4098-9791, 4-Wire Addressable Smoke Detector Base
What Is the 4098-9791?
The Simplex 4098-9791 is a specialty sensor base that bridges conventional 4-wire smoke detector technology with the Simplex TrueAlarm addressable signaling line circuit. Standard TrueAlarm sensor heads use a 2-wire SLC connection. The 4098-9791 provides a 4-wire interface at the base level, allowing a conventional 4-wire smoke detector to be connected to an IDNet or MAPNET II addressable panel and report as a fully addressed individual device.
This base is most valuable in phased renovation projects where existing 4-wire conventional detectors are being retained while the rest of the system is upgraded to addressable technology, or in specialized applications where a specific 4-wire detector technology must interface with the Simplex addressable system.
Key Features
- 4-Wire Interface: Accepts 4-wire conventional smoke detector heads and connects them to the Simplex TrueAlarm IDNet/MAPNET II addressable SLC.
- Addressable Reporting: The 4-wire detector reports as a full addressable point with individual identification at the Simplex panel.
- Protocol: IDNet and MAPNET II Simplex 4100ES, 4010ES, 4007ES, 4008.
- Retrofit Value: Enables phased upgrades where conventional 4-wire detectors are retained alongside newer TrueAlarm 2-wire addressable devices.
- Mounting: 4-inch octagonal or square electrical box.
Applications – Where This Base Is Used
- Phased renovation projects retaining existing 4-wire conventional detectors while upgrading to addressable panel
- Hybrid systems where cost constraints require reuse of existing conventional detector inventory
- Specialized areas requiring 4-wire detector technologies not available in TrueAlarm 2-wire versions
- Duct detector housings that output 4-wire conventional signals requiring addressable SLC integration
Benefits
Installations that need more than a simple sensor base for example, a single location that must both drive a remote alarm indicator and trigger an auxiliary relay are exactly what the 4098-9791 is built for.
Its 4-wire layout lets integrators combine supervised relay control for safety-critical auxiliaries (like door holders or fan shutdown) with a visible remote LED for guard-patrol verification, without stacking extra hardware.
Because addressing is stored in the base, technicians replace sensor heads during routine maintenance without touching the panel configuration, which dramatically cuts service windows.
It’s especially useful in mixed-tenant buildings where a single base must handle both annunciation and auxiliary switching duties.
Why Source From QuickShipFire?
The 4098-9791 is a specialty base that many distributors don’t keep in stock. QuickShipFire maintains inventory of this and other hard-to-find Simplex TrueAlarm components. Same-day shipping before 2:30 PM PST. Call (833) 747-7845 if you have questions about 4-wire-to-addressable interfacing for your specific system configuration.
Compatible Sensor Heads
| Sensor Model | Sensor Type | Notes |
| 4-wire conventional smoke detectors | Conventional photoelectric / ionization | Verify specific detector model compatibility |
| Note | Standard 2-wire TrueAlarm heads | Use 4098-9789 or 4098-9792 for 2-wire heads – NOT this base |
| INSTALLATION & WIRING NOTES |
Installation requires both SLC wiring for the addressable connection and a 4-wire power/signal circuit for the conventional detector.
- Mount the 4-inch electrical box at the detector location.
- Run the Simplex SLC wiring (2-wire) to the box and connect to base SLC terminals.
- Run the 4-wire power and signal circuit from the panel or power supply to the base 4-wire terminals.
- Mount the 4098-9791 base to the electrical box.
- Install the 4-wire conventional detector head per the detector manufacturer’s installation guide.
- At the panel, program the 4098-9791 address and configure device type for the connected 4-wire detector.
- Test activation and verify correct addressable reporting at the panel.
⚠ IMPORTANT : Verify the voltage and current requirements of the 4-wire conventional detector match the 4098-9791 base’s power specifications before energizing. Mismatched power supply can damage both the detector and the base.