Product Overview_Ningde Androld Automation Equipment Co.,Ltd.

May 11, 2026

Product Overview

AB121（3.jpg 1.Product Overview The AB121 is a heavy-duty industrial combined sounder and beacon manufactured by E2S, UK. Adopting high-efficiency Class D amplifier technology with low power consumption, this integrated alarm device delivers high-decibel audible warning and high-brightness visual indication, supporting multi-stage graded alarm output. Featuring an IP66/IP65 high ingress protection rating, wide temperature tolerance, corrosion resistance and anti-vibration structure, the AB121 is specially designed for harsh industrial environments. It is widely applied in fire alarm, gas leakage detection, equipment fault warning and emergency alert scenarios in chemical plants, marine vessels, offshore platforms, heavy industry workshops and outdoor industrial sites. The AB121 series includes two mainstream models for different warning levels: AB121RTH (Halogen Rotating Beacon for normal status warning) and AB121STR (Xenon Strobe Beacon for emergency critical warning).

Description

AB121（3.jpg

1.Product Overview

The AB121 is a heavy-duty industrial combined sounder and beacon manufactured by E2S, UK. Adopting high-efficiency Class D amplifier technology with low power consumption, this integrated alarm device delivers high-decibel audible warning and high-brightness visual indication, supporting multi-stage graded alarm output.

Featuring an IP66/IP65 high ingress protection rating, wide temperature tolerance, corrosion resistance and anti-vibration structure, the AB121 is specially designed for harsh industrial environments. It is widely applied in fire alarm, gas leakage detection, equipment fault warning and emergency alert scenarios in chemical plants, marine vessels, offshore platforms, heavy industry workshops and outdoor industrial sites.

The AB121 series includes two mainstream models for different warning levels: AB121RTH (Halogen Rotating Beacon for normal status warning) and AB121STR (Xenon Strobe Beacon for emergency critical warning).

2. Model Differentiation

Model No.	Light Source Type	Core Features	Application Scenarios
AB121RTH	40W Halogen Rotating Lamp	Stable rotating operation, high reliability, long service life, soft and continuous visual warning effect	Marine vessels, offshore platforms, factory routine monitoring, outdoor equipment normal status warning
AB121STR	Xenon Strobe Lamp	Instant high-brightness flashing, strong visual impact, excellent long-distance visibility	Fire emergency, gas leakage alarm, high-risk area alert, critical equipment fault warning

AB121（4.jpg

3. Technical Specifications

3.1 Audible Performance

Maximum Sound Pressure Level: 124dB(A) @ 1m (±3dB)
Standard Sound Pressure Level: 121dB(A) @ 1m, 112dB(A) @ 3m
Tone Library: 64 built-in industrial standard tones, fully compliant with UKOOA, PFEER, DIN, IMO and other international industrial safety standards
Control Function: 4 independent graded alarm channels, stepless volume adjustment, mute start/stop available
Effective Sound Transmission Distance: Up to 323m in high-power mode, 221m in standard mode

3.2 Visual Performance (AB121RTH)

Light Source Specification: 40W halogen bulb (G6.35/GY6.35 universal interface)
Rotation Speed: 180RPM (±30RPM), stable and jitter-free operation
Luminous Intensity: Peak 1204cd, effective intensity 325cd
Service Life: Driver lifespan ≥ 5000 hours
Lens Color Options: Red, Yellow, Green, Blue, Amber, Clear; field replaceable

3.3 Electrical Parameters

The AB121 supports full-range industrial AC/DC power supply, compatible with most industrial control systems. Detailed electrical parameters are shown below:

Power Version	Operating Voltage Range	Lamp Operating Current	Default Tone Current	High Power Tone Current
DC012 (12V DC)	10-15Vdc	3000mA	376mA	440mA
DC024 (24V DC)	18-30Vdc	1540mA	430mA	930mA
AC115 (115V AC)	103.5-126.5Vac, 50/60Hz	338mA	173mA	340mA
AC230 (230V AC)	207-253Vac, 50/60Hz	186mA	105mA	212mA

Built-in reverse polarity protection circuit. Maximum surge current: 815mA @ 24Vdc (4ms duration). Compatible with industrial loop monitoring circuits to avoid equipment damage caused by wiring errors.

