1-1
 
The 4004 Fire Alarm Control Panel (FACP) is a general alarm, battery-backed, 
electrically supervised system capable of operating two Notification Appliance 
Circuits (NACs) and monitoring two Initiating Device Circuits (IDCs) with 
expansion capability of up to 8-IDCs.  The 4004 FACP is capable of 
automatically controlling auxiliary equipment such as fire doors and fans during 
a fire condition.  The 4004 provide audible and visible indications during Fire 
Alarm, Supervisory, or Trouble conditions.  If any of these conditions occur, the 
system sounds the appropriate notification appliance(s) and flashes the 
applicable display (the red “FIRE ALARM ZONE” display for fire alarm zone 
indication, the yellow “TROUBLE” display for trouble indication, and the 
yellow LED for “Supervisory” operation). 
•  Acknowledging the alarm immediately silences the panel audible and 
causes the display to illuminate steadily. 
•  Pressing the “SYSTEM RESET” key resets the system and causes the 
seven-segment alarm and trouble displays to indicate a dash (-) for 
15-seconds; following the dash, the displays go out on a successful 
system reset or indicate an existing Alarm, Supervisory, or Trouble 
Condition(s). 
The 4004 system has “Re-sound” capability.  Following a Supervisory alarm or 
trouble acknowledgment, another circuit goes into alarm, supervisory, or trouble; 
the applicable display flashes; and the signals again operate.  Once in alarm, the 
system remains in alarm until the device that initiated the alarm is restored to 
normal and the panel is reset. 
The FACP constantly checks for electrical troubles (power loss, battery 
problems, wiring faults, etc.).  If a Trouble occurs, the tone-alert sounds and the 
yellow trouble display indicate the type of trouble(s) in the system.  Another 
selectable 4004 feature is an active status reminder, if there is an acknowledged 
alarm, supervisory, or trouble condition in the system, the tone-alert sounds 
every eight hours for five seconds. 
Figure 1 illustrates the physical layout of the cards and the power-limited and 
non power-limited wiring areas within the 4004.  Printed circuit boards are 
joined together in the system by board-to-board connectors or via a wiring 
harness connection. 
 
 
 
 
 
 
 
 
 
 
 
Chapter 1  
4004 System Overview 
Overview