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Brand: Pfannenberg
Pfannenberg CWB-ATEX Flashing Light 5 J Zone 1 and 21
Description
CWB-ATEX 5 J flashing light for Zone 1, 2, 21 and 22
The CWB-ATEX is a compact explosion-protected xenon flashing light from Pfannenberg that serves as a visual alarm in Zones 1, 2, 21 and 22. It delivers 5 J of flash energy at about 1 Hz from a tall slim housing in stainless steel and aluminium, and carries a DNV approval mark in the product sheet. Seven Star LLC supplies the CWB-ATEX in Oman and the GCC as an independent supplier in Muscat; this page explains the data an RFQ needs.
Construction and protection concept of the CWB-ATEX
The CWB-ATEX combines two protection types. The light housing is flameproof “d”, and the terminal box is enhanced safety “e”, giving the marking II 2G Ex db eb IIC T6 Gb at ambient up to 40 °C and T5 up to 50 °C, plus II 2D Ex db IIIC T85 °C Db and T100 °C Db for dust. The certificate of conformity is EPS 20 ATEX 1 222 X, issued by Bureau Veritas. The housing is stainless steel with an aluminium base in yellow and a black plinth, and the lens is polycarbonate.
Technical specifications of the CWB-ATEX
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Pfannenberg / CWB-ATEX |
| Flash energy / rate | 5 J, approx. 1 Hz |
| Light intensity | 55 cd; signal reception range 172 m |
| Rated voltage | 230 V, 110–127 V, 42–48 V, 24–42 V, 60–80 V (AC/DC groups) and 12–48 V DC; operating range ±10 % |
| Nominal current | 0.08 A (230 V), 0.11 A (110–127 V), 0.3 A (42–48 V); other ranges as listed in the sheet |
| Explosion protection | II 2G Ex db eb IIC T6/T5 Gb; II 2D Ex db IIIC T85/T100 °C Db |
| Certificate | EPS 20 ATEX 1 222 X (Bureau Veritas) |
| Temperature class | T6 for Tamb -40 to +40 °C; T5 for -40 to +50 °C |
| Operating / storage temperature | -40 °C to +55 °C / -40 °C to +80 °C |
| Protection | IP 66 when used for its design purpose; duty cycle 100 % |
| Mounting position | Upright, maximum 45° inclination; not upside down or on a ceiling |
| Materials | Lens polycarbonate; housing stainless steel; base aluminium alloy |
| Connection | Screw terminals 2 x 4 mm² (single wire), 2 x 2.5 mm² (fine wire); 1 x M20 x 1.5 chrome-plated gland (6–13 mm), 1 blanking plug |
| Weight | Approx. 1.24 kg |
How the CWB-ATEX flashes and what limits the installation
A xenon tube flashes behind the polycarbonate lens. The light source keeps 70 % of its emission after 8,000,000 flashes. Because the light must stay upright, the unit can be mounted on walls, posts or pipes with the manufacturer’s brackets, but not hung from a ceiling. Accessories shown by the manufacturer include a protective cage, a mounting plate, a standard fixing bracket and a pipe clamp.
Where the CWB-ATEX fits and related Pfannenberg Ex lights
The CWB-ATEX is the slim 5 J option in the Zone 1 range. The BExBG05, BExBG10 and BExBG15 offer 5, 10 and 15 J in aluminium housings, and the Quadro F12-3G/3D ATEX covers Zone 2 and 22 with 7.5 J. For intrinsically safe loops the IS-mB1 LED light is the manufacturer’s choice. Choose the CWB-ATEX when a tall, small-footprint beacon with an enhanced-safety terminal box is wanted.
Selection and ordering checklist for the CWB-ATEX
- Zone and gas or dust group; confirm IIC and IIIC are acceptable for the site.
- Supply voltage group, since the CWB-ATEX is built for several ranges.
- Lens colour and whether the protective cage, bracket or pipe clamp is needed.
- Mounting orientation: upright only.
- Maximum ambient temperature, to confirm T6 or T5 application.
- Cable and gland: a chrome-plated M20 gland for 6 to 13 mm cable is supplied.
Installation and maintenance of the CWB-ATEX
Mount on the wall, floor or bracket with M6 fixings using the dimensions in the sheet, wire to the screw terminals within the stated cross-sections and close the housing correctly so IP 66 and the Ex protection remain valid. Observe the manual provided in English, German and French. In service, inspect gaskets, the lens and the cage, keep dirt off the lens and test flashing as part of alarm checks.
Typical applications of the CWB-ATEX in Oman and the GCC
The stainless steel housing and DNV listing make the CWB-ATEX suitable for offshore decks, marine terminals, petrochemical units, gas processing plants and tank farms where a small but visible alarm lamp is required. In hot Gulf conditions check the +55 °C operating limit and the T5 limit of +50 °C against solar-heated surfaces.
