After the EAS equipment arrives at the installation site, first observe the environment of the antenna installation location, initially check everything within the installation location 10 meter (mainly check the obvious interference sources), and then connect the system equipment to power-on test according to the actual situation. After the system is connected, check the wiring repeatedly to avoid loose wiring and reverse connection of positive and negative poles. Power on only after confirmation.

In addition, there is a prerequisite: the power supply line of the system must be powered separately, and no other power supply equipment is allowed on the same line. And the power supply voltage must be a stable voltage. Otherwise, the system will not work normally.

System wiring: double-core shielded wire

1. Installation environment: The application of cargo electronic anti-theft system has been proved by a large number of installation practices: the surrounding environment has an extremely important impact on the anti-theft system, so you should be familiar with the surrounding environment when installing. Please note the following:

1, anti-theft antenna installed on the door frame should pay attention to the anti-theft antenna on both sides must be at least 25CM away from the door frame, especially when installing a metal door frame.

2. The installation distance of anti-theft antenna should be determined according to the manufacturer's regulations and the actual situation on site. The distance is determined on the basis of testing before installation (very important). As long as there is no problem during the test, the distance can be determined, and the test should be determined according to the type of label used.

3, the basis of the test is

The three green LEDs DS 1, DS2 and DS3 on the upper left of the receiving board reflect the interference of the site environment. The best state is that when all three LEDs are off, the tag can be quickly detected and alerted. Generally speaking, the first green light DS 1 allows slight flashing. When DS2 and DS3 are off, the tag can be detected and alerted. When the green stoves of DS 1, DS2 and even DS3 are on, it means that the site environment is very bad and the machine can no longer be used.

4. About debugging

Actually, the anti-theft antenna has been basically debugged when it leaves the factory. Just follow the label strictly and determine the installation distance. Generally, no debugging is needed in normal environment, but most sites will have slight interference. Just adjust the VR4 potentiometer to increase the sensitivity clockwise and decrease the sensitivity counterclockwise.

5. About test standards

When the anti-theft antenna detects the tag, it is directional. Generally, as long as the label to be detected is attached to the stomach, it can give an alarm in time when it passes through the anti-theft antenna, and detection in other directions is not needed. There is another direction that needs special explanation, that is, the anti-theft antenna may not detect the tag when it is in the horizontal direction, which is determined by the physical characteristics of the anti-theft antenna. Any brand of anti-theft antenna is the same. Of course, people who steal things generally don't know, and it is difficult to keep the mark level. Therefore, in practical application, the horizontal direction of the label can generally be ignored.

6. About power supply

The anti-theft antenna mentions the use of an independent power supply, so what is an independent power supply? Independent power supply means that the 220 volt socket of the anti-theft antenna is the power supply from the main switch, and the line from the main switch to the anti-theft device socket cannot be connected to other loads. Because the power supply is taken from other electrical equipment, it may cause some interference to the power supply of the burglar alarm and make the burglar alarm give a false alarm.

7. Main transmitter and auxiliary transmitter

When there are two transmitting antennas, it is necessary to separate the main transmission from the auxiliary transmission, and the transmitter is in the main transmission state when it leaves the factory. When the main transmitter is set as the auxiliary transmitter, it is only necessary to set the pins (or toggle switches) of JP2 and JP3 on the main transmitter board in opposite directions. If there are two transmitters, you can choose either one as the main transmitter. If there are three transmitters, you'd better choose the middle one as the main transmitter and the transmitters on both sides as the auxiliary transmitters. No matter how many transmitters are connected together, there can only be 1 main transmitter, and all others are auxiliary transmitters. Multiple secondary transmissions are called primary secondary transmissions, secondary secondary transmissions, and so on, and can be divided into ten secondary transmissions at most, that is, 20 secondary transmissions, which can be divided infinitely in theory, but practice has proved that when the secondary transmissions exceed 20 times, the signal will be greatly attenuated, so a "signal synchronizer" is needed.

8. About the synchronization line

Synchronization line refers to a kind of double-core shielded wire between transmitter and transmitter, which is used to generate synchronization signals. As long as four antennas (two transmitting and two receiving) are installed, the synchronization line must be connected, otherwise the burglar alarm will not work. When there are two or more transmitting antennas in the burglar alarm, it is necessary to connect the synchronization line.

9. Connection and setting of synchronization line

The first step is to determine the main transmission (without any settings), and then set the jumper (or toggle switch) for the auxiliary transmission. The second step is to connect the wires. The synchronization line is connected from P3 terminal (synchronization output) on the main transmitter, and the other end of the synchronization line is connected to P2 terminal (synchronization input) on the sub-transmitter board, which is considered as a good connection. If there is a secondary sub-transmitter below, connect it from P3 and P4 terminals of the primary sub-transmitter, and connect it to P2 of the secondary sub-transmitter, and so on.