Fault - National Instruments UMI-7774 User Manual

PNP
(Sourcing)
Output Device
V+
Out
V–
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Chapter 3

Fault

The Fault signal is an optically isolated digital input. If the Fault input
signal is asserted, the DISABLED LED is lit and the Enable output signal
is deactivated. You can wire the Fault input to either a current sourcing or
sinking output from a drive or other device. Refer to Figure 3-6 and
Figure 3-7 for examples of wiring the Fault input signal to sourcing and
sinking output devices. In both cases, the isolated power (V
common (C ) signals provided on the control connector are used to power
iso
the external devices.
Use a manual operator switch to handle disabling an axis. Refer to
Figure 3-8 and Figure 3-9 for examples of wiring the fault input signal to
high-side and low-side switches.
You can configure the axis Fault input signals as active-low or active-high
inputs using the switch for the axis labeled FAULT. The down position
of the switch corresponds to active-low and the up position of the switch
corresponds to active-high.
Refer to the Voltage Considerations for the UMI-7774/7772
for voltage information that applies to the Fault input signal.
Viso
Fault +
Current Limiter
Fault –
Ciso
UMI-7774/7772
Figure 3-6. Example of Wiring a Sourcing Output Device to the Fault Input
Connecting the UMI-7774/7772 to Drives and Other Devices
3-9 National Instruments UMI-7774/7772 User Manual
) and isolated
iso
section
Vcc