UG8000-00 November 2002
Page 1-31
ALARMS CONNECTOR (ALL MODELS)
The ALARMS connector on the back of all router models provides a means of
monitoring the health of various frame parameters as explained below. When a
monitored item fails or is disconnected, an “alarm” is generated through the ALARMS
connector. See Table 1-5 and Figure 1-14 for details.
Alarm Definitions
An “alarm set” or ON condition occurs when the connection between an alarm pin and
Alarm_COM (common) opens. The alarm turns OFF when the connection between
common and the alarm pin closes again.
Table 1-5. Alarm Definitions
PIN SIGNAL DESCRIPTION POSSIBLE CONDITIONS CAUSING THE ALARM
1 and 9 Alarm_COM Common Common connection for all alarm pins.
2 Alarm_1 Major Alarm Indicates missing reference inputs. May also indicate failure of fans,
or over-temperature on any card.
3 Alarm_2 Minor Alarm Alarm_3, or Alarm_4, or Alarm_5, or Alarm_6
4 Alarm_3 Power Supply Missing any main (primary) power supply module.
5 Alarm_4 Video Ref Missing Video Ref 1 or Video Ref 2 (if applicable)
6 Alarm_5 AES Ref or Time
Code Ref
Missing AES reference input (if applicable), time code reference
input (if applicable), or system clock.
7 Alarm_6 Fans or
temperature
Failure of any single fan, or any card over temperature
8 Alarm_7 Control Card
Health
Any control card not “healthy.”
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