The JK-RQ740 combustible gas alarm controller adopts multiple CPUs for parallel processing, programmable logic devices, ARCNET/CAN network, intelligent digital bus and other technologies. It adopts a modular structure, strong anti-interference and anti vibration capabilities, reliable operation, stable performance, low false alarm rate, flexible expansion, and easy maintenance. Adopting a large screen LCD, full Chinese character display, and menu guide, it is convenient for users to operate and use.

AC input voltage:	220V士10/15%，50Hz±1%
Communication input power:	<300W(This only refers to the power consumption of the controller, excluding the power box)
Loop capacity:	≤100 addressing points; Standard configuration includes 2 circuits; Total capacity: ≤ 400 addressing points, 1-100 addresses are only used for combustible gas detectors, module programming, and other addresses are only used for power box programming (addressing points are not included in the total capacity)
DC24V power supply output current:	≤3A
Bus length:	≤1500 meters (cross-sectional area>1.0mm²twisted pair)
LCD specifications:	7-hour, 800 * 480 dot matrix (color screen)
Fire equipment power supply:	JK-742, 9-Ah battery (supports 100 addressing points, 24V power supply)
Power box cable:	24V cable (cross-sectional area>2.5mm²)
External dimensions:	Length 410mm x Width 130mm x Height 600mm

1. Electronic encoding, unique ID, controller online addressing or encoder address setting, powerful debugging function;
2. Seamless switching between primary and backup power sources; Long term overcurrent and short-circuit protection function, capable of self recovery:
3. The panel displays four working status signals: main power operation, backup power operation, main power failure, and backup power failure, and uploads them to the controller;
4. Comprehensive battery charging and discharging management, two-stage charging method of equal charging and floating charging, and backup power over discharge protection:
5. Backup power anti reverse protection function; Backup power single switch function.

Usage environment:	Temperature: 0℃~40℃, humidity: ≤ 90%RH(40℃)
AC input voltage:	AC187V~242V，47Hz~63Hz
DC output voltage and output current:	Output circuit: Output 1 and 2; Output voltage: 26.0 ± 0.5V; Output current: 10A (742)
Output DC voltage ripple noise:	Ripple ≤ 1%, peak ≤ 2%
External dimensions:	Length 450mm x Width 130mm x Height 320mm

1. It can be connected to the JK series combustible gas alarm controller to form a combustible gas detection alarm and automatic monitoring system within a certain area.
2. Real time monitoring of combustible gas concentration within the area, automatic alarm for exceeding limits.
3. Provide a set of active DC outputs that automatically link relevant equipment to protect the environmental safety within a certain area.
4. Electronic coding, unique | D, online addressing, automatic login, fast response speed, stable output interface.
5. Equipped with high-performance CPU and side heating metal oxide semiconductor sensor, with built-in reliable concentration detection and judgment program, strong resistance to environmental interference, and stable operation.
6. Suitable for home kitchens, hotels, residential apartments, and other indoor places where there may be a risk of combustible gas leakage.

Usage environment:	Temperature: -10 ℃~+55 ℃; Humidity: ≤ 95% RH (non condensing)
Working voltage:	Bus pulsation DC24V, power supply DC24V ± 15%
Monitoring current:	Bus 1mA, power cord ≤ 60mA
Alarm current:	Bus 1mA, power cord＜80mA
Bus length:	≤1500m (cross-sectional area 1.0mm ² twisted pair)
Gas detection:	Natural gas (methane)
Alarm setting value:	9%LEL(4500ppm)
Gas alarm status delay:	≤3秒
External dimensions:	Diameter 100mm, height 45mm (including base)