The door magnetic system is a kind of safety alarm system, which is divided into door magnet and window magnet (the principle is the same and the shape is different). The door magnet/window magnet is not easy to see if it is not noticed. The so-called door magnet/window magnet is actually the abbreviation of magnetic switch and window magnetic switch. It consists of two parts: the smaller part is a permanent magnet, and there is a permanent magnet inside to generate a constant magnetic field. The larger one is The magnetic body of the door has a normally open reed switch inside. When the permanent magnet and the reed switch are close together (less than 5 mm), the magnetic sensor is in the working state. When the permanent magnet leaves the reed, it must be After the distance, it is in a normally open state. The magnets and reed switches are installed in the door frame (window frame) and the door leaf (window), which are basically embedded installation (also surface mounted), so it is not very difficult for industry professionals to notice this. You can open the door and the external window. Look at the window frame at the top of the door and the outer window of the door. You can see the circular, usually white components. In fact, this is the so-called door magnet and window magnet. .
The fire door magnetic switch is a signal sensor that provides the fire door monitor with a fire door opening and closing state. Let's take a look at the system construction and fire door installation legend:
System construction
1. The connection line between the monitor and the monitoring extension
Each monitor can carry multiple monitoring extensions. The communication line between the monitor and the monitoring extension uses ZR-RVSp-2*1.0mm2 twisted pair cable, and the farthest wiring length of each channel is 1000m.
2. Monitor the connection line between the extension and the monitoring module
• The power cable between the monitoring extension and the monitoring module is ZR-RVS-2×2.5mm2 SC20, CC. With a total of 32 modules (16 of which are normally open fire doors), the farthest wiring length is 500m. Basic principle: The power supply voltage of the most frequently opened fire door is not lower than 18V.
• The communication line between the monitoring extension and the monitoring module adopts ZR-RVS-2×1.0mm2 SC20, CC. In the case of 32 monitoring modules with full, the farthest wiring length is 1000m. The wiring mode is hand-in-hand, not allowed. Node, branch.
• The wiring of the monitoring extension and the integrated electric closed door uses the ZR-RVS -2×2.5 mm2 SC20, CC, and the second bus uses ZR-RVS -2×1.5 mm2. With 200 monitoring modules. The farthest wiring length is 200m, and the wiring method is hand-in-hand. Nodes and branches are not allowed.
• The wiring of the monitoring extension and the integrated door magnetic switch uses ZR-RVS -2×1.5 mm2. With 200 monitoring modules, the farthest wiring length is 200m. The wiring method is hand-in-hand, not allowed. Nodes and branches appear.
3. Monitoring module to linkage door closer, electromagnetic release, magnetic switch, manual closed button connection line (separate type)
• Use NH-RVS-2×1.0 SC15, WC, the length is not more than 5m, the wire is distinguished by different colors, and the number is marked.
4. Pipe protection requirements
• The power and signal cables of the system can be laid together. Please arrange according to the actual project conditions. However, the power and signal lines of this system cannot be co-managed with any other strong electric lines on the engineering site.
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