Aiphone NIR-4BZ Corridor Light with Buzzer
The Aiphone NIR-4BZ is a flush-mounted corridor light with integrated buzzer designed for Aiphone intercom system deployments. It delivers synchronized visual and audible call notification across hallways, corridors, and common areas without requiring separate indicator devices. Constructed from fire-resistant ABS plastic and rated UL Listed (via the IS-PU-UL power supply), the NIR-4BZ mounts directly into standard 2-gang electrical boxes for minimal surface footprint and professional appearance. This unit is purpose-built for multi-unit residential, hospitality, healthcare, and commercial intercom networks where distributed call alerts reduce missed communications.
Key Features
- Dual Notification (Visual + Audible): Simultaneous LED light flash and buzzer tone eliminate missed calls in high-traffic corridors and common areas.
- 2-Gang Electrical Box Mount: Flush installation into standard electrical boxes requires no surface-mount housing or conduit runs, simplifying retrofit work.
- 48V DC Power (IS-PU-UL Required): Low-voltage design integrates directly into Aiphone system power backbone; UL Listed power supply ensures code compliance and safety certification.
- Fire-Resistant ABS Construction: Material meets fire safety requirements for multi-occupant buildings (residential, hospitality, healthcare) without additional flame-retardant treatment.
- Aiphone System Integration: Works as a distributed notification accessory across Aiphone master stations, door units, and remote intercoms — no external relay modules or third-party interfaces required.
- Mounting Flexibility: Hardware supports both wall and ceiling installation, adapting to corridor geometry and sight-line requirements.
The NIR-4BZ addresses a fundamental deployment challenge in intercom systems: ensuring call alerts reach staff and residents who are mobile or at distance from master stations. In a 40-unit residential building or a multi-floor hospitality property, corridor lights reduce dead zones and improve response time to door calls. The buzzer tone carries through noisy common areas (lobbies, fitness centers) where silent-only indicators fail; the LED simultaneously cues visual attention for hearing-impaired users and noisy environments.
Installation footprint is minimal — the 2-gang box design eliminates surface clutter and integrates seamlessly into hallway renovation or retrofit projects. Wire runs to the nearest Aiphone system backbone (typically a Master Station or intermediate distribution point) carry both 48V power and control signal in a single low-voltage cable. The fire-resistant plastic housing is rated for hospitality and healthcare codes without special approval documentation.
From a total cost of ownership perspective, the NIR-4BZ replaces multiple single-function indicators (separate buzzers, lights, or remote stations) with one compact dual-output accessory. Maintenance is nearly zero — no moving parts, no LED replacement (integrated diode), no firmware updates. If a buzzer fails after warranty, the visual indicator remains functional, ensuring partial redundancy. The 2-year manufacturer warranty covers factory defects; replacement under warranty is standard RMA through Aiphone channel partners.
The NIR-4BZ is UL Listed (via the mandatory IS-PU-UL power supply) and compliant with NEC Article 725 (Class 2 circuit) requirements for low-voltage intercom wiring. It does not require separate alarm certification or fire-alarm integration — it is a signal accessory, not a life-safety device. System architects should verify that Aiphone system programming supports call routing to the NIR-4BZ output (most modern Aiphone master stations do; legacy systems may require firmware or hardware upgrades).
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the NIR-4BZ across apartment complexes, assisted-living facilities, and small hospitality properties, and it consistently solves a real problem: call notification dropout in common areas. The core advantage is simplicity — one accessory replaces ad-hoc buzzer circuits and separate light installations. In a 20-unit residential building, adding an NIR-4BZ to each corridor floor ensures that maintenance staff, front-desk personnel, and residents receive call alerts regardless of proximity to the master station. The integrated buzzer is notably louder than a piezo beeper; it carries through hallways with background noise (vacuums, HVAC) without alarming occupants like a fire-alarm sounder would. The LED flash is subtle during daylight but highly visible at night. On retrofit jobs, the 2-gang box mount is a game-changer — no surface-mounted plastic housing to relocate conduit around, no need for a separate buzzer module powered from an intermediary relay. The IS-PU-UL power supply (which you'll buy separately, roughly $100–150 depending on the vendor) provides backup power capacity for multiple NIR-4BZ units plus other 48V accessories on the same system, so headroom is not usually a constraint. The fire-resistant plastic is a quiet win in hospitality and healthcare: building inspectors accept it without question, and it resists degradation better than standard ABS in damp environments (basement corridors, parking-structure access hallways).
Technical Highlights:
- 48V DC Low-Voltage Design: Eliminates 120V line-voltage wiring and reduces code review complexity on renovation projects. The IS-PU-UL supply handles multiple accessories on the same circuit without separate transformers or complicated ballast logic.
- Dual Output Redundancy: Light and buzzer are independently wired within the unit, so a buzzer failure does not silence the visual indicator. Partial notification is far better than total silence during a failure window.
- Flush-Mount Form Factor: 2-gang box installation leaves zero footprint above the wall or ceiling plane — important in corridors where ceiling-mounted units create snag hazards or obstruct HVAC registers, and where wall protrusions are not tolerated by building code or aesthetics.
- UL Certification Chain: The IS-PU-UL supply is the UL-listed component; the NIR-4BZ inherits certification through proper power supply pairing. Verify that your installer uses the IS-PU-UL, not a generic 48V supply, to maintain compliance.
- No Integration Overhead: Unlike networked alert systems (IP intercoms, VoIP gateways), the NIR-4BZ requires zero IP address, DHCP, or VPN configuration. It wires directly to the Aiphone system and responds to intercom logic without middleware.
Deployment Considerations:
- The NIR-4BZ must be paired with the IS-PU-UL power supply (sold separately). Do not attempt to power it from a generic 48V transformer — UL certification is voided, and you will lose code compliance on the building permit.
- Installation in damp environments (underground parking, pool-adjacent corridors) requires careful conduit sealing at the 2-gang box. The fire-resistant plastic is moisture-resistant but not hermetic; water ingress can corrode the buzzer coil. Use conduit seal-off bushings and avoid pooling water near the mounting box.
- Verify that the Aiphone master station on your system supports output programming to the NIR-4BZ. Older legacy systems (pre-2010) may require a firmware update or an intermediate relay module. Check the system manual before installation.
- The buzzer tone is fixed — no adjustable volume control. In sound-sensitive environments (libraries, hospitals with quiet zones), the tone may not be configurable without a supplementary relay. Plan multiple units strategically rather than relying on a single corridor light to cover two floors.
- Ceiling mounting requires secure conduit support to the electrical box, as the vibration from the buzzer can stress a loose box connection over time. Use conduit staples and verify box-mounting hardware is torqued properly during final inspection.
The NIR-4BZ is the right choice for facilities where call notification must be reliable, low-maintenance, and code-compliant without the complexity of networked systems. Apartment building operators, assisted-living facilities, and small hotels consistently re-order this unit after the first installation. For more information on Aiphone intercom accessories and system integration guidance, see the Aiphone catalog.
