Autocall A4901-9859 — white non-addressable mini-horn for SmartSync two-wire notification circuits, 24 VDC.
The mini-horn runs on SmartSync control only: the panel or module sets its tone (temporal, march time or steady) over the same two wires that drive synchronized strobes, so the horn can be silenced while strobes keep flashing. SmartSync is available on 4006, 4007ES Hybrid, 4008, 4010, 4010ES, 4100ES and 4100U panels, 4009 IDNet NAC extenders and the A4905-9938 SmartSync Control Module.
- High/low output switch: 79/68 dBA reverberant per UL 464 at 10 ft; 93/82 dBA anechoic per ULC S525 at 3 m
- Rated 16–33 VDC, 19 mA maximum
- 4 1/2 × 2 3/4 × 1 1/4 in.; single-gang box, flush or surface
- UL 464 and ULC S525 listed; flame-retardant thermoplastic housing
- 32–122 °F; 10–93% RH non-condensing
The red version is A4901-9858; the Simplex-branded counterpart is 4901-9859. UL ratings below 75 dBA are for NFPA 72 private mode.
