System Sensor B114LPBT 24VAC/DC Low-Profile Plug-In Detector Base
Overview
The System Sensor B114LPBT is a 24VAC/DC low-profile plug-in detector base engineered as the mounting and electrical foundation for compatible ionization smoke detectors in conventional fire detection systems. This accessory solves the common installation problem of compact mounting in tight ceiling or wall cavities where standard detector bases create visual or spatial conflicts. The B114LPBT accepts the 400 Series detector cartridges (1400, 1412B, 1424 models) and delivers stable signal transmission to fire control panels without requiring field modifications to wiring or power infrastructure.
Compatibility
The B114LPBT is designed as a direct mount base for System Sensor 400 Series ionization smoke detectors: models 1400 (2-wire), 1412B (4-wire), and 1424 (4-wire). It supports dual-voltage operation at 24VAC or 24VDC, making it compatible with standard fire alarm power supplies and building automation systems that run either AC or DC at 24 volts. The base accepts the twist-on mounting bracket with tamper option included in the detector assembly, ensuring mechanical and electrical alignment across the product family.
Installation Notes
Mount using the integrated twist-on bracket; no additional fasteners are required beyond standard installation hardware for ceiling or wall application. Wiring connects via SEMS screws — no soldering or crimp connectors needed. Ensure 24VAC or 24VDC supply voltage is delivered to the base terminals before inserting the detector cartridge. The low-profile form factor reduces protrusion depth, making it suitable for drop-ceiling or recessed-mounting scenarios. Detector sensitivity testing and field metering per NFPA 72 can be performed after installation using the sensitivity test module (CRT400, sold separately).
What's in the Box
- 1x B114LPBT detector base (24VAC/DC rated)
- 1x twist-on mounting bracket with tamper option
