©NationalInstruments Corporation 17 MID-7654/7652Servo Power Motor Drive User Guide
TerminalBlock Wiring
This sectiond escribes how to wirethe terminal blocks onyour
MID-7654/7652.
Servo Motor Power Terminal Blocks
Formotor power w iring, each MID-7654/7652 axis has a separate
5-positionremovable screw terminal block. Figure 7shows a typical servo
motor configuration pin assignment. The dotted loop indicates a shielded
cable.
Figure7. Typical Servo Motor (DC Brush Type) TerminalBlock Pin Assignment
Warning Theservo motor connectors on this drive are energized when the unit is powered
on. The rearguard must be in place ata ll times whilet he unitis connected to a power
outlet. Disconnect the MID-7654/7652 unit from power outlet before connecting wires
to or disconnecting wiresfrom the servomotor connectors. Strip back the insulation of
theservo motor wires to the servo motor connectors no more than 7 mm. Reattach the rear
guard before you reconnect the unit to a powerout let.Failure to do so could result in
electricshock leading to serious bodily injury or death. Refer to the Rear Guard section of
this guide for information on using the rear guard.
Youshould use shielded 20 AWG wire or larger for the motor power
cable. If available,connect a motor case ground wire to pin 3
(Ground/Shield) on the MID-7654/7652 as shown in Figure 7; this wire
helpsavoid ground loops and signal noise problems. (Case ground connects
to the motor housing, not to any of the motor power terminals.)
Caution Nevercon nect unused center taps or winding terminals to pin 3.
1
2
3
4
5
Motor+
Motor–
MotorCase Ground
+–
Shield
ServoMotor