- Photos & Details
- Specifications
With social progress and scientific development, people's demand for security systems is also increasing day by day, such as common home burglar alarm systems, perimeter security burglar alarm systems, personal protection alarms, and fire emergency alarm management systems. The most commonly chosen home alarm systems and perimeter burglar alarm systems are the first consideration for security management departments in most regions.
Today, let Manager He of Antongruida walk us through the knowledge of perimeter burglar alarm systems, mainly covering communication wiring, preferred networks, and the adaptability and cost analysis of different communication methods for different people and locations.
First, Manager He told us that in security perimeter burglar alarm systems, we can commonly choose from IP network communication, switch communication, RS485 signal communication, CAN bus communication, and wireless 4G application. Currently, the most common are IP network communication and RS485. The RS485 communication protocol: typical serial communication standards are RS232 and RS485, which define voltage, impedance, etc., but do not define software protocols. Different from RS232,
The characteristics of RS485 include:
1. RS-485 electrical characteristics: logic "1" is represented by a voltage difference of +(2-6)V between the two wires; logic "0" is represented by a voltage difference of -(2-6)V between the two wires. The interface signal level is lower than that of RS-232-C, so it is less likely to damage the interface circuit chip, and this level is compatible with TTL level, making it convenient to connect with TTL circuits.
2. The maximum data transmission rate of RS-485 is 10Mbps.
3. The RS-485 interface has strong anti-noise interference capability.
4. The standard maximum transmission distance of the RS-485 interface is 4000 feet, and it can actually reach 3000 meters (the theoretical figure; in actual operation, the limit distance is only about 1200 meters). In addition, the RS-232-C interface allows only one transceiver on the bus, i.e., single-station capability, while the RS-485 interface allows up to 128 transceivers on the bus, i.e., multi-station capability, so users can easily build a device network with a single RS-485 interface.
Because the RS-485 interface has good anti-noise interference, long transmission distance, and multi-station capability, it has become the preferred serial interface. Since the half-duplex network formed by the RS485 interface generally requires only two wires, RS485 interfaces all use shielded twisted pair RVSP for transmission. The RS485 interface connector uses a DB-9 9-pin plug, the RS485 interface for the intelligent terminal uses DB-9 (socket), and the RS485 keyboard interface uses DB-9 (pin).
Second, regarding the TCP/IP network communication protocol, network monitoring is currently the most widely used in local area network networking. When a location that needs to install a perimeter burglar alarm system has TCP/IP protocol signals and a connected network externally or internally, a network wiring communication method can be adopted that reduces labor costs and optimizes wiring distance. Connect the Pulse Electronic Fence host with network communication capability to a network switch port, and connect it to the network control alarm host interface of the monitoring management center. By installing search software on the PC, all network devices installed and used under the network can be searched and displayed, and network IP settings, extension settings, and center machine IP settings similar to those of the monitoring system can be completed. After that, the indoor network alarm host can display the operating and alarm status of all Pulse Electronic Fence hosts, and perform arm/disarm, Zone modification and adjustment, alarm time management, pulse voltage adjustment, and addition or deletion of individual alarm Zones. This greatly reduces the initial construction costs, such as labor and pipelines, and also plays a positive role in later maintenance. One-key arm/disarm, one-key reset, and other operations can be learned by any security personnel.
Finally, let's summarize how to choose the communication method for a Pulse Electronic Fence?
The fundamental deciding factors for choosing a communication method depend on two points: first, the on-site conditions; second, the owner's budget. Why so? Because the purpose of both communication methods is to stably receive alarm information and transmit signals in time. Since the purpose is the same, the deciding factors are construction cost and convenience. When the perimeter wall where we need to install the Pulse Electronic Fence already has network communication capability, such as other network devices in use, network monitoring, or network PTZ cameras, i.e., there is already some network coverage, then choosing the network Electronic Fence communication method will obviously save construction time and labor and piping costs. If there is no network coverage or power supply nearby, we can use RS485 wiring to set up our separate perimeter management alarm system, with independent management and independent signals for easy distinction. Thanks to the stability of RS485 communication, our perimeter protection alarm system is more reliable and responds faster.
- Previous: 4G Wireless Alarm Control Panel
- Next: Third-Generation Full-Function Pulse Electronic Fence Host
Please contact us right away or call the hotline: +86-13590284141. We will answer all your questions in detail. Project Manager Online