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M120 Multiservice Edge Router Hardware Guide
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Documentation
Power Supply LEDs on the M120 Craft Interface
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Documentation
Alarm Relay Contacts on the M120 Craft Interface
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Documentation
M120 Power Supplies Overview
28
All manuals and user guides at all-guides.com
M120 Flexible PIC Concentrators (FPCs) Overview on page 9
M120 Craft Interface Description on page 23
Maintaining M120 FPCs and CFPCs on page 106
Replacing the M120 Craft Interface on page 129
Each power supply has one LED on the craft interface that indicates its status. The LEDs,
labeled
and
, are located on the lower left of the craft interface under the
0
1
label. Table 13 on page 28 describes the functions of the power supply LEDs.
Table 13: Power Supply LEDs on the M120 Craft Interface
Label
Color
Red
STATUS
Green
M120 AC Power Supply Description on page 29
M120 DC Power Supply Description on page 31
M120 AC Power Supply LEDs on page 30
M120 DC Power Supply LEDs on page 32
M120 Craft Interface Description on page 23
Maintaining the M120 Power Supplies on page 115
Replacing the M120 Craft Interface on page 129
The host interface has two alarm relay contacts for connecting the router to external
alarm devices (see Figure 13 on page 24). Whenever a system condition triggers either
the red or yellow alarm on the craft interface, the alarm relay contacts are also activated.
The alarm relay contacts are located below the Routing Engine ports.
M120 Craft Interface Description on page 23
Maintaining the M120 Power Supplies on page 115
Replacing Alarm Relay Wires on the M120 Craft Interface on page 133
M120 Power Supplies Description on page 29
M120 AC Power Supply Description on page 29
State
Description
On steadily
Power supply has failed.
On steadily
Power supply is functioning normally.
POWER
Copyright © 2010, Juniper Networks, Inc.
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