Audible Only Notification Appliances, Indoor Ceiling Mount Electronic Horns 49AO

49AO Ceiling-Mount Audible Notification Appliance

The 49AO ceiling-mount audible notification appliance is an audible-only device, individually addressable, operating entirely through a two-wire IDNAC SLC loop from the Simplex control panel. The system uses a regulated 29 VDC supply, ensuring efficient operation both in normal mode and on backup power, while reducing current consumption and improving wiring efficiency.

Key Features

• Individually addressed control.

• Regulated 29 VDC power from IDNAC with low current consumption.

• Supports T-tap for Class B wiring, reducing cable and installation costs.

• Integrated Self-Test: device automatically checks horn function and reports status to the control panel.

• Multiple horn tone patterns: Temporal Code 3, March Time (20/60/120 bpm), Continuous, Temporal Code 4.

• Two sound output levels (High/Low), ~6 dBA difference.

• Supervision LED and Magnet Test for quick local testing.

• Flame-retardant plastic housing, multiple color/label options (red/white, FIRE, ALERT, FEU, etc.).

• Backward compatible with legacy TrueAlert systems.

Technical Specifications

Electrical & Load

• Operating voltage: 23–30 VDC (standard), compatible with 17 VDC for legacy systems.

• Current draw: max 18 mA @ 17V or 23V.

• Supervisory current: 0.8 mA (1 unit load).

• Max SLC capacity: 127 devices (139 unit loads).

Acoustics

• Frequency range: 2400–3700 Hz, 120 Hz modulation.

• Sound output @10 ft (3 m):

  • @23V – Steady/High: 89 dBA (UL), 97 dBA (ULC).

  • @23V – Steady/Low: 83 dBA (UL), 92.5 dBA (ULC).

• Sound coverage angle: horizontal ±45° @ -3 dBA; vertical +45°/-35° @ -3 dBA.

Environmental

• Operating temperature: 0–49 °C.

• Humidity: 10–93% non-condensing.

Mechanical & Installation

• Dimensions: 180 × 180 × 32 mm.

• Mounts to a standard 4-inch square electrical box.

• Wiring: 18–12 AWG, supports in/out wiring.

• Max wiring distance:

  • Class B T-tap: 10,000 ft (3048 m).

  • To last device: 4000 ft (1219 m).

Main Device (Audible-Only Appliance – cover sold separately)

• 49AO-APPLC – 49AO horn (cover required, ordered separately).

• 49AO-APPLC-BA – Same as above, assembled in USA.

Back Box (for surface mounting only, not weatherproof)

• 49WPBB-SOCR – Red.

• 49WPBB-SOCW – White.

Separate Covers (mandatory accessory)