Manual

14 411UDAC Manual — P/N 51073:E 9/20/2013
Product Description Controls and Indicators
1.4 Controls and Indicators
Front Panel Switch
• Reset Switch - to reset 411UDAC circuits
• Acknowledge/System Silence Switch
– press once to acknowledge alarm or trouble (silence local 411UDAC piezo sounder and
change all flashing LEDs to steady on)
– press a second time and hold for minimum of two seconds to perform a System Signal
Silence (silence Notification Appliance Circuit)
411UDAC Piezo Sounder
• The 411UDAC piezo sounder is used to locally annunciate DACT alarms and troubles. DACT
troubles include input channel open circuit, NAC fault, phone line 1 or 2 voltage fault, phone
number 1 or 2 communication fault and total communication failure. Separate and distinct
sounds are provided for the following conditions:
 alarm - steady On
 trouble - 1 second On and 1 second Off
 supervisory - ½ second On and ½ second Off
Front Panel Indicator
• AC Power - green LED
• Input Active - red LED
• Communication Fail - yellow LED
• System Trouble - yellow LED
• Supervisory - yellow LED
• Battery Trouble - yellow LED
Circuit Board Indicator
• Earth Fault - yellow LED (indicates zero impedance between panel and earth ground)
Figure 1.2 411UDAC Controls and Indicators
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