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ADCP-80-575 • Issue 2 • December 2006
Page 11
© 2006, ADC Telecommunications, Inc.
alarm indicator is off when all fuses in the fuse holder module are operational. Loss of power to
a bus will not cause the fuse alarm indicators corresponding to that bus to be lighted. For GMT
fuses, there are four or ten fuses per fuse holder with a single fuse alarm indicator for the entire
set of fuses. For TPA fuses, there is one fuse holder per fuse and, therefore, a fuse alarm
indicator for each fuse.
KLM fuse holders have a two-color alarm indicator (green/red LED). The LED is green when a
good fuse is present and receiving power. The LED is red when a fuse is blown or removed. If a
fuse holder is present but no fuse, the LED may be either red or unlit depending on operator
intervention (see Section 1.7 on Page 6).
1.16 Power-On Indicator
An optional visual power-on indicator (green LED) for each power bus is mounted near the
center of fuse platform front panel. If present, the LED, when lighted, indicates that power is
being applied to the bus input connectors. An unlighted LED indicates that power is not being
applied. The power-on indicator LED can be replaced in the field.
1.17 Fused Equipment Designation Card and Holder
Two fuse designation cards, shown in Figure 4, and a card holder with a clear plastic cover are
provided with the fuse platform. The card holder may be attached to either the fuse platform, the
fuse platform mounting brackets, the rack, or a suitable surface close to the fuse platform. One
of the cards may be filled out with circuit information for each of the circuits and inserted in the
card holder. The card holder has a pressure-sensitive adhesive backing for attachment.
Additional fused equipment designation cards, card holders, and plastic covers can be ordered
separately if required.
Figure 4. Fuse Designation Cards
18866-A
1.60 IN.
(4.06 CM)
2.36 IN.
(5.99 CM)