Honeywell HPM, Service

Page: 102 / 498

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.
Step Action
1
Hold the outer barrel of the fusepuller with the fingers of one hand and depress the the
fusepuller’s end cap with the thumb.
2
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.
3
Release the end cap while still holding the outer barrel and the fuse.
4
Move the outer barrel towards the fuse. The greater the movement, the greater the
gripping force will be on the fuse.
5
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
Fuse Rating Protection Application
F1 2 A fast-action Slot 1 IOP card and associated FTA
or
UCN Interface Module (24 Vdc) if HPMM exists in
card file
F2
2 A fast-action Slot 2 IOP card and associated FTA
F3
2 A fast-action Slot 3 IOP card and associated FTA
F4 2 A fast-action Slot 4 IOP card and associated FTA
F5 2 A fast-action Slot 5 IOP card and associated FTA
F6 2 A fast-action Slot 6 IOP card and associated FTA
F7 2 A fast-action Slot 7 IOP card and associated FTA
F8 2 A fast-action HLAI Optical Coupler Module, U1