The Power and I/O Accessory has replaceable fuses and includes one additional fuse of each type.

Figure 9. Fuse Locations


  1. Isolated output fuses, 0.5 A
  2. Spare 0.5 A fuse
  3. ANLG terminal fuse, 0.1 A
  4. Spare 2 A fuse
  5. ICS 3, V terminal fuse, 10 A
  6. Spare 10 A fuse
  7. Spare 0.1 A fuse
  8. Camera V terminal, 2 A
Table 1. Power and I/O Accessory Fuses
Protected Signal Replacement Fuse Quantity Littelfuse Part Number Fuse Description
ICS 3, V terminal 1 0448010.MR 10 A, 125 V NANO2 ® Fuse, 448 series, 6.10 × 2.69 mm
Camera V terminal 1 0448002.MR 2 A, 125 V NANO2 ® Fuse, 448 series, 6.10 × 2.69 mm
Isolated outputs 1 0448.500MR 0.5 A, 125 V NANO2 ® Fuse, 448 series, 6.10 × 2.69 mm
ANLG terminal 1 0448.100MR 0.1 A, 125 V NANO2 ® Fuse, 448 series, 6.10 × 2.69 mm
Note You can use a handheld DMM to verify the continuity of a fuse.

Complete the following steps to replace a blown fuse:

  1. Unplug the power supply.
  2. Remove all signal wires and cables from the Power and I/O Accessory.
  3. Remove a side panel. Use a Phillips head screwdriver to remove the 2 retaining screws.
  4. Slide the circuit board out.
  5. Replace any blown fuses with an equivalent replacement fuse. Replacement fuses are labelled as SPARE on the circuit board.