National Instruments NI 784xR - Manual (Page 51)

Chapter 2 Hardware Overview of the NI 78xxR
R Series Intelligent DAQ User Manual 2-30 ni.com
3. Replace the broken fuse while referring to Figure 2-18 for the fuse
locations.
Figure 2-18. NI 784xR/785xR Replacement Fuse Location
4. Reinstall the PCI or PXI device into the computer or PXI chassis.
Field Wiring Considerations
(NI 783xR/784xR/785xR Only)
Environmental noise can seriously affect the measurement accuracy of the
device if you do not take proper care when running signal wires between
signal sources and the device. The following recommendations mainly
apply to AI signal routing to the device, as well as signal routing in general.
Take the following precautions to minimize noise pickup and maximize
measurement accuracy:
• Use differential AI connections to reject common-mode noise.
• Use individually shielded, twisted-pair wires to connect AI signals to
the device. With this type of wire, the signals attached to the positive
and negative inputs are twisted together and then covered with a shield.
You then connect this shield only at one point to the signal source
1 Littelfuse Part Number 0453 004 (NI Part Number 766247-01)
1