SD812F 3BDH000014R1 | ABB | Based on a new type of serial port server

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SD812F 3BDH000014R1 | ABB | Based on a new type of serial port server

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In order to simplify the complexity of power system automation networking, this article has developed a new type of serial port server, SD812F 3BDH000014R1, and proposed a detailed networking solution based on this device. The device adopts a fully digital design, effectively avoiding the complexity and port security issues of traditional PCM networking methods. This scheme not only effectively simplifies the complexity of power automation system networking, but also improves the reliability and quality of automated data transmission.

The power automation system based on the 101 protocol usually uses traditional PCM equipment for networking, SD812F 3BDH000014R1, and uses the 2/4-line EM interface of PCM equipment to provide low-speed asynchronous data channels. The data of RTU devices needs to be modulated by an external modem before entering the 2/4-line EM interface. Correspondingly, a modem is also needed at the data receiving end to demodulate and restore the data. This networking method has three issues:

Firstly, data needs to be modulated and demodulated before transmission. Due to limited audio channel bandwidth, SD812F 3BDH000014R1 can only provide a maximum data transmission rate of 2.4kb/s under existing modulation methods, and due to external interference, the data error rate is relatively high.

Secondly, PCM equipment and automation equipment are managed by different departments and installed in their respective computer rooms. A large number of audio cables need to be laid between the communication room and the automation room. Long lines not only bring unforeseeable interference, but also increase the difficulty of daily line maintenance and fault diagnosis.

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