Installation Manual

Circuits
12
411UDAC Document #51073 Rev. D 12/09/2008 P/N 51073:D
1.3 Circuits
The 411UDAC circuit board utilizes surface mount technology and contains a MicroController Unit (MCU), dual
modular phone line jacks, piezo sounder, two sockets for optional programmable relays and connectors for input, out-
put and power wiring. A piezo silence switch and reset switch are provided on the membrane panel which plugs into
connector J7 on the main circuit board.
1.3.1 Channels/Inputs
Four input channels are provided on the 411UDAC. The 411UDAC can be used to monitor a host FACP (Fire
Alarm Control Panel) in Slave Mode or as a stand-alone FAC (Fire Alarm Communicator). Each input can be
programmed to monitor the following conditions:
fire alarm activation
2-wire smoke (channels 1 & 3 only)
pull station
normally open contact device
waterflow
trouble activation
fire supervisory activation
1.3.2 Notification Appliance Circuit
One Style B NAC (Notification Appliance Circuit) requiring a 2.2K ohm End-of-Line resistor. This NAC can
only be used to supplement host panel NACs.
1.3.3 Output Circuits
Modular jacks are used to interface the primary and secondary phone lines to the public telephone network.
Phone lines are fully supervised at all times (if communication is enabled).
12 volt resettable special application power output (200 mA)
12 volt battery charger will charge up to 14 AH batteries
1.3.4 Auxiliary Relays
Two dry Form-C relays (P/N: 411RK), with contacts rated for 2.0 amps @ 30 VDC (resistive) or 0.5 amps @ 30
VAC (resistive), are installed on the main circuit board. Each relay is programmable for:
Alarm
Fire supervisory - latching
Fire supervisory - autoresettable
Host panel trouble
DACT trouble
Total communications failure
1.3.5 Earth Ground
Connect a separate earth ground wire to ground stud in backbox for transient protection (refer to Figure 2-4 on
page 21 for location of stud).