SD365 Series - Addressable Photoelectric Smoke Detectors

Nov 2, 2026

SD365 Series addressable photoelectric smoke detectors and intelligent plug-in devices provide sleek design and enhanced optical sensing for smoke detection across a wide range of combustion sources. The system supports Fire•Lite addressable fire alarm control panels with device address setting, local LED indication, polling communication, and alarm latching. Built-in tamper resistance, remote panel testing, walk testing with address display, and factory preset sensitivity support UL 268 7th Edition compliance, while sensitivity tests can be printed for maintenance records.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages3

Reading Time8 min

AccessFree to download

Features

SLC LOOP

Addressing

Architecture

Operation

Mechanicals

Options

Installation

Wiring and mounting notes

Construction

Product Line Information

SD365 variants

Intelligent bases

Operation

Sensitivity testing

SD365 Series Addressable Photoelectric Smoke Detectors Addressable Devices The Fire•Lite® Alarms SD365(A), SD365R(A), and SD365HT(A) intelligent plug-in smoke detectors are designed for both performance and aesthetics, and are direct replacements for the SD355 Series. A new modern, sleek, contemporary design and enhanced optical sensing chamber is engineered to sense smoke produced by a wide range of combustion sources in accordance with more stringent code standards. Exclusively for use with Fire•Lite’s addressable fire alarm control panels, the SD365(A) Series point ID capability allows each detector’s address to be set with rotary, decimal address switches, providing exact detector location for emergency personnel to quickly locate a fire during its early stages, potentially saving precious rescue time while also reducing property damage. Two LEDs on each sensor light to provide a local, visible sensor indication. The SD365(A) Series also offers 135°F (57°C) fixed temperature thermal sensing on the SD365T(A) and a remote test capable detector on the SD365R(A) for use with DNR(A)/DNRW duct smoke detector housings. Features SLC LOOP: • Two-wire SLC loop connection • Unit uses base for wiring • Compatible with LiteSpeed™ and CLIP protocol systems • Stable communication technique with noise immunity ADDRESSING: • Addressable by device • Rotary, decimal addressing (Refer to the Fire•Lite panel manuals for device capacity.) ARCHITECTURE: • Sleek, low-profile, stylish design • Unique single-source design to respond quickly and dependably to a broad range of fires • Integral communications and built-in device-type identification • Built-in tamper resistant feature • Remote test feature from the panel • Walk test with address display (an address on 121 will blink the detector LED: 12-[pause]-1(LiteSpeed systems only) • Built-in functional test switch activated by external magnet • Removable cover and insect-resistant screen for simple field cleaning • Expanded color options OPERATION: • Designed to meet UL 268 7th Edition • Factory preset at 1.5% nominal sensitivity for panel alarm threshold level • LED “blinks” when the unit is polled (communicating with the fire panel) and latches in alarm. • Low standby current MECHANICALS: • Sealed against back pressure • SEMS screws for wiring of the separate base • Designed for direct-surface or electrical-box mounting • Plugs into separate base for ease of installation and maintenance • Separate base allows interchange of photoelectric, ionization and thermal sensors OPTIONS: • Optional relay, isolator, and sounder bases Installation SD365 Series plug-in intelligent smoke detectors use a detachable base to simplify installation, service and maintenance. Installation instructions are shipped with each detector. Mount detector base (all base types) on an electrical backbox which is at least 1.5" (3.81 cm) deep. For a chart of compatible junction boxes, see DF-60059. NOTE: Because of the inherent supervision provided by the SLC loop, end-of-line resistors are not required. Wiring “T-taps” or branches are permitted for Class “B” wiring only. When using relay or sounder bases, consult the I300(A) installation sheet I56-3626 for device limitations between isolator modules and isolator bases. Construction These detectors are constructed of fire-resistant plastic. The SD365 Series plug-in intelligent smoke detectors are designed to commercial standards and offer an attractive appearance. Operation Each SD365 Series detector uses one of the panel’s addresses (total limit is panel dependent) on the Fire•Lite Signaling Line Circuit (SLC) . It responds to regular polls from the control panel and reports its type and the status. If it receives a test command from the panel (or a local magnet test), it stimulates its electronics and reports an alarm. It blinks its LEDs when polled and turns the LEDs on when comman

FAQs

What makes SD365 Series detectors suitable for early fire detection?

They use enhanced optical sensing to detect smoke from a wide range of combustion sources and support addressable communication with the Fire•Lite control panel for timely alarm reporting.

How are detector addresses set and indicated in the SD365 Series?

Each detector address can be set using rotary, decimal address switches, and the detector LEDs provide local visible indication, including blinking when polled.

What testing and maintenance capabilities are supported?

The series includes remote test from the panel and walk test with address display, plus functional test switching with an external magnet. Sensitivity testing is supported per NFPA 72 requirements and results can be printed for records.

Nov 2, 2026

Uploaded by Olivia Brown