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09

2022

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09

What is a protocol converter?


What are the characteristics of protocol converters? With the rapid development of computer network technology, we have established various network systems, which has caused the problem of how various networks are connected to each other. One way is to introduce international standards. The network architecture of protocol converters and the international standards of communication protocols are becoming more and more mature.

The protocol converter is referred to as the protocol converter, also known as the interface converter, which enables the hosts on the communication network that use different high-level protocols to still cooperate with each other to complete various distributed applications. It works at the transport layer or higher. The interface protocol converter can generally be completed with an ASIC chip, with low cost and small size. It can perform mutual conversion between the Ethernet or V.35 data interface of the IEEE802.3 protocol and the 2M interface of the standard G.703 protocol. It can also be converted between 232/485/422 serial port and E1, CAN interface and 2M interface.

Protocol conversion is a kind of mapping, that is, the sequence of sending and receiving information (or events) of one protocol is mapped to the sequence of sending and receiving information of another protocol. The information that needs to be mapped is important information, so the protocol conversion can be regarded as the mapping between the important information of the two protocols. The so-called important information and non-important information are relative, and should be determined according to specific needs, and different important information will be selected for mapping, and different converters will be obtained.

What is a protocol converter? The emergence of various types of converters has greatly expanded the scope of use of various instruments (devices), providing more flexibility and wider adaptability for automatic control systems. The basic role of various converters is to convert information into a format that is easy to transmit and process. There will be no distortion, delay, etc. during the conversion process, so there are certain requirements for the linearity, I/O impedance matching and isolation of the converter. Linear characteristics. A good ratio relationship is required between the output signal Y of the converter and the input signal X (eg, Y=KX A, where K in the expression, A is a constant). input impedance and output impedance. In order to obtain high conversion accuracy, the input impedance and output impedance of the converter should be matched with the input and output meters. isolation properties. The input circuit, the output circuit and the power supply circuit should be isolated from each other in the DC position, and the ground points of the input and output circuit F should be separated to improve the anti-interference ability.

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