ASBL | Hochiki's UL Approved Fire Detection

Low Frequency Sounder Base | UL Addressable Fire Detection

ASBL Description 


ASBL Low-Frequency Sounder Base is designed for use with the Hochiki Addressable Sensors. Each base is to be connected to the Hochiki State-of-the-Art Digital Communications Protocol (DCP) Signaling Line Circuit (SLC).


ASBL provides an audible alarm in the immediate vicinity. Ideal applications are Hotels, Apartments, and Hospitals. The ASBL meets NFPA 72 requirements for Low-Frequency alarms in sleeping areas. Studies have shown that a low-frequency alarm signal is the most effective at waking people with mild to moderate hearing loss. The


ASBL is designed for installation in sleeping areas, such as bedrooms, dorm rooms, hotel rooms, patient rooms, etc. The operation and supervision of the ASBL are fully managed by the compatible Fire Alarm Control Panel (FACP). The ASBL has a highly configurable programming algorithm that allows the user to set up groups of bases for the synchronization of modulation tones. Each device has 16 states that are programmed with the desired sound pattern to be used for each state.

ASBL Features & Specifications 


- UL269 and UL464 Listed

- Programmable evacuation codes - Continuous, Temporal Code 3 (Temporal Code 4 with CO detection)

- 520Hz Low frequency alarm signal meets NFPA requirements for sleeping areas

- Separate addresses range (128 - 254) for easy Cause and Effect programming

- Programmable activation by General Alarm, by zone and/ or by individual address


Operating Voltage: 17 - 41 VDC
SLC Current Consumption: 154μA (Standby and Alarm)
Auxiliary Power 16 - 31 VDC
Auxiliary Current Consumption: 2.8mA (Standby)

Operating Temperature Range: 32°F (0°C) - 122°F (50°C)
Relative Humidity: 93% RH Non-Condensing
Base Diameter: 6.6”
Base Height: 3.1”


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