Product details
| Part number | 4902-9721 |
|---|---|
| Description | Speaker 25V/70VRMS White Ceiling Truea |
| Category | Notification Appliances / Conventional Horns, Strobes & Speakers |
| System | Simplex TrueAlarm detectors and TrueAlert appliances |
| Works with | Supervised notification appliance circuits, 25 VRMS or 70.7 VRMS |
| Approvals | UL listed to UL 1480; CSFM (7320-0026:242); FM approved; MEA (NYC) acceptance |
| Availability | In stock in Riyadh |
| Support | Selection, compatibility and programming help from our engineers |
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About the 4902-9721
The 4902-9721 is a round, off-white fire alarm speaker with no lettering, for flush mounting on a ceiling or wall. It has a 4 in. (102 mm) cone and a multi-tapped transformer for 25 VRMS or 70.7 VRMS input, with taps of 1/4 W, 1/2 W, 1 W or 2 W. It reproduces tones and voice messages and can also be used for background music.
This is the UL model; the ULC listed version carries the CA suffix (4902-9721CA).
Specifications
| Input voltage | 25 VRMS or 70.7 VRMS |
|---|---|
| Power taps | 1/4 W, 1/2 W, 1 W, and 2 W |
| Sound output at 10 ft (~3 m), UL 1480 reverberant | 79 dBA (1/4 W), 82 dBA (1/2 W), 85 dBA (1 W), 88 dBA (2 W) |
| Frequency response, fire alarm | 400 Hz to 4000 Hz |
| Housing dimensions | 7 1/2 in. diameter, 1/2 in. D or 191 mm x 13 mm |
| Depth into box | 2 3/4 in. or 70 mm |
| Mounting | 4 in. square outlet box, 1 1/2 in. deep with 1 1/2 in. deep box extension |
| Temperature range | 32°F to 100°F or 0°C to 38°C |
Used with
- 2905-9946 – Tile bridge for 4902-9721 speaker
From Simplex datasheet S4902-0003. The datasheet, UL listing and installation manual can be downloaded under Documents above.
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