Difference: the fire junction box is one floor. The wiring of fire-fighting equipment is led to the junction box first, and then connected to the input or output ports corresponding to each sensor and different functional modules after unified wiring. The junction box can be installed in a special shaft.
The module box is specially used to place the fire protection module, which is not within the scope of detection. It is designed for beauty.
The terminal is used to connect wires, that is, a piece of metal sealed in insulating plastic, with holes at both ends for inserting wires and screws for tightening or loosening without welding. ?
The wiring board is used to connect different wires, and different wiring boards are needed according to different voltages and currents. The principle is that the copper sheet is divided into voltage terminal and current terminal, and the crimping area should correspond to the cross section of the wire used. In other words, the fire junction box is specially designed for the wiring and wiring of fire alarm system. The text may be abstract, just find a sample of the junction box of the fire terminal, which is quite intuitive.
Function of fire protection module
input module
The input module is used to receive the normally open or normally closed switch signal input by the fire linkage equipment and feed back the linkage information to the fire alarm controller (linkage type). It is mainly used to connect various active devices on site, such as water flow indicator, pressure switch, position switch, signal valve and external linkage equipment that can send back switch signals.
output module
The output module is used for the automatic fire alarm controller to send command signals to the field equipment.
Input-output module
I/O module is mainly used to control the double-action fire fighting linkage equipment, and can receive the response signal after the linkage equipment moves. For example, it can complete the control of two-stage fire shutter doors, water pumps, smoke exhaust fans and other double-acting equipment.
Relay module
It is mainly used when the bus is in a strong electromagnetic interference area and the bus length exceeds 1000m, so it is necessary to extend the bus communication distance.
isolation module
In the automatic fire alarm system based on bus, it often happens that the local bus fails (such as short circuit), which leads to the failure of the whole alarm system. The function of isolator is to isolate the faulty bus part from the whole system when the bus fails, so as to ensure the normal operation of other parts of the system and facilitate the determination of the faulty bus part. When the bus of the faulty part is repaired, the isolator can resume its work by itself and reintegrate the isolated part into the system.
Baidu Encyclopedia: Fire Protection Module