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ADCP-80-575 • Issue 2 • December 2006
Page 7
© 2006, ADC Telecommunications, Inc.
Figure 3. Block Diagram of GMT-KLM Bus
– Initially, if there is no input power to the A or B bus, or if there is no fuse placed in the
KLM fuse holder, the LED will be unlit (no green or red light).
– The first time a KLM fuse is installed in the fuse holder, the LED will turn to green to
indicate that the position has power available for the output terminal for that fuse
position. It will remain green until there is a fuse failure or until a fuse is removed
from that fuse holder.
– At the time of a fuse failure, or if the fuse is removed, the LED will turn red and
activate an alarm. When the failed fuse is replaced, the new fuse will act as described
for the initial turn-up, turning green to indicate a power available condition. At the
same time, the new fuse will clear the alarm.
BATT RTN
1
2
3
4
RED
KLM
BATT RTN
1
2
3
4
RED
GMT
BATT
RTN
GREEN
POWER A
ALARM
MONITOR
BATT RTN
1
2
3
4
RED
KLM
BATT RTN
1
2
3
4
RED
GMT
BATT
RTN
GREEN
POWER B
ALARM
MONITOR
KLM GMT
NO C NC
ALARM
AUDIO
VISUAL
REMOTE
20827-A