Chapter 2 Hardware Overview of the NI 78xxR
R Series Multifunction RIO User Manual 2-28 ni.com
3. Replace the blown fuse while referring to Figure 2-18 for the fuse
locations.
Figure 2-18. NI 784xR/785xR Replacement Fuse Location
(Littelfuse Part Number 0453004)
4. Reinstall the PCI, PCI Express, or PXI device into the computer or PXI
chassis.
PCI Express Device Disk Drive Power Connector
(NI PCIe-784xR/785xR Devices) The disk drive power connector is a four-pin
hard drive connector on PCI Express devices that, when connected,
increases the current the device can supply on the +5 V terminal.
When to Use the Disk Drive Power Connector
PCI Express R Series devices without the disk drive power connector
installed perform identically to other R Series devices for most applications
and with most accessories. For most applications, it is not necessary to
install the disk drive power connector.
However, you should install the disk drive power connector in either of the
following situations:
•You need more power than listed in the device specifications
•You are using an R Series accessory with no external power supply,
such as the cRIO-9151
Refer to the specifications document for your device for more information
about PCI Express power requirements and power limits.
1 NI PCIe-784xR/785xR Fuse Location 2 NI PXI-784xR/785xR Fuse Location
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