Pfannenberg CWB-ATEX 31006905000 5J Xenon Flashing Beacon Red

Pfannenberg CWB-ATEX 31006905000 5-Joule Explosion-Proof Xenon Optical Beacon (Red Lens)

The Pfannenberg CWB-ATEX 31006905000 is an explosion-protected visual signaling beacon engineered for safety-critical alarm signaling in hazardous onshore and offshore environments. Designed to meet strict ATEX/IECEx directives, this 5-Joule Xenon strobe produces high-intensity omnidirectional red flash bursts (1 Hz) capable of piercing heavy maritime fog, dust, and washdown environments.

Manufactured with a corrosion-resistant, marine-grade aluminum/stainless housing and high-impact polycarbonate red dome, the beacon relies on a dual-protection design: flameproof encapsulation (Ex d) for the optical xenon housing and increased safety (Ex e) for the integrated terminal junction chamber. The internal Xenon discharge tube is reinforced with an integrated steel anti-vibration clamp, making it impervious to the structural resonance and continuous vibration typical of marine engine rooms, offshore drilling decks, cargo pump stations, and chemical processing skids.

Model Details

• Manufacturer: Pfannenberg GmbH
• Product Series: CWB-ATEX Visual Signaling Series
• Manufacturer Part Number (MPN): 31006905000
• EAN / GTIN: 4061131158363
• Type Designation: CWB-ATEX 12-48DC / 24-42AC PC RD
• Lens Color: Signal Red

Technical Specifications

Key Features

1. Dual Ex Protection Architecture: Combines flameproof (Ex d) optical encapsulation with an increased safety (Ex e) terminal compartment for wiring without invalidating the flameproof chamber seal.
2. Vibration-Proof Xenon Strobe Assembly: The 5-Joule discharge tube is braced with a mechanical steel clamp, preventing fatigue failure under heavy continuous engine vibration up to extreme sea states.
3. Ultra-Wide Input Voltage Flexibility: Operates reliably across broad voltage windows (10.8–53 V DC and 21.6–46.2 V AC), eliminating the need for dedicated voltage converters on 12V, 24V, or 48V battery and UPS distribution buses.
4. Long Optical Lifespan: Heavy-duty flash capacitors deliver over 8 million continuous flash cycles while maintaining at least 70% of initial light emission intensity.
5. Marine & Offshore Durability: Sealed to IP66 standards and marine-certified (DNV GL / GL standard approval), with an operational temperature profile from -40°C to +50°C.

Compatible Control Systems & Automation Platforms

• Marine Fire & Gas (F&G) Systems: Consilium, Autronica (AutroSafe), Tyco Minerva Marine, Honeywell Notifier, Kongsberg K-Safe.
• Offshore Alarm & ESD Panels: Siemens S7-300/400/1200/1500 (via Ex barrier or safety relay outputs), Allen-Bradley GuardLogix, Emerson DeltaV SIS.
• Marine Machinery Alarm Monitoring (AMS): Wärtsilä, Kongsberg Maritime, ABB Ability Marine Automation.

Applications

• Marine Vessels & Tankers: Visual alarm for CO2 fire extinguishing release, pump room flammable gas alarms, separator room warnings, and inert gas platform indicators.
• Offshore Oil & Gas Rigs: Blowout preventer (BOP) warning stations, drill floor emergency visual alarms, and helideck hazard alert clusters.
• Chemical & Petrochemical Refineries: Flammable solvent containment areas, tank battery overflow warnings, and reactor vessel emergency discharge alerts.
• Hydrogen Generation & Fuel Cell Plants: Early warning beacons mounted in Zone 1 / Zone 2 hydrogen storage clusters.
• Paint Spraying & Powder Coating Facilities: Zone 21/22 combustible dust visual signaling linked to air extraction interlocks.

Frequently Asked Questions

Can the Pfannenberg CWB-ATEX 31006905000 operate directly on shipboard 24V DC emergency batteries?

Yes. The internal wide-band power supply operates without modification between 10.8 V DC and 53 V DC. Even during severe battery voltage drops down to 11V or float charging spikes up to 28.8V, the flash energy remains constant at 5 Joules.

Does servicing the connection chamber invalidate the Ex d flameproof certification?

No. Because the CWB series utilizes an Ex d e combined protection concept, the connection box is designed to increased safety (Ex e) standards, while the Xenon tube and capacitor are permanently sealed in the flameproof (Ex d) enclosure. You can open the terminal cover for field wiring or maintenance without compromising the factory flameproof glass seal.

Can this beacon be installed horizontally or upside-down?

Yes. The internal Xenon strobe tube is secured by a high-grade mechanical steel bracket that prevents tube sagging or electrode disconnection regardless of spatial orientation (vertical, horizontal, or inverted overhead).

How do I maintain the IP66 ingress protection rating in open sea deck environments?

Inspect the synthetic O-ring seal on the terminal compartment cover during commissioning. Ensure the sealing surface is free of grit or salt crust, apply a light film of neutral silicone grease, and torque the cover fixing screws evenly to 2.5–3.0 Nm. Ensure cable gland entry threads are sealed with an Ex-approved elastomeric sealing washer.