Siemens SC-LFSS-WW-F — Acend series low-frequency sounder-strobe, wall mount, white, FIRE lettering (part number S54361-F22-A2).
The second S in LFSS is the strobe: SC-LFS models are sounder only, SC-LFSS models add a lens-based LED strobe. The trailing letter is faceplate lettering, where F reads FIRE and N reads NO LETTERING, and WW is wall mount in white. Siemens rates the sounder as a low-frequency device per UL 464, suitable for sleeping areas under NFPA 72.
- Six field-selectable candela settings: 15, 30, 75, 110, 135 and 185 cd
- 80 dBA on high and 77 dBA on low, reverberant per UL 464 across 16 to 33 VDC
- Current on high runs 101 mA at 15 cd to 223 mA at 185 cd; on low, 46 to 172 mA
- Four tone patterns: Continuous, T3, T4 and T4 low power
- UL 1971, UL 1638, UL 464; ULC 525, ULC 526; Special Application 16 to 33 VDC
- Indoor dry only, 32° to 122°F (0° to 50°C); terminals take 12 to 18 AWG
The siblings differ by a single character. SC-LFS-WW-N is the same white wall housing with no strobe and no lettering, SC-LFSS-WR-F is the red version, and SC-LFSS-CW-F is the ceiling-mount white FIRE model.
