SMART Embedded Computing 6806800V18A, Installation And Use Manual

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154 AXP1440-C07 Installation and Use (6806800V18A)
Shelf Management Module
Shelf Management Module
hardware to recognize it as the Active SAM1620-D. In response, the hardware
must set the ACTIVE bit. When the formerly active SAM1620-D restarts it
successfully establishes the connection with the current SAM1620-D and starts to
operate in the backup mode.
7.5 Alarm Functionality
The SAM1620-D provides Telco alarm functionality with the following components:

Alarm cutoff push button

DB15 alarm contacts

Alarm LEDs
7.5.1 Cutoff Push Button
The SAM1620-D provides an alarm cutoff function with the front panel push button switch
located on the ADP1440-D. This push button activates the alarm cutoff (ACO) state. When
ACO is activated, the active alarm LED blinks and all of the alarm relays are deactivated.
This button does not clear alarms. Refer to
Figure 7-2 on page 144
for the location of the
alarm cutoff push button switch.
7.5.2 Alarm LEDs
These LEDs are used to indicate the presence of the critical, major, and minor alarms.
When a LED is lit, the respective alarm is active. A blinking LED signals an alarm cut-off
state which is initiated by pressing the alarm cut-off button when an alarm is active.
7.5.3 Alarm Interface
The SAM1620-D provides a front-panel alarm connector, which is a standard DB-15
connector with the following pin assignments:
Table 7-11 Hot Swap Interface Pin Out
Pin Description
1 Minor Alarm Reset +
2 Minor Alarm Reset -
3 Major Alarm Reset +
4 Major Alarm Reset -