JBF4374-Ex

Product Features
• Built-in MCU for intelligent signal control.
•  SMT process enhancing product endurance.
•  Explosion-proof type is flameproof enclosure, suitable for petroleum, chemical related and other dangerous places with explosion-proof requirements (Zone I, Zone II).
•  Four-wire system, signal lines are polarity-free, and 24V lines distinguishing polarity.
•  Low power consumption.
•  Communication distance up to 1500m.

Technical Data

Content	Technical parameters
Working voltage	DC24V
loop	DC18V-27V modulation type, connected to control panel
wiring	Four-wires, signal lines polarity-free; and 24V lines distinguishing polarity;
Working temperature	-10~+50℃
Storage temperature	-20~+55℃
Relative humidity	≤95%
Activation current	≤50ma (@24V)
Activation sound pressure	75dB~115dB (@3m)
Modulation cycle	2.0s~4.0s
Flash frequency	1.5Hz~2.0Hz
Dimensions	115mm×155mm×91mm
Addressing method	Using dedicated electric encoder
Addressing range	1-200
Communication distance	1500m
Explosion proof	Ex d ib IIC T6 Gb
Protection grade	IP66
Applied standards	GB 26851-2011 "Audible and/or visual fire alarm signaling appliances" GB 3836.1-2010"Explosive atmospheres - Part 1: Equipment-General requirements" GB 3836.2-2010"Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures 'd'" GB 3836.4 "Electrical apparatus for explosive gas atmospheres Part 4: General requirements"

Structure and Installation
•  Installation shall be carried out in accordance with the relevant provisions of GB 3836.15-2000 "Electrical Equipment for Explosive Gas Environment Part 15: Electrical Installation in Dangerous Places (except coal mine)".
•  Installation needs to meet the relevant acceptance technical specifications of GB50257-1996 "Code for construction and acceptance of electric equipment on fire and explosion hazard electrical equipment installation engineering".
•  Installation needs to connect with explosion-proof components (cable introduction device, explosion-proof flexible hose, explosion-proof junction box, blocking parts, etc.).
•  Use a dedicated electric encoder to write an address (1-200).
•  Terminals L1, L2 respectively connect to signal lines L1, L2, polarity-free; terminal V, G respectively connect to power cord DC24V, GND;
•  The signal lines use ZR-RVS-2 x 1.5mm² twisted pair, and the power cords use NH-BV-2 x 2.5mm².
•  The sounder beacon should be installed after wiring inspection and before commissioning to prevent losses caused by improper installation work.

Wiring

Precautions
•  Static hazard, cleaning must be wiped with a wringing-off wet cloth.
•  Do not replace any components or structures that will affect explosion-proof performance.
•  The wiring is tightened to prevent the wire head from loosening that may cause inactivation.

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