NOTIFIER B224BI-WH

Product Overview

 System Sensor Select Series detector bases include standard 4" and 6" models and specialty bases: relay, isolator, sounder, and low-frequency sounder. Standard plug-in bases feature screw terminals for power (+/−) and annunciator connections. The 4" base is compact; the 6" base fits larger junction boxes.

Specialty bases use a separate mounting plate for pre-wiring and faster installation.

Isolator bases (B224BI) maintain SLC operation during short circuits by isolating faults and restoring the loop automatically.

Sounder and low-frequency bases meet UL 268/464 and NFPA 72 requirements. Low-frequency bases (520 Hz ±10%) effectively awaken sleeping occupants, including those with hearing loss.

Key Features

• Plug-in base design for quick and secure detector installation
• Relay bases provide Form C contacts with selectable activation delays
• Isolator bases protect the SLC loop during short-circuit fault conditions
• Sounder and low-frequency sounder options meet UL 268, UL 464, and NFPA 72 requirements
• Low-frequency models generate a 520 Hz tone ideal for sleeping areas