MID-7654/7652 Servo Power Motor Drive User Guide
16
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Caution
Never
connect unused center taps or winding terminals to pin 3.
Depending on your motor, you may need to reverse the connections shown in Figure 7, as there is no
industry standard for direction of movement relative to the positive and negative motor inputs. Table 8
shows the National Instruments motion control standard directional polarity.
Figure 8 shows clockwise and counter-clockwise motor rotation.
Figure 8.
Clockwise and Counter-Clockwise Motor Rotation
Rear Guard
The rear guard consists of the protection cover, protection plates, and bottom mounting plate as shown
in Figure 9.
Table 8.
National Instruments Standard Directional Polarity
Commanded
Direction
Description
Motor Signal Relationship
Command Signal
Forward
Clockwise (CW) facing motor
shaft
Motor – is greater than
Motor +
Positive voltage
Reverse
Counter-clockwise (CCW)
facing motor shaft
Motor + is greater than
Motor –
Negative voltage
CCW
CW
