Description

Elevator Car Overload Buzzer OMA4351ARF – Product Introduction
Company Name: Nanjing Zhuye Elevator Parts Co., Ltd.

Nanjing Zhuye Elevator Parts Co., Ltd., headquartered in Nanjing, Jiangsu Province, has been a professional supplier of elevator and escalator spare parts since 2012. We are now pleased to introduce the Elevator Car Overload Buzzer OMA4351ARF, a compact yet powerful acoustic safety device engineered for modern traction and hydraulic elevators. This buzzer provides an immediate audible warning whenever the rated load is exceeded, ensuring passenger safety and protecting critical mechanical components.

Key Features

1. Instant Audible Alert
• Dual-frequency piezo element (2.9 kHz + 3.6 kHz) cuts through ambient noise, reaching 85 dB at 1 m—louder than typical cabin conversations yet within EN 81-20 limits.
• Sound pattern is programmable (continuous, intermittent, or sweep tone) via DIP switch, allowing easy adaptation to local codes or customer preferences.

2. Robust & Reliable Construction
• Flame-retardant ABS housing rated UL-94 V-0 and IP54 sealing protect against dust and water ingress.
• Operating temperature –20 °C to +70 °C; humidity tolerance 5 %–95 % RH non-condensing.
• MTBF > 50,000 hours validated by HALT and IEC 60068-2-27 shock tests (30 g).

3. Universal Electrical Interface
• Wide supply range DC 12–48 V (±10 %) with reverse-polarity protection.
• NPN/PNP open-collector input accepts dry contacts or 24 V logic directly from load cells or weight amplifiers—no additional relay required.
• Power draw < 40 mA, minimizing drain on standby batteries.

4. Compliance & Certification
• Fully compliant with EN 81-20/50, EN 81-70 (accessibility), and GB 7588 safety standards.
• CE, RoHS, and REACH certified.
• On-board self-test circuit reports buzzer integrity to the controller every 24 hours.

5. Simple Installation & Maintenance
• Snap-fit DIN rail or 2-screw surface mounting; footprint only 50 mm × 38 mm × 28 mm.
• Quick-connect spring terminals accept 0.5–1.5 mm² wires—tool-free wiring in under two minutes.
• Front-facing LED indicator confirms power and trigger status, streamlining diagnostics.

Applications

• Passenger elevators (high-rise offices, hotels, residential towers).
• Freight elevators with overload protection requirements.
• Hospital lifts to prevent unsafe loading of stretchers and equipment.
• Modernization projects replacing legacy mechanical bells.

Technical Specifications

| Parameter | Value |
| Model | OMA4351ARF |
| Supply Voltage | DC 12–48 V (±10 %) |
| Current Consumption | ≤ 40 mA (24 V DC) |
| Sound Level | 85 dB @ 1 m |
| Frequency | 2.9 kHz / 3.6 kHz dual-tone |
| Housing Material | UL-94 V-0 ABS + PC |
| Protection Rating | IP54 |
| Operating Temp. | –20 °C to +70 °C |
| Certifications | CE, RoHS, REACH |
| Warranty | 24 months (extendable) |

Installation & Maintenance Guide

1. Mount buzzer inside the car top or COP using the supplied bracket; ensure grill faces downward.
2. Connect power (12–48 V DC) and trigger wires to the load-cell amplifier or controller relay.
3. Select desired tone pattern via DIP switch.
4. Perform overload test: buzzer must sound within 1 s of exceeding rated load.
5. Periodic inspection: wipe grill and verify LED status—no calibration required.

Why Choose Nanjing Zhuye Elevator Parts?

• 20+ Years of OEM & Aftermarket Expertise: trusted by OTIS, KONE, Thyssenkrupp, Mitsubishi, and local brands.
• Global Logistics: same-day dispatch for stock items; 3–5 day delivery worldwide.
• Customization: OEM labeling, custom cable lengths, and alternative mounting brackets available.
• 24/7 Technical Support: multilingual engineers provide remote diagnostics and on-site training.
• Sustainability: lead-free soldering, recyclable packaging, and carbon-neutral shipping options.

Customer Testimonials

“The OMA4351ARF buzzer solved our noise compliance issues in busy shopping-mall elevators. Shipping from Nanjing Zhuye was faster than local suppliers!” — Global Elevator Services

“Installation took less than five minutes, and the dual-tone alert is clearly audible even during rush hour. Highly recommended for retrofits.” — Metro Maintenance Co.