1Overview

JTG-U-JBF4386-Ex point-type infrared flame detector (hereinafter referred to as flame detector), using a specially designed 3-waveband IR sensor and UV sensor to collect flame radiation signals, through the built-in high-speed microprocessor and advanced signal processing algorithm, effectively distinguishes the true flame radiation from the interference sources. The flame detector has light path self-test function; performance is reliable and alarm speed fast. It can be set with multiple levels of sensitivity and has excellent flameproof protective design, which ensures its appliance to various harsh industrial environments.

1.1 Product features

The product is designed according to the requirements of industry standards, and the performance is stable and reliable.
The core circuit adopts SMT technology, which has high reliability and good consistency.
Three-color indicator can display normal working status, alarm and fault status.
Multi-level sensitivity is adjustable.
Infrared and UV dual-spectral features, through intelligent algorithms, compared to pure infrared flame detector, the alarm speed is faster, the detection distance is longer, and the false positive rate is lower.
Fault mode can accurately locate the fault information.
Automatic defrost function, better resistance to window condensation and frost in low temperature (select when place order).
With light path self-test function, carry out the test every 24 hours to ensure the product normal and reliable.
Various output ports meet different application scenarios.
Enclosure adopts High-strength die-cast aluminum and sapphire glass of high quality. Explosion-proof and the protection grade reaches IP67, with anti-dust, anti-moisture and the corrosion resistance characteristics.
The relevant technical information, drawings and prototypes passed inspection by Supervision & Test Center of Ex-products of China Petroleum & Chemical Industry (PCEC) for electrical products.

l The flame detector has excellent anti-interference ability, and is not affected by wind and rain, high temperature, high humidity, natural artificial light source, lightning, etc., and can work well in various harsh industrial sites indoors or outdoors.

1.2Applied range

Hazardous sites in Area 1, Area 2, Area 21 and Area 22 that containing explosive mixtures of flammable gases in group T1 to T6, grades of A, B, C in category II
The flame detector is mainly suitable for oil depots, alcohol depots, traffic tunnels, aircraft hangars, area with chemical equipment, liquefied gas stations and other flammable and explosive industrial fields, and places where there would be no or little smoldering stage, directly producing open flames.

Notes: This type of product is not suitable for detecting fire in hydrogen or metal combustion occasions.

1.3Model composition

2Working theory

Point type infrared flame detector is a composite four-band light-sensing fire detector. Through three-channel infrared sensor and single-channel ultraviolet sensor, the detector senses the infrared and ultraviolet features of the combustible flame, using excellent alarm algorithm, reports more accurate and faster fire alarm information.

3Technical Data

Environment features

Working temperature	-40～+75℃
Storage temperature	-40～+85℃
Relative humidity	≤95% (no condensation)

Explosive-proof features

Explosion-proof mark

ExdⅡC T6 Gb/ExtDA21 IP67 T80℃

Electrical features

Working voltage	Rated voltage: DC24V Working voltage: DC18～28V
Monitoring current	17mA～27mA (DC24V)
Alarm current	28mA～40mA (DC24V)
Defrost function (Selectable)	130mA～220mA (DC24V) *after the function gest activated
Activation time	30sec. (system check)
Indicator	Green light flashes when monitoring; red light steady on when alarms, yellow light steady on when faults.

Communication features

Output methods	1) Three sets of dry node outputs (fire relays, fault relays and auxiliary relays), relay contact capacity 2A@30VDC. 2) RS485 (Modbus Protocol, see "The Flame Detector RS485 Application Manual”) 3) 4-20mA isolated output.
Address range	NA
Address method	Not addressable
Maximum transferring distance	RS485 communication 1000m

Compatibility

Connect to 11SF series and JBF50XX series control panel by relay module JBF4137A

Mechanical features

Appearance	RAL3003 ruby
Housing material	die-casting aluminum
Protection grade	IP67
Electrical interface	3×M20×1.5mm
Product weight	2.5kg (with installation brackets)
Dimensions	L 133mm × W130mm × H182 mm (without installation brackets)

Detection features

Protection area	Refer to 3.1
Response time	≤5s
Alarm threshold	Low, medium and high 3 adjustable levels (factory default setting is medium) The number of flashing times of the green light of the monitoring status indicates the alarm threshold level. Low: 1 time; medium: 2 times; high: 3 times. (The detection performance is best when the alarm threshold is low, but the false positive rate increases, and when the alarm threshold is high, the reverse)
Alarm delay	0-30s settable (default is 0s)

Certification

Fire protection certificate, explosion-proof certificate

Applied standard

1）	GB 15631-2008 “Special type fire detectors”
2）	GB 3836.1-2010 “Explosive atmospheres - Part 1: Equipment-General requirements”
3）	GB 3836.2-2010 “Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures “d”.
4）	GB 12476.1-2013 “Electrical apparatus for use in the presence of combustible dust - Part 1: General requirements”
5）	GB 12476.5-2013 “Electrical apparatus for use in the presence of combustible dust - Part 5: Protection by enclosures "tD"

3.1 Protection area

Protection range

Field of view ≤ 120 °; Sensitivity level: I

Schematic diagram of detection area

Detection distance

Ignition		Maximum distance
Combustible	Ignition size	Maximum distance
n-heptane	0.1m²(0.3m×0.3m)	60m
Ethanol.	0.1m²(0.3m×0.3m)	40m
Methanol.	0.1m²(0.3m×0.3m)	20m
Gasoline.	0.1m²(0.3m×0.3m)	50m
Diesel.	0.1m²(0.3m×0.3m)	45m
Kerosene.	0.1m²(0.3m×0.3m)	45m
Methane.	0.5m(L)×0.2m(W)	40m
Hydrogen.	0.5m(L)×0.2m(W)	30m
Ammonia.	0.5m(L)×0.2m(W)	30m
Silane.	0.5m(L)×0.2m(W)	25m
Office paper.	0.1m²(0.3m×0.3m)	30m

4 Installation and commissioning

4.1 Installation steps

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.
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).
All wires used should be of 1.0 mm²or 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.
Check whether the external connection line is open or short-circuited.

