2 Equipment Description
2.20 24 Vdc Fuse Protection
102 HPM High-Performance Process Manager Service R688
Honeywell December 2020
Fuse insertion
Use the following procedure to insert a fuse in an HPM backpanel.
Hold the outer barrel of the fusepuller with the fingers of one hand and depress the the
fusepuller’s end cap with the thumb.
Hold the fuse in position with the fingers of your other hand and place the protruding end
of the fusepuller’s inner barrel around the fuse.
Release the end cap while still holding the outer barrel and the fuse.
Move the outer barrel towards the fuse. The greater the movement, the greater the
gripping force will be on the fuse.
Insert the fuse in its backpanel position by vertically moving the fusepuller towards from
the backpanel. Depress the end cap to release the fuse.
Left 7-Slot card file
Table 5 Left 7-Slot Card File Fuse Protection lists the individual backpanel fuses and their application
for the Left 7-Slot card file. The fuse rating is 2 A for fuse locations F1 through F8.
Left 7-Slot Card File Fuse Protection
When HPMM cards occupy the left two slots of a card file, fuse F2 is not in use. Fuse F1 on the
backpanel is used to supply 24 Vdc to the UCN Interface Module.
Table 5 Left 7-Slot Card File Fuse Protection
Slot 1 IOP card and associated FTA
or
UCN Interface Module (24 Vdc) if HPMM exists in
card file
Slot 2 IOP card and associated FTA
Slot 3 IOP card and associated FTA
Slot 4 IOP card and associated FTA
Slot 5 IOP card and associated FTA
Slot 6 IOP card and associated FTA
Slot 7 IOP card and associated FTA
HLAI Optical Coupler Module, U1