Multifunction beacon STExB2X21

strobexenon115VAC

Description
The STExB2X21 is an explosion-proof 21 Joule xenon strobe beacon designed for hazardous areas (Zones 1, 2, 21 and 22). The 316L stainless steel corrosion-resistant enclosure, threaded flamepath and large termination area simplify installation while ensuring durability. The high-output xenon flash delivers effective visual signalling even in high ambient light. Field-replaceable UV-stable polycarbonate colour filters and a user-replaceable xenon tube enable easy maintenance. SIL1 & SIL2 Route 2H compliant to IEC61508 (2010) as standard.

Features

• Four flash rates: 1Hz, 1.3Hz, 1.5Hz & double flash
• Automatic synchronisation on multi-beacon systems
• User-replaceable xenon tube, secured against shock & vibration
• Included A4 316 stainless steel guard
• Field-replaceable UV-stable polycarbonate lens colour filters
• 4 cable entries with stopping plugs included
• Corrosion-proof 316L stainless steel enclosure

Upgraded Product

• Lower in-rush electronics
• Enhanced light output
• A4 316 stainless steel guard as standard

Approvals

• IECEx ULD 16.0017X
• ATEX DEMKO 16 ATEX 1466X
• UKCA: UL21UKEX2019X
• TR-CU Ex EAC
• INMETRO IEx 20.0156X
• PESO CCOE certified: P622994
• SIL1 & SIL2 compliant to IEC61508 (2010)

Assemblies
Available as plated assemblies with STEx alarm horn sounders and additional STEx xenon strobe or LED beacons, with or without an STExJ2 Ex d junction box.

Coding

• IECEx / ATEX
• II 2G Ex db IIC Gb T4 Ta -50°C to +65°C (AC: +55°C)
• II 2G Ex db IIC Gb T3 Ta -50°C to +75°C (AC: +65°C)
• II 2D Ex tb IIIC Db T131°C Ta -50°C to +70°C (AC: T137°C)

Effective Candela lens colour factor
Amber: 0.59
Blue: 0.27
Clear: 1.00
Green: 0.51
Magenta: 0.34
Red: 0.15
Yellow: 0.85

Technical specifications

• Source: Xenon strobe – single or dual
• Energy: 21 Joules (21Ws)
• Flash rates: 1Hz; 1.3Hz; 1.5Hz; Double flash
• Effective intensity (IES measured): 1,115.57 cd
• Peak candela (IES measured): 252,852 cd
• Effective intensity (calculated): 1,050 cd
• Peak candela (calculated): 2,100,000 cd
• Lens colours: Amber, Blue, Clear, Green, Magenta, Red, Yellow
• Voltage DC: 24Vdc (20–28Vdc), 48Vdc (42–54Vdc)
• Voltage AC: 115Vac (110–120Vac), 230Vac (220–240Vac)
• In-rush: 1508mA within 5ms @ 24Vdc
• SIL: SIL1 & SIL2 Route 2H IEC61508 (2010)
• Ingress protection: IP66/67 (EN60529)
• Lens material: High impact borosilicate glass
• Enclosure material: 316L stainless steel
• Enclosure finish: Chromate & powder coated; ISO 12944-6 CX, C5VH & C5H
• Cable entries: Side: 4 x M20x1.5mm (stopping plugs included)
• Terminals: 0.5–2.5mm² (20–14 AWG); duplicated
• Ground stud: M5
• Enclosure volume: <2 litres
• Operating temperature: -50°C to +75°C
• Storage temperature: -50°C to +75°C
• Relative humidity: 99% (tropicalised / conformal coated electronics)
• MTBF DC: 155.52 years / 1,362,398 hours (MIL 217)
• MTBF AC: 246.02 years / 2,155,173 hours (MIL 217)
• Weight: 6.0 kg
• Part number base: STExB2 (type X21 = Xenon Beacon – 21 Joule)

Current consumption (extract)
24Vdc (20–28Vdc): nominal 1130mA, max 1240mA, in-rush 1508mA <6ms
48Vdc (42–54Vdc): nominal 530mA, max 560mA, in-rush 2110mA <4ms
115Vac (110–120Vac): nominal 500mA, max 530mA
230Vac (220–240Vac): nominal 195mA, max 270mA

Part numbers (extract)
Product type: STExB2; Type: X21 = Xenon Beacon – 21 Joule; Voltages: DC024 / DC048 / AC115 / AC230; Cable entry options: A–J (4 x M20x1.5mm … NPT / M25 adaptors); Stopping plug / adaptor material: Stainless steel; Guard material: A4 316 stainless steel; Product versions: A (IECEx, ATEX, Ex EAC, INMETRO – SIL1 & SIL2) or U (dual xenon tubes)