The JK-FM770 fire door monitor meets the requirements of GB29364-2012 "Fire Door Monitor" national standard. It is a small wall mounted device suitable for various civilian, commercial, and industrial small fire alarm projects. By connecting the JK series fire door monitoring module, door magnetic switch, linkage door closer, monitoring module, etc., it can control the linkage door closer, receive feedback signals from the door closer and door magnetic switch, and monitor the opening/closing control and status of the fire door. When a fire occurs, the normally open fire door can be closed to prevent the spread of fire and smoke. At the same time, the status of the fire door can be fed back to the JK series fire control room graphic display device, which plays an important role in fire evacuation and escape.
The JK-FM770 fire door monitor adopts programmable logic devices, CAN network, intelligent digital bus and other technologies. It adopts a modular structure, strong anti-interference and anti vibration capabilities, reliable operation, stable performance, and easy maintenance. Adopting dot matrix LCD, full Chinese character display, and menu guide, it is convenient for users to operate and use.

Loop capacity:	≤100 addressing points
DC24V power supply output current:	≤3A
AC input voltage:	220V士10/15%, 50Hz士1%
Communication input power:	≤100W
DC backup power:	DC24V/2Ah fully sealed maintenance free battery
Loop wiring system:	Two bus system
Bus length:	≤2000 meters (cross-sectional area>1.5mm² twisted pair)
LCD specifications:	3.03 hours, 160 * 160 dot matrix
External dimensions:	Length 290mm x Width 100mm x Height 348mm

The JK-FM771 fire door monitor meets the requirements of GB29364-2012 "Fire Door Monitor" national standard. It is a medium-sized wall mounted and suitable for various civil, commercial, industrial, and small fire alarm projects. Its functions and roles are the same as those of the JK-FM770 fire door monitor.

Loop capacity:	≤200 addressing points; Standard configuration includes 2 circuits;
Total capacity:	≤800 addressing points
Number of bus linkage control boards:	≤2 (optional, each linkage board has 42 buttons)
DC24V power supply output current:	≤3A
AC input voltage:	220V士10/15%，50Hz士1%
Communication input power:	≤300W
Loop wiring system:	Two bus system
Bus length:	≤2000 meters (cross-sectional area>1.5mm² twisted pair)
LCD specifications:	7-hour, 800 * 480 color screen
External dimensions:	Length 410mm x Width 130mm x Height 600mm

The JK-FM772 fire door monitor meets the requirements of GB29364-2012 "Fire Door Monitor" national standard, adopts a cabinet design structure, and can be applied to various civil, commercial, industrial large and medium-sized fire alarm projects. Its functions and roles are the same as those of the JK-FM770 fire door monitor.

Loop capacity:	≤200 addressing points;
Total capacity:	≤4000 addressing points
Number of bus linkage control boards:	≤6 (60 buttons per linkage board)
DC24V power supply output current:	≤6A
AC input voltage:	220V士10/15%, 50Hz士1%
Communication input power:	≤300W
Loop wiring system:	Two bus system
Bus length:	≤2000 meters (cross-sectional area>1.5mm² twisted pair)
LCD specifications:	10.1 English hours, 1024 * 600 dot matrix
External dimensions:	570mm in length, 495mm in width, and 1781mm in height

The JK-FM775 fire door monitoring module (hereinafter referred to as the module) is connected to the bus of the JK series fire door monitor, and the relay action is controlled by the built-in microprocessor of the module to activate the external fire door linkage equipment. There is a set of inputs and a set of outputs, where the inputs can detect feedback signals from devices such as door closers and electromagnetic release devices, and can also be connected to door magnetic switches to monitor the opening and closing of fire doors.

Usage environment:	Temperature: -10℃~+50℃; Humidity: ≤ 95%RH(40°C)
24V power supply current:	Monitoring current ≤1mA; Action current ≤30mA (excluding external equipment)
Bus operating current:	Monitoring current ≤0.7mA; Action current ≤2mA; Illuminate the fault light and increase the current by ≤0.5mA
Bus length:	≤2000m (cross-sectional area 1.5 mm² twisted pair)
Line system:	Four wire system, bus polarity free; DC24V has polarity
Shell protection level:	IP30
External dimensions:	Length 90mm x Width 90mm x Height 41mm

Fire doors that are usually kept open should be promptly closed in the event of a fire to block the spread of smoke and isolate the spread of fire. Conventional fire door closers only have a normally closed function and cannot be controlled by fire linkage systems. The linkage door closer usually keeps the door open. In the event of a fire, the fire door monitor receives a fire signal and controls the linkage door closer to automatically shut down or close the door in the event of a power loss. The linkage door closer has a door status signal feedback function and can be manually pressed to shut down the door. When used in conjunction with the fire door monitor, it can achieve sequential closure of double doors and provide feedback on the signal of the door opening in place.

Working voltage:	DC24V, Low power CPU design
Buffer function:	Equipped with two-level speed regulation to ensure smooth closure of fire doors
service life:	≥300000 times
Feedback signal:	Output passive normally open/normally closed signal during action
	Remote control of power-off automatic door closing, feedback of door status signal
	Manually press the power-off button to achieve local power-off and door closing
	Equipped with anti reverse power protection function, reverse power connection will not damage the circuit
	Design with demagnetization and anti peak electromotive force elimination

JK-FM773 (single door) and JK-FM774 (double door) door magnetic switches are used to monitor the opening and closing status of normally closed fire doors, and can provide feedback on their status information to the fire door monitor. They are suitable for indoor use in places where normally closed fire doors are used in civil and commercial buildings.

Environmental temperature for use:	-10℃~ +50°C； Usage environment humidity: ≤95%RH(40°C)
Working voltage:	24V pulsating voltage
Working current:	Static current ≤ 0.3mA
Line system:	Two buses, non-polar
indicator light:	Red, move the magnet away from any reed switch (1 or 2) and the indicator light will remain on (FM774)   Red, move the magnet away from the reed switch, the indicator light stays on (FM773)
External dimensions:	Length 257mm, width 30mm, height 26.8mm (FM774)   81mm in length, 22mm in width, and 18mm in height (FM773)
Shell material and color:	ABS white (FM774); ABS gray (FM773)