+5 V Power Source - National Instruments NI 660 Series User Manual

Chapter 3 Signal Connections
enabled by default and can be disabled by way of software. If the module
is used in a compact PCI chassis that does not have the 10 MHz PXI
backplane clock, the phase locking is automatically disabled. Additionally,
PXI trigger line 6 corresponds to PXI star trigger on PXI TIO devices.
Figure 3-9 shows the RTSI signal connection scheme for PXI TIO devices.

+5 V Power Source

The +5 V pin on the I/O connector supplies power from the computer
power supply through a self-resetting fuse. The fuse resets automatically
within a few seconds after removal of an overcurrent condition. The power
pin is referenced to the D GND pins and can supply power to external
digital circuitry. The power rating for this +5V pin on NI 660x devices is
+4.45 to +5.25 VDC at 1A.
Caution Do not connect the +5 V power pin directly to D GND, R GND, or any pin
configured for output on NI 660x devices, or any voltage source or output pin on another
device. Doing so can damage the device and the computer. National Instruments is not
liable for damages resulting from such a connection.
NI 660x User Manual
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PXI Star 6
PXI Trigger
<0..5>
PXI Trigger 7
Figure 3-9. RTSI Signal Connection for PXI
3-16
CtrnSource
CtrnGate
CtrnAux
CtrnInternalOutput
20 MHz Timebase
Master Timebase
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