3.4 Environmental & Structural Specifications

Ingress Protection: IP65, dust-tight and waterproof, suitable for all-weather outdoor operation
Housing Material: High-impact flame-retardant ABS/PC composite material (UL94 V0&5VA), anti-aging, anti-corrosion and flame resistant
Lens Material: UV-stabilized polycarbonate (PC), field replaceable
Operating Temperature: -40℃ ~ +66℃
Storage Temperature: -40℃ ~ +70℃
Operating Humidity: 95% RH maximum (non-condensing) at 20℃
Terminal Specification: Suitable for 0.5-2.5mm² (20-14AWG) cables, pluggable terminals for easy wiring
Cable Entry: Dual-side & rear M20 sealed cable glands, compatible with 1/2"NPT adapters
Weight: 2.30kg (DC version), 2.90kg (AC version)

4. Core Functions & Features

4.1 Synchronized Audible & Visual Alarm

The AB121 supports independent sound-only, light-only or synchronized sound-light alarm modes. It can be powered by single power supply or dual independent power supplies. Multiple devices can be networked for synchronous alarm operation, ensuring unified warning effect in large-area industrial sites.

4.2 Programmable Multi-Stage Alarm

Equipped with 4 independent alarm channels for remote graded triggering. It supports configurable normal warning, primary fault, secondary emergency and critical danger alarm levels. Users can customize tone type, volume and light frequency to meet personalized alarm logic requirements for different industries.

4.3 High Industrial Reliability

Adopts flame-retardant and impact-resistant housing with stainless steel fasteners, featuring excellent vibration resistance, aging resistance and extreme temperature adaptability. The built-in circuit monitoring system supports loop fault detection, realizing real-time fault diagnosis and avoiding invalid alarm failure in unattended industrial scenarios.

4.4 Flexible Installation

Dual installation methods (external mounting lugs & internal fixing holes) are available. The device can be installed vertically, horizontally or obliquely on walls, cabinets, brackets and columns, adapting to narrow spaces and high-altitude working conditions.

5. Control Configuration Modes (DC Version)

Config 1/5 (Default): Common negative, positive trigger, 4-stage alarm, only stage 1 loop end monitoring
Config 2/6: Common positive, negative trigger, suitable for reverse control loops
Config 3/7: Dual-loop monitoring, stage 1 & stage 2 loop end monitoring with reverse polarity detection
Config 4/8 (Custom): Independent triggering and monitoring for stage 1 & stage 2, forward polarity detection for high-precision security systems

6. Certification & Compliance

The AB121 series has obtained multiple international authoritative certifications: CE, UKCA, EAC and marine registration certification. It fully complies with PFEER, UKOOA, IMO and other international industrial safety specifications, eligible for marine, offshore, chemical and industrial standard projects worldwide.

7. Typical Applications

Industrial Plants: Equipment fault warning, pipeline abnormal alert, fire linkage alarm
Chemical & Energy Industry: Gas leakage alarm, high-risk zone safety warning
Marine & Offshore: Navigation warning, platform equipment fault alert, cabin emergency alarm
Municipal Infrastructure: Pump station, power station and rail transit emergency indication
Heavy Machinery: Large equipment start-stop reminder and fault alarm

8. Installation & Maintenance Instructions

8.1 Installation Guidelines

Install the device away from strong shielding, corrosive substances and heavy dust accumulation areas. Apply full waterproof sealing for outdoor cable wiring. Strictly distinguish positive and negative poles to prevent reverse connection. Unify parameter configuration for networked devices to ensure synchronous alarm performance.

8.2 Daily Maintenance

Regularly clean dust and stains on the lens and housing to guarantee light transmission and sound output effect. Check terminal tightness and cable aging condition every six months. Halogen bulbs and xenon flash tubes are wearable parts, which can be replaced separately without overall equipment replacement, greatly reducing operation and maintenance costs.

9. Product Advantages

Powerful Warning Performance: Ultra-high sound pressure plus high-brightness light source, supporting long-distance warning; 64 standard industrial tones cover all industry application demands.
Wide Compatibility: Full-range voltage adaptation, multiple control modes and color options, supporting personalized parameter customization.
Extreme Environment Durability: IP65 high protection grade, flame-retardant anti-aging housing and wide temperature working range for harsh working conditions.
Low Operation Cost: Plug-and-play wiring, modular structure and separable wearable parts simplify installation and maintenance.
Global Compliance: Multiple international certifications to meet industrial, marine and fire safety standards worldwide.

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