Autocall A4906-9131 — TrueAlert weatherproof wall mount horn strobe, red housing with white FIRE lettering and a multi-candela strobe.
This appliance carries two visible listings rather than one, and the difference matters at design time: under UL 1971 the strobe is selectable across three candela values over an indoor temperature band, while under UL 1638 it is fixed at one value over a wider outdoor band.
- Regulated 24 VDC, absolute range 16 to 33 VDC; 1 Hz flash, up to 24 synchronized strobes per NAC
- UL 1971 rating 32 to 122 °F, selectable 15, 60 or 75 cd
- UL 1638 rating -31 to 150 °F at 75 cd, the WP75 factory setting
- Horn output is a 2400 to 3700 Hz sweep modulated at 120 Hz
- UL 464 reverberant, steady, at 10 ft: 80, 83, 86 dBA at 16, 24, 33 VDC
- Maximum RMS current 91 mA at 15 cd, 204 mA at 60 cd, 249 mA at 75 cd
A weatherproof box is required and ordered separately: A49WPBB-AVVOWR red or A49WPBB-AVVOWW white. A4906-9132 is the same horn strobe in white with red lettering; A4906-9105 and A4906-9106 are visible-only; A4906-9143 is the ULC version, whose candela set is 5, 20 or 30 cd.
