User Manual

30 Part 003609A revision 01 December 16, 2002
Amosphere NPM Installation Procedures (WCS)
Fuses
PDP
The PDP in each NPM rack contains three 0.25A, 250V, fast-blowing fuses
(1.25 × 0.25 inch) to protect the alarm cards on the utility shelf from damage in
the event of an electrical overload.
Table 2.12 shows the +24V DC feed to which each fuse is connected.
RFSS Module
Each RFSS module contains one 2A, 250V, fast-blowing fuse (1.25 × 0.25 inch)
to protect the RF components from damage in the event of an electrical overload.
WARNING: Circuit breakers protect the other shelves, cards, and
modules in the NPM. Removing the fuses does not disable power to the
circuit breakers, PDP, shelves, or modules.
Fuse Feed
Fuse F1 +24V DC feed 1 (left terminal)
Fuse F2 +24V DC feed 2 (middle terminal)
Fuse F3 +24V DC feed 3 (right terminal)
Table 2.12 PDP Fuse Connections