Output Circuits
24
Document #51073 Rev.A 1/19/99 P/N 51073:A
2.5
Output Circuits
Notification Appliance Circuit
The 411UDAC provides one Style Y (Class B) NAC (Notification Appliance Circuit). The NAC is supervised and
power-limited and is capable of 1.0 amp of current. Note that when coding is selected, the NAC output is not
power-limited. Refer to the Device Compatibility Document for a listing of compatible notification appliances.
Note: The 411UDAC should only be used to supplement host panel NACs.
The NAC may be programmed as follows:
• Silenceable
• Nonsilenceable (waterflow)
• Silence Inhibited (one minute)
• Autosilence (5 to 30 minutes)
FIGURE 2-8:
Notification Appliance Circuit Connections
Style Y (Class B) Notification Appliance Circuit
(supervised and power-limited).
2.2K ohms, ½ watt P/N 27070
Polarized Bell
Polarized Horn
Polarized Horn
Dummy Load NAC circuit with 2.2K ohm, ½ watt
End-of-Line resistor if not being used.
Note: Notification Appliance Circuit
polarity shown in alarm state
411A
NA
C
.CDR
Содержание Fire-Watch 411UDAC
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