8
Fan monitor
The Model 6103 monitors the fan tray tachometer signals. If a fan tray
alarm signal is detected, the alarm card will illuminate the FAN LED. The
Model 6103 will also illuminate either the MIN or the MAJ LED depend-
ing on the severity of the alarm condition.
Temperature Monitor
The Model 6103 monitors the temperature inside the chassis on the
alarm card. If a temperature alarm is detected, the alarm card will illumi-
nate the TEMP LED and the MAJ LED.
Power Supply Monitor
The Model 6103 monitors the chassis power supplies. If a power supply
alarm is detected, the alarm card will illuminate the PS LED. The Model
6103 will also illuminate either the MIN or the MAJ LED depending on
the severity of the alarm condition.
3.2
ALARM CONDITIONS
The following section describes the conditions necessary to set an alarm
in the Model 6103. Fan, Temperature, and power alarm conditions are
internally set. System alarm conditions are set in the Patton
Model 3096RC or 2616RC.
Fan Tray Alarm Conditions
The Model 6103 monitors the tachometer signals from the fans in the chas-
sis. The following describes the conditions necessary to set a fan alarm.
Alarm
Condition
Fan Minor Alarm
One fan has dropped to 1/2
speed
Fan Major Alarm
• Two or more fans have dropped to 1/2
speed
• One or more fans have dropped to 3/8 speed