Connector Wiring

Motor Power TerminalBlocks

Eachax is on the MID-7604/7602 has a separate 5-position removable
screwterminal block for motor power wiring. Figure 4 shows a typical
stepper motor configurationpin assign ment.
Note The dotted loop indicatesa shielded cable. A line above a signal indicates that the
signal is active-low.
Figure4. TypicalFull-Coil Stepper Motor (2-Phase Type)
TerminalBlock Pin Assignment
Warning Thestepper motor connectors on this drive are energized when the unit is
poweredon. Disconnect the MID-7604/7602 unit from the power outlet before connecting
wirest o ordisconnecting wires from the stepper connectors. Strip back the insulation of
the stepper wires to the stepper connectors no more than 7 mm. Failuretodosocould
result in electric shock leading to serious bodily injury or death.
Use shielded, 20 AWGwire or larger for the motor power cable.
Ifavailable, you should connect a case ground wire to pin 3
(Ground/Shield) to avoidground loops an d signal noise problems.
Caseground connects tothe motor housing, and not to the motor power
terminals.
The MID-7604/7602 contains bipolar chopper drivers.You must wire the
stepper motors in a 4-wire configurationas shown in Figure 4. You must
isolateunused lead wires and leave them disconnected. Refer to the Stepper
Motor Configurations section in this guide for additional information on
connecting6- and 8-wire motors and on the alternatehalf-coil
configuration.
1
2
3
4
5
PhaseA
PhaseB
PhaseA
CaseGround
Shield
StepperMotor
PhaseB