LFHNKR3 Cooper Wheelock Exceder LED3 520 Hz Low Frequency Sounders

Eaton has developed the Wheelock Exceder LED3 Low Frequency Sounder Strobes (LFHSK3) and Sounders (LFHNK3) to meet the National Fire Protection Association (NFPA) low frequency sounder requirements for sleeping rooms - NFPA 72 for fire alarm and NFPA 720 for Carbon Monoxide (CO) alarm. In a single device, the Exceder LED Low Frequency Sounders can provide alarm signals for dual applications - T3 (Fire) and T4 (CO) tones. It is the first product in the industry to be listed to the audibility requirements of UL 2034 for CO applications.

Specifications

Physical

• Material - Red or white textured UV stabilized, colored impregnated engineered plastic. Exceeds 94V-0 UL flammability rating
• Weight - 1.10 lbs.
• Lens - Light Emitting Diode (LED) in a rugged Lexan lens
• Dimensions - 6.23"H x 4.69" W x 1.77" D (with LFTP trim plate)
• Operating Temperature - Indoor: 32°F to 122°F (0°C to 50°C) and maximum humidity of 93%

Mounting & Wire Connections

• Mounting (indoor only) - Wall-mount applications for sounder strobe (LFHSK3); Wall and ceiling-mount applications for the sounder only model (LFHNK3). Trim plate for single-gang backbox included in all LFHNK3/LFHSK3 models; Exceder LSPKBB backboxes and 4" square backboxes
• Wire Connections - #12 through #18 AWG

Power & General

• Operating voltage - 24 VDC: 16 - 33 VDC
• Strobe Output Rating - UL 1971: 110 candela output
• Strobe Flash Rate - Strobes are designed to flash at 1 flash per second
• Synchronization Models - Strobes can be synchronized with Wheelock's DSM Sync Modules, PS Power Supplies, using Wheelock patented sync protocol
• Temporal Audible Pattern - Continuous, Code 3, Code 4 or Code 3/Code 4 Sync Control. The Code 3 temporal pattern (1/2 second on, 1/2 second off, 1/2 second on, 1/2 second off, 1/2 second on, 1-1/2 off and re at) is specified by ANSI and NFPA 72 for standard emergency evacuation signaling. The Code 4 temporal pattern (four cycles of 100 milliseconds ± 10 percent "on" and 100 milliseconds ± 10 percent "off," followed by 5 seconds ± 10 percent "off) is specified by NFPA 720.

LFHNKR3 Specifications PDF