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Heat Detector
Product Features
•   Embedded intelligent MCU inside for field data collection and analysis.
•   The detection type is A2R with fixed temperature & rate-of-rise alarm report.
•   It can output ADC data (temperature curve) to control panel. The temperature change can be monitored on the control panel.
•   Robust design for HW filter; to prevent electromagnetic interference.
•   Strong resistance to corrosion, critical environmental (heat and humidity).
•   Explosion-proof type is intrinsic-safety.
•   Must connect to safety barrier-grid;up to 10 explosion-proof smoke detectors can be connected to one safety barrier-grid. 

Technical Data
Working voltageDC19V-28V (typical DC24V) provided by control panel; modulation type; Through safety barrier-grid.
Working temperature-10…+55℃
Storage temperature-30…+75℃
Relative humidity≤95%
Monitoring current≤0.3mA(24V)
Alarm current≤1mA(24V)
IndicatorFlashin normal monitoring state; Steady-on (red) in alarm states
DimensionsΦ100mm×41mm(with base)
Protecting area20-30m2
Explosion proof markExibIICT6Gb
Standard(s) compliedGB 4716-2005 “Point type heat fire alarm detector”
GB 3836.1-2010 Explosive Atmospheres Part 1: Equipment-General requirements
GB 3836.4-2010 Explosive Atmospheres Part 4: Intrinsic safety protective equipment “1”

Installation and Wiring
1) Fix the base on the wall (JBF4111-EX explosion-proof heat detector uses JBF-VB4301B detector base)
2) Connect the loop cable wires from terminals 3 & 4 on safety barrier-grid to the base L1 & L2.
3) Connect the panel loop wires to the terminals 1& 2 on safety barrier-grid. It's polarity-free.
4) Burn ID to the detector and then mount it to the base;tighten it clockwise. 

Structure and installation diagram

The intrinsic safety system parameter matching must follow the following principles:Uo ≤ Ui;Io ≤ Ii;Po ≤ Pi;Cc ≤ Co-Ci;Lc ≤ Lo-Li
The detailed meaning of the symbol can be found in GB 3836.4-2010 standard.
Lc: maximum allowed cable (or wire) distribution capacitance and inductor between the safety barrier and the detector.
Uo: maximum output voltage of the safety barrier.
Io: maximum output current of the safety barrier.
Po: maximum output power of the safety barrier.
Lo: maximum external inductor allowed by the safety barrier.
Co: maximum external capacitor allowed by safety barrier.
Ui: maximum input voltage of the detector.
Ii: maximum input current of the detector.
Pi: maximum input power of the detector.
Li: maximum internal inductor of the detector.
Ci: maximum internal capacitance of the detector.
Should use specialized encoder to write address(1-200) to the detector before installation.
Installation shall be carried out in accordance with the relevant provisions of GB 3836.15-2010 “Electrical apparatus for explosive gas atmospheres - Part 15: Electrical installations in hazardous areas (other than mines)” by professionals.
It must be equipped with safety barrier. Safety barrier should be installed outside the explosion-proof area. Attention should be paid to the polarity of the cables.
The number of the explosion-proof smoke detectors behind each safety barrier shall not exceed 10, and the number of safety barrier used in each alarm loop shall not exceed 6.
Note that the terminals of the safety barrier incoming ends must be distinguished between positive and negative polarity, otherwise it will not work properly.
If there are more than one safety barrier in oneloop, they must be connected in parallel at the input end. Serial connection is prohibited.
Static electricity danger. When cleaning, the device must be wiped with damp cloth.