Fault Input And Disabled Status Indicators; Sinusoidal Commutation Configuration - National Instruments UMI-7774 User Manual

Vcc
UMI-7774/7772
© National Instruments Corporation
Chapter 3
Current Limiter
Figure 3-11. UMI-7774/7772 Optically Isolated Digital Output Circuit and Connection

Fault Input and Disabled Status Indicators

Each axis of the UMI-7774/7772 has the following two status LEDs:
DISABLED and FAULT. If the Enable output signal is deactivated for any
reason, the DISABLED LED illuminates. If the Fault input signal is also
active, both the FAULT and the DISABLED LEDs for the axis illuminate.
Refer to Figure 3-5 for the locations of these LEDs.

Sinusoidal Commutation Configuration

The control connectors for axes 1 and 2 of the UMI-7774/7772 have
additional analog output signal connections to accommodate brushless
servo drives that do not provide onboard sinusoidal commutation. These
signal connections are shown in Table 3-3 and Table 3-4. For these types
of drives, you must use a National Instruments motion controller that
provides sinusoidal commutation. The National Instruments motion
controllers with this feature provide two analog output commands, with
a phase difference of 120 degrees, for a single axis of motion. You can
connect each UMI-7774/7772 to two brushless drives. For example,
Connecting the UMI-7774/7772 to Drives and Other Devices
Current
Sense
to an External Device
3-13 National Instruments UMI-7774/7772 User Manual
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Output
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