All of the input and output connections on the PXI-4110 front panel have user-replaceable fuses.

If you suspect a blown output channel fuse, remember that an output channel with a blown fuse can source only a few milliamperes of current, regardless of the programmed current limit.

Refer to the table below for fuse ratings and manufacturer information.

Table 12. Fuse Ratings
Input/Output Fuse Rating Description Recommended Manufacturer Part Number
Channels 0, 1, 2 F 1.5 A 125 V User-replaceable chip fuse Littelfuse 045301.5
Auxiliary power input T 6.3 A L 250 V User-replaceable 5 × 20 mm glass fuse Littelfuse 21806.3
Tip Although blown output channel and auxiliary power input fuses are not software detectable, you can use the niDCPower Auxiliary Power Source Available property or the NIDCPOWER_ATTR_AUXILIARY_POWER_SOURCE_AVAILABLE attribute to troubleshoot the auxiliary power input fuse.

Identify the fuse you want to replace using the following figure.

Figure 13. Fuses on the PXI-4110


  1. Output Channel Fuse (Channel 0)
  2. Output Channel Fuse (Channel 2)
  3. Output Channel Fuse (Channel 1)
  4. Auxiliary Input Fuse
  5. Spare Output Channel Fuse

To replace a fuse on the PXI-4110, complete the following steps:

  1. Power down the chassis.
  2. Disconnect all output and auxiliary power connections.
  3. Remove the PXI-4110 from the chassis.
  4. Remove the fuse.
    Fuse Process
    Output channel fuse
    1. Using small pliers, gently pull the fuse to release it from the fuse holder.
    Auxiliary input power fuse
    1. Using a flathead screwdriver, turn the fuse holder cap counter-clockwise to release it from the PXI-4110 front panel.
    2. Gently pull the auxiliary power input fuse to release it from the fuse holder cap.
  5. Install the replacement fuse.
    Fuse Process
    Output channel fuse
    1. Using small pliers, gently place the replacement fuse into the fuse holder.
    Auxiliary input power fuse Use the auxiliary input fuse holder to service the auxiliary fuse on the PXI-4110.
    1. Slide the replacement fuse into the fuse holder cap.
    2. Screw the cap clockwise to replace it on the PXI-4110 front panel.
    Note You can use the spare fuse included on the PXI-4110 to replace an output channel fuse.