Chapter 3
Connecting the UMI-7774/7772 to Drives and Other Devices
©
National Instruments Corporation
3-15
National Instruments UMI-7774/7772 User Manual
Note
You also can use drives with onboard sinusoidal commutation for brushless motors.
These drives can be more expensive, but each drive requires only one analog output signal.
When you set up the UMI-7774/7772 for sinusoidal commutation, you
connect the axis 1 feedback connector to the set of Hall effect sensors for
one brushless motor and the axis 2 feedback connector to the set of Hall
effect sensors for another brushless motor.
All of the Hall effect sensor signals are pass-through signals to the National
Instruments motion controller general-purpose digital inputs.
Table 3-3.
Control 1 Connector Pin Assignment for Sinusoidal Commutation
Pin
Signal
Optically Isolated
1
Analog Output 1
No
2
Analog Output 3
No
3
+5 V (Output)
No
4
Step (CW)
No
5
NC
No
6
Enable Output
Yes
7
Fault +
Yes
8
Iso Power (Output)
Yes
9
Analog Output
Ground
No
10
Digital Ground
No
11
Digital Ground
No
12
Dir (CCW)
No
13
NC
No
14
Fault –
Yes
15
Iso Common
Yes
