3Com 3C63400-3AC-C - PathBuilder S700 Switch Reference Manual page 64

50 C 2: I
HAPTER NSTALLATION
Connecting the Visual Alarm Table 20 lists the pinouts for the visual alarm
connector. Connect your alarm equipment to the appropriate pins, as determined
by the type of alarm equipment you are using. For example, if the alarm
equipment you are using requires an Open state when there is no alarm, connect
to pins 1 and 2 for the minor alarm, 7 and 8 for the major alarm, and 4 and 5 for
the critical alarm. When the MCPU detects a minor, major, or critical alarm, the
appropriate LED illuminates. To turn off the LED, you must clear the alarm.
Table 20 Visual Alarm Connector Pinouts
PIN 1 Minor Alarm Return (Common)
PIN 6 Minor Alarm Normally Closed (NC)
PIN 2 Minor Alarm Normally Open (NO)
PIN 7 Major Alarm Return (Common)
PIN 3 Major Alarm Normally Closed (NC)
PIN 8 Major Alarm Normally Open (NO)
PIN 4 Critical Alarm Return (Common)
PIN 9 Critical Alarm Normally Closed (NC)
PIN 5 Critical Alarm Normally Open (NO)
Connecting the Audible Alarm Table 21 lists the pinouts for the audible alarm
connector. Connect your alarm equipment to the appropriate pins, as determined
by the type of alarm equipment you are using. For example, if the alarm
equipment you are using requires an Open state when there is no alarm, connect
to pins 1 and 2 for the minor alarm, 7 and 8 for the major alarm, and 4 and 5 for
the critical alarm. When the MCPU detects a minor, major, or critical alarm, the
alarm rings. To turn off the alarm, press the ACO button on the front of the MCPU
module.
Table 21 Audible Alarm Connector Pinouts
PIN 1 Minor Alarm Return (Common)
PIN 6 Minor Alarm Normally Closed (NC)
PIN 2 Minor Alarm Normally Open (NO)
PIN 7 Major Alarm Return (Common)
PIN 3 Major Alarm Normally Closed (NC)
PIN 8 Major Alarm Normally Open (NO)
PIN 4 Critical Alarm Return (Common)
PIN 9 Critical Alarm Normally Closed (NC)
PIN 5 Critical Alarm Normally Open (NO)