Is it really clear that you use rs-485 optical transceiver?

485 optical transceivers, there are many major functions is to achieve transmission rs485 signal. However, in the course of use, we often encounter various problems. Now we will discuss several major problems and solutions as follows:

1, the use of conventional methods, both ends access 485, front-end equipment and the center equipment on it. However, some of the front-end of the line, PTZ is more often used by many engineers in this case, the star is even connected to the law, that is, the data line of each PTZ is directly pulled to the transmitter location of the Optical Transceiver using this convergence type, If it is a relatively small number of lines, it is not easy to cause problems. However, if more than 10 units of PTZ need connection control, common mode interference will occur at the front end. Therefore, in the line connection mode, convergence type cannot be used. , should use bus type hand in hand connection.

2, rs485 optical transceiver power is very low, less than 10 watts. If the front-end with a large number of pan-tilt, it means that the power is not enough to bring up. In this case, it is usually recommended that the front-end optical transceiver Add an active 485 distributor, the problem is solved naturally. In response to this problem, the company is currently also developing new products in the future RS485 optical transceiver can be increased to 40 watts.

3, some front-end machines will have a problem in the process of connecting to the PTZ. The most distant PTZ cannot be controlled. Usually, the solution to this problem is at the farthest, PTZ, and the data lines. Adding a 120 ohm resistor is also intended to solve the crosstalk problem between the differential resistances between the two wires.

4, Rs485 optical transceiver, in the transmission of industrial data, there is still a bandwidth problem. Above the optical transceiver design principles are applied to monitor the data there, but in the industrial data field RS485 transmission baud rate requirements are relatively high, usually in the protocol involved in more than 1.5 trillion, is also a deep protocol of 485, therefore, for this The problem is that the company has optimized and improved its product design and procedures. At present, most of the industrial data devices can be connected to Lightcomm's data optical transceivers.

In short, data optical transceivers are used in many ways and have many applications. They are also relatively common. Therefore, in the use of the problem, there must be an advance anticipation. A good design will be once and for all.