National Instruments UMI-7664 User Manual And Specifications page 22

You can configure the axis Enable output signal as active low or active high using the ENABLE switch.
Refer to Figure 14 for the location of this switch. The down position for the switch corresponds to active
low and the up position for the switch corresponds to active high. Table 3 shows the enable output pin
voltage at different ENABLE switch settings.
Enable Signal State
Activated
Deactivated
Note You must configure the NI 73xx motion controller Inhibit Out signals as active low for proper
operation of the inhibit logic on the UMI-7774/72. This is the default setting for these signals.
Figure 19 shows a simplifed connection diagram for the Enable, Fault, and Global Stop signals.
Controller
Axis
Inhibit
Host Bus
Interlock
Shutdown
User Supplied
Note If you are connecting the Enable output to inductive loads, such as relays and solenoids,
special precautions may be necessary. Refer to the
section for more information.
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Table 3. Enable Output Voltage and Switch Settings
ENABLE Switch Setting
on UMI
Active Low
Active High
Active Low
Active High
UMI-7774/72
4
Global Stops
Shutdown
Inhibit_All
Figure 19. Fault, Enable, and Global Stop Wiring Diagram
Connecting Inductive Loads to the UMI-7774/72
21
Enable Output Voltage Level
V
iso
Open
Open
V
iso
Axis 1
Enable
Drive 1
Fault
Axis 2
Enable
Drive 2
Fault
NI UMI-7774/72 User Guide and Specifications