Description
Fire-Lite SD365 Intelligent Addressable Detector Head
The Fire-Lite SD365 Intelligent Addressable Detector Head provides advanced optical fire detection for compatible Fire-Lite addressable fire alarm systems. It features an enhanced optical sensing chamber, LiteSpeed communication, and a modern low-profile design. In addition, its rotary addressing and dual LED indicators support convenient installation, monitoring, and maintenance.
Designed for professional fire alarm applications, this white detector head connects to a compatible mounting base and communicates with the fire alarm control panel through the Signaling Line Circuit.
Intelligent Optical Fire Detection
The Fire-Lite SD365 uses an enhanced optical sensing chamber to monitor airborne particles associated with developing fire conditions.
As particles enter the chamber, they change the light-scattering pattern inside the sensing assembly. The detector evaluates these changes and communicates its readings to the connected control panel.
Therefore, the fire alarm system can identify an alarm condition and initiate the programmed response.
This technology provides early fire detection for compatible commercial and institutional installations.
LiteSpeed Communication Technology
The detector supports Fire-Lite’s LiteSpeed communication protocol.
LiteSpeed provides rapid communication between compatible addressable devices and the fire alarm control panel.
As a result, the system can monitor individual detector conditions and identify activated locations.
However, the standard white SD365 does not support CLIP communication.
Installers must confirm that the selected fire alarm control panel supports LiteSpeed before installation.
Rotary Decimal Addressing
Each detector head includes rotary decimal address switches.
Installers assign a unique device address according to the approved fire alarm system design.
Compatible control panels support addresses up to 159, depending on system capacity.
Consequently, the control panel can identify the specific detector location during alarm and maintenance conditions.
Individual addressing also simplifies troubleshooting and routine inspection.
Dual Multicolor LED Indicators
The detector includes two visible LED indicators.
Compatible Fire-Lite control panels can control the indicators using red, green, or amber status colors.
Depending on the programmed system configuration, the LEDs can blink, remain illuminated, or turn off.
Therefore, technicians can recognize communication and alarm conditions directly at the detector.
An optional RA100Z remote annunciator can provide additional visual indication at an approved remote location.
Low-Profile Plug-In Construction
The Fire-Lite SD365 features a white, low-profile housing with a removable detector head.
Its plug-in construction allows technicians to attach the device to a compatible mounting base.
Moreover, the separate base simplifies servicing and replacement without disconnecting the existing base wiring.
The mounting base is not included unless the seller specifically states otherwise.
Key Features
- Intelligent addressable optical detector head
- Fire-Lite SD365 Series
- White low-profile housing
- Enhanced optical sensing chamber
- LiteSpeed communication protocol
- Rotary decimal address switches
- Individual device identification
- Dual multicolor LED indicators
- Compatible panel-controlled status indication
- Optional RA100Z remote LED annunciator
- Built-in magnetic functional testing
- Removable sensing chamber cover
- Insect-resistant chamber screen
- Tamper-resistant mounting option
- Low standby current
- 15–32 VDC operating voltage
- Compatible detachable mounting bases
- Designed for professional fire alarm installations
Magnetic Functional Testing
The detector supports functional testing using an approved test magnet.
During inspection, a qualified technician places the magnet at the designated test location.
The detector then initiates a test response through the connected fire alarm control panel.
Consequently, maintenance personnel can verify detector communication and alarm operation.
However, testing must follow Fire-Lite instructions and applicable fire alarm maintenance requirements.
Maintenance and Cleaning
The sensing chamber includes a removable cover and insect-resistant screen.
These components help technicians access the chamber during approved cleaning procedures.
Over time, dust and airborne contaminants can affect optical sensing performance.
Therefore, periodic inspection and maintenance are important for reliable operation.
Qualified personnel should follow the manufacturer’s cleaning and testing instructions.
Electrical Specifications
The detector operates from 15 to 32 VDC through a compatible signaling line circuit.
Its documented operating current is approximately 200 microamps at 24 VDC under specified communication conditions.
The maximum alarm current is 2 mA at 24 VDC with the red LED illuminated.
In addition, the maximum current reaches 4.5 mA at 24 VDC with the amber LED illuminated.
These electrical characteristics support compatible Fire-Lite addressable systems.
Compatible Mounting Bases
The detector supports selected Fire-Lite mounting bases.
For example, the B300-6 provides a white six-inch mounting option. Meanwhile, the B501-WHITE offers a compact four-inch configuration.
Additional compatible relay, isolator, and sounder bases are available for approved applications.
However, installers must verify the exact base and control panel compatibility before installation.
Environmental Requirements
The detector operates in temperatures from 32°F to 122°F (0°C to 50°C).
It supports relative humidity from 10% to 93%, non-condensing.
In addition, the manufacturer specifies an air velocity range of 0 to 4,000 feet per minute.
These limits help determine suitable installation environments.
Typical Applications
This intelligent detector head supports compatible commercial and institutional fire alarm systems.
Typical applications include offices, schools, hotels, healthcare facilities, retail buildings, warehouses, and other approved locations.
Its addressable communication and removable construction also make it suitable for maintaining existing Fire-Lite systems.
Installation and Compatibility
Before installation, verify the fire alarm control panel, LiteSpeed protocol configuration, device address, and mounting base.
Also, confirm the environmental conditions and applicable safety requirements.
Qualified fire alarm professionals should install, configure, and test the detector according to Fire-Lite instructions and applicable codes.
Overall, the Fire-Lite SD365 combines optical fire detection, LiteSpeed communication, rotary addressing, and convenient maintenance features in one low-profile device. It provides a practical solution for compatible addressable fire alarm installations.





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