Planning alarm layouts with the CWB-ATEX
When a CWB-ATEX is placed in an alarm scheme, the first question is visibility. At 55 cd and 5 J the unit is a local-area beacon, so it is normally positioned at eye height near access points, at the end of walkways or beside equipment that requires a warning. Several units can be added where sight lines are blocked by pipe racks or vessels. Keep the unit upright and clear of heat sources, record the temperature class of each location, and label the circuit so maintenance staff know the supply group that was ordered. A spare complete unit is often stocked because the voltage group cannot be changed on site, and a protective cage should be chosen where vehicles or scaffolding movements are expected nearby.
Documentation matters for hazardous-area audits. Keep the certificate reference, the product sheet and the installation manual with the loop file, and note the gland and stopping plug used. These records make periodic inspection under the site Ex management system straightforward.
Information to send with an RFQ for the CWB-ATEX
- CWB-ATEX with supply voltage and lens colour
- Zone, gas group and temperature class
- Accessories: cage, bracket or pipe clamp
- Quantity, delivery site and certificate requirements
Documents and quotation
The Pfannenberg product sheet for the CWB-ATEX is attached on this page, with the data, dimensions and ordering information.
Send the voltage, lens colour, accessories and quantity and Seven Star LLC will confirm availability and a quotation.
Datasheets & Documents
- Datasheet CWB-ATEX Product Sheet Download
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About brand
Pfannenberg is the German maker of thermal management and signalling products for electrical enclosures and industry: filter fans, cooling units, air-to-water heat exchangers, chillers, heaters, sirens and beacons. Otto Pfannenberg, an electrical engineer, founded the company in Hamburg in 1954, and in 1958 he invented the filter fan to stop components in control cabinets from overheating. Pfannenberg is still family-owned and headquartered in Hamburg.
Seven Star LLC is an independent supplier in Muscat. We list Pfannenberg signalling devices and enclosure climate products for panel builders and plant engineers in Oman and the GCC.
Pfannenberg company profile
| Founded | 1954, Hamburg, Germany |
|---|---|
| Founder | Otto Pfannenberg, electrical engineer |
| Headquarters | Hamburg, Germany; North American headquarters in Lancaster, New York |
| Ownership | Family-owned |
| Product families | PF Filterfans, DTS and DTI cooling units, air-to-water heat exchangers, process chillers, enclosure heaters and thermostats, PA and DS sirens, beacons and combined signalling devices |
Milestones
- 1954: Otto Pfannenberg founds the company in Hamburg.
- 1958: Pfannenberg invents the filter fan for control cabinets.
- 1962: The company introduces an industrial flashing light that does not need a bulb change after activation.
Pfannenberg product series
Signalling devices include the PATROL PA X combined flashing sounders from 105 to 122 dB(A), the PYRA flashing light sounder, the PRO 10-Ex sounder for zone 2 and zone 22, and the INTENSE BR 50 modular LED signal tower.
Thermal management covers FLZ enclosure thermostats, twin thermostats, hygrostats and Peltier thermostats, FLH radiant heaters and PFH and FLH-T fan heaters, PF filter fans in several installation sizes up to 785 m3/h and the PTF roof-mounted filter fan, and DTS and DTI cooling units, including the DTI outdoor version.
Where Pfannenberg products are used
Control and drive cabinets on machines and in plant rooms, outdoor enclosures in hot and humid climates, and alarm and evacuation signalling in industrial buildings and process areas. In the Gulf, cabinet cooling and condensation control are the main reasons for specifying Pfannenberg thermal products.
Pfannenberg products we list
Ordering Pfannenberg products: what we need
Send the article number or full designation, such as PA X 1-05 or DTI 8401P. For signalling devices add the supply voltage, lens and housing colour and any required approval such as EN 54-3 or an Ex certificate. For cooling units give the cooling capacity, voltage and frequency, mounting (side or roof, internal or external) and the ambient temperature. For fans and heaters give the installation size, voltage and airflow or heating power.
Facts checked against Pfannenberg's published company history, October 2026.
Browse Pfannenberg products by category: Enclosure Climate Control, Fire & Gas Detectors, Cooling.
FAQ
Questions about the Pfannenberg CWB-ATEX Flashing Light 5 J Zone 1 and
Answers from our engineering team on installation, compatibility and integration.
01What is the CWB-ATEX protection marking?
The sheet lists II 2G Ex db eb IIC T6 Gb at Ta up to 40 °C and T5 at up to 50 °C, and II 2D Ex db IIIC T85 °C Db or T100 °C Db.
02How bright is it?
Flash energy is 5 J at approximately 1 Hz, with 55 cd and a stated reception range of 172 m.
03Can it be mounted on a ceiling?
No. It must be mounted upright, with a maximum 45 degree inclination, and not upside down or on a ceiling.
04What is its operating temperature?
Operating range is -40 °C to +55 °C. The T6 class applies up to +40 °C and T5 up to +50 °C ambient.
05Which accessories exist?
The manufacturer shows a protective cage, a mounting plate, a standard fixing bracket and a pipe clamp as accessories.
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