Product size

Ceiling-mounted installation Wall-mounted installation

Front Side

Figure 1 terminals

No.	Name	Description
1	FIRNO	Fire normally open relay; the contact is closed when the flame detector reports fire alarm
2	FIRCOM	Common terminal of fire alarm relay
3	FIRNC	Fire normally closed relay; the contact is open when the flame detector reports fire alarm
4	FLTNO	Fault normally 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.
5	FLTCOM	Common terminal of fault relay
6	FLTNC	Fault normally 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
7	AUXNO	Auxiliary relay, normally open, contact closed when flame detector reports fire. ¹
8	AUXCOM	Common terminal of auxiliary relay ¹
9	AUXNC	Normally closed auxiliary relay; the contact is disconnected when the flame detector reports fire. ¹
10	NC	Empty pin
11	+24V	DC 24V power input, polarity-free
12	GND	DC 2 4V power input, polarity-free
13	L2	NA
14	L1	NA
15	NC	Empty pin
16	485_A	RS 485 bus A, RS485 +
17	485_B	RS485 bus B, RS485-
18	LP+	4-20m A current loop +
19	LP-	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.
Form 1 terminal description

Figure 2 Flame detector and JB fire alarm control panel JB-QB- JBF5010 connection diagram

igure 3 Flame detector and PLC connection diagram

4.2Commissioning

Commissioning method for connecting fire alarm control panel.

Address JBF4137A relay module using electronic encoder.
Complete the wiring following Figure 2. Register the module on fire alarm control panel.
In front of the flame detector window, move the fire source or the simulated fire source. The flame detector should give fire alarm and the control panel should show fire information.
Reset the fire alarm control panel, and the flame detector should restore normal monitoring status.

Commissioning method for connecting industrial control machine PLC.

Follow figure 3 to complete the wiring, and complete the settings on the PLC.

(Fault: 5mA, ±5%; Normal: 10mA ±5%; Alarm: 15mA ±5%)

In front of the flame detector window, move the fire source or the simulated fire source. The flame detector should give fire alarm and the PLC show fire information.
Through the industrial control machine, cut off the flame detector DC24V power for 2s, and then re-power, the flame detector should restore normal monitoring status.

5 Troubleshooting

Fault Phenomenon	Cause Analysis	Solutions
The patrol light is off, and fault is reported	1. The power cord is not connected	Check and connect the power cable
	2. Poor contact	Rewire
	3. Wiring error	Check and connect the cable correctly according to the wiring diagram of the terminals
No output signal after flame detector alarms	1. The output cable is not connected properly	Check the output cable and connect it correctly according to the wiring diagram
No output signal after flame detector alarms	2. The output cable is wear off or open
Flame detector frequently reports false alarms after powered-on	1. On-site environmental impact	Clear the interference sources in surrounding environment
	2. There is problem with the sensitivity setting	Adjust the sensitivity according to the actual situation on site

6 Maintenance.

The grounding must be reliable.
Do not change any components or structure of the product, so as not to affect the explosion-proof performance.
During maintenance, take care of the explosion-proof surface. The surface must not be damaged or rusted.
Do not open the product when it is powered on. 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 their relevant regulatory requirements. Clean the product at least once a year. Test the product once a month.

7 Out-of-box Check

After opening the package, this product should include:

JTG-Z-JBF4386-Ex flame detector	×1
Manual	×1
Installation bracket	×2
Accessory: Inner hexagonal cylindrical head screw M16×35 ×1 (Used to connect product and installation brackets) Inner hexagonal cylindrical head screw M10×16 ×2 (Used to fix the installation brackets) Inner hexagonal flat head screw M6×8 ×1 (Used to fix the installation brackets) Spring washer 16 ×1 (Used to fix the installation brackets with the product) Flat washer 16 ×1 (Used to fix the installation brackets with the product) 10PIN terminal block ×1 (Used to output / provide power to external devices) 9PIN terminal block ×1 (Used to output / provide power to external devices)	×1

If any item is missing or damaged, please contact us as soon as possible. We will immediately complete the missing item, or unconditionally replace with new product if it is determined caused by non-human factors.

8 Precautions, disclaimers.

Auxiliary relays are connected according to the actual needs of the customer and can provide volt-free open/normally closed contacts with 2A@30VDC contact capacity, and external other equipment or loads should not exceed the auxiliary relay contact capacity.
Explosion-proof cable introductions and plug need to be purchased separately and their explosion-proof rating should meet the Exd II C T6 Gb/ExtDA21 IP67 T80℃ requirements.
Please strictly follow the description of this manual for installation and commissioning.
The Company reserves the right to finally interpret this specification.

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