Addressable Fire Alarm Control System

The IntelliKnight System is the easy way to make the most of fire alarm technology.

5820XL is an intelligent addressable fire alarm control panel (FACP). The basic 5820XL system can be expanded by adding modules such as 5860 remote annunciator, 5815XL signalling line circuit expander, 5824 serial/parallel printer interface module (for printing system reports), and 5895XL intelligent power module. 5820XL supports SD or SK devices. 5820XL also features a powerful built-in dual line fire communicator that allows for reporting of all system activity to a remote monitoring location.


  • Built in support for 99 SK detectors and 99 SK modules,
    expandable to 396 SK detectors and 396 SK modules using
    System Sensor protocol
  • Built in support for 127 SD devices, expandable to 508 SD
    devices using the SD protocol.
  • Uses standard wire—no shielded or twisted pair required
  • Built-in digital communicator
  • Central station reporting by point or by zone
  • Built-in synchronization for appliances from AMSECO®,
    Gentex®, Faraday, System Sensor, and Wheelock®
  • Flexput™ I/O circuits
  • Supports Class B (Style 4) and Class A (Style 6) configuration
    for SLC, SBUS, and Flexput circuits
  • 13 pre-programmed output cadences (including ANSI-3.41)
    and 4 programmable outputs
  • Built-in annunciator with 80-character LCD display
  • RS-485 bus provides communication to system accessories
  • Built-in RS-232 and USB interface for programming via PC
  • Built-in Form C trouble relay rated at 2.5 amps at 27.4 VDC
  • Improvements in SKSS software deliver five times faster
  • Two built-in Form C programmable relays rated at 2.5 amps
    at 27.4 VDC
  • Plex-1 door option combines a dead front cabinet door with a
    clear window, limiting access to the panel while providing
    single button operation of the reset and silence functions
  • 6 amp power supply and maximum charging capacity of 35 amp hours (An
    additional cabinet enclosure is required for batteries in excess of 18 amp hours)
  • Programmable date setting for Daylight
    Saving Time


The 5820XL can be surface or flush mounted


The 5820XL signal line circuit (SLC) supports multiple device types of the same protocol:

  • SK (System Sensor)
  • SD
  • You cannot mix SD and SK SLC devices on a FACP


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