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JTG-H-JBF4384-Ex Point-Type Infrared Flame Detector Manual
JTG-H-JBF4384-Ex point-type infrared flame detector (hereinafter referred to as flame detector), using a specially designed four-channel infrared sensor, and then through the built-in high-speed microprocessor and advanced signal processing algorithm, can effectively distinguish the true flame radiation from the interference sources, while increasing the alarm speed, greatly reducing the impact of environmental factors on the flame detector. The flame detector can be set with multiple levels of sensitivity to meet the needs of different occasions. Excellent flameproof and protective design ensures it apply to various harsh industrial environments.
Product Features
Technical Data
ContentTechnical Parameters
Electrical characteristics
Rated voltageDC24V
Working voltage rangeD C18 ~30V
Monitor current17mA ~ 27mA (D C24V )
Alarm current28mA ~ 40mA ( D C24V )
Heating current130mA ~ 220mA (D C24V )
Power-on start time30sec. ( System self-check)
Relay contact capacity2A @ 30VDC
Mechanical properties
AppearanceR AL3001 signal red
Material  Die-casting aluminum
Electrical port3 × M20 × 1.5mm
Protection gradeIP67
DimensionsL 133 mm × W 130 mm × H 182 mm (without mounting bracket)
Weight2.5kg (including mounting bracket)
Environmental characteristics
Ambient temperature-40 ~+ 75 ℃
Relative humidity≤ 95% (no condensation)
Storage temperature-40 ~+85 ℃
Explosion-proof characteristics
Explosion-proof markExd II C T6 Gb / ExtDA21 IP67 T80 ℃
Applied placesApplicable to various flammable and explosive industry (non-residential) sites: Area 1, Area 2, Area 21 and Area 22 that have explosion-proof requirements.
Applied standard
Applied standard15631-2008 GB , GB 3836.1-2010 , GB 3836.2-2010 ,
GB 12476.1-2013 , GB 12476.5-2013
Field of view ≤ 120 °; Sensitivity level: I (under standard test conditions, detection distance ≥ 25m)             
Schematic diagram of detection area
Structure and Installation      
Warning: Before installing the flame detector, be sure to cut off the power supply of the flame detector power supply line.
Note: During the on-site installation, according to the requirements of GB / T 3836.15-2017, the cable entry device and the explosion-proof plug must have obtained the explosion-proof certification that are suitable for the environment, and the cables must be high-temperature resistant.
Note: When the flame detector is installed in the explosion-proof zone, the connection should be of power limitation and controlled. The settings of the flame detector should follow "Code for design of automatic fire alarm system" (GB 50116).
Note: All wires used should be of 1.0 mm2 or more. The end of the wire is stripped off about 6 mm of the insulating sheath, and connected to the terminals of JTG-H-JBF4384-Ex flame detector.
Note: Check whether the external connection line is open or short-circuited.
Product size chart

Ceiling-mounted installation

 Wall-mounted installation 

     Front                            Side

Serial numberNameDescription
1FIRNONormally open relay; the contact is closed when the flame detector reports fire alarm
2FIRCOMCommon terminal of fire alarm relay
3FIRNCNormally closed relay; the contact is open when the flame detector reports fire alarm
4FLTNONormally open relay; the contact is closed when powered on. The contact is open when the detector has fault. If the detector reports fire alarm at this time, the contact remains open.
5FLTCOMCommon terminal of fault relay
6FLTNCNormally closed relay; the contact is open when powered on. The contact is closed when the detector has fault. If the detector reports fire at this time, the contact remains closed
7AUXNOAuxiliary relay, normally open, contact closed when flame detector reports fire. 1
8AUXCOMCommon terminal of auxiliary relay 1
9AUXNCNormally closed auxiliary relay; the contact is disconnected when the flame detector reports fire. 1
1 0NCEmpty pin
1 1+24VDC 24V power input, polarity-free
1 2GNDDC 2 4V power input, polarity-free
1 3L2Fire bus loop L 2 , polarity-free
14L1Fire bus loop L 1 , polarity-free
15NCEmpty pin
16485_ARS 485 bus A, RS485 +, used to configure flame detector
17485_ BRS485 bus B, RS485- , used to configure flame detector
18LP +4-20m A current loop +
19LP-4-20mA current loop-
Note 1 : The auxiliary relay is connected according to the actual needs of customers, and it can provide voltage-free normally open / normally closed contacts with the capacity of 2A@30VDC . External devices or loads should not exceed the contact capacity of the auxiliary relay.
JTG-H-JBF4384-Ex point type infrared flame detector and JB fire alarm control panel JB-QB- JBF5010 connection diagram

Wiring diagram of JTG-H-JBF4384-Ex point type infrared flame detector and PLC industrial computer

Note: Explosion-proof cable, lead-in devices and plugs must be provided, and their explosion-proof level must meet the requirements of Exd Ⅱ C T6 Gb / ExtDA21 IP67 T80 ℃ .
The internal and external grounding must be reliable. 
After passing the inspection of qualified products, it is not allowed to replace components or change the structure at will, so as not to affect the explosion-proof performance. 
During maintenance, pay attention to the explosion-proof surface. All explosion-proof surfaces must not be damaged or corroded. 
It is strictly forbidden to open the cover while electrified. 
Non-professionals are not allowed to install or disassemble the product. 
Flame detectors must be regularly tested and maintained in accordance with national standards and relevant regulations. The detector must be cleaned at least once a year, and tested and maintained once a month.