Monitoring dua komputer menggunakan RS 232 to RS 485 converter

Serial communication is commonly used in PC interface, but serial communication that commonly used is RS-232 which only can communicate in one to one. In this final project design a RS-232 to RS-485 converter which in the RS-485 system can communicate in one to many using a multidrop network system. An Application in order to use this converter is monitoring a computer, so that ini one computer we can see what they doing in the order computer by looking in that monitor. Software designed under Windows (32 bit) using Delphi 3.0 from Borland International, Inc Software. There is two kind software which one is a master that use to control which computer we want to see while the other one is slave that use to send the picture in the other computer which stay resident and active. For hardware it made 3 RS 232 to RS 485 converter that installed at the 3 PC which one used for master and 2 PC for slave. Testing in the hardware is by iooking at the signal input from the PC and input-output signal from the IC that used in the converter, testing in the software is the truth of sending data, picture compression, and the speed of transmission. From the data gained shows that the errer is 1% in transmission data and the speed of transmission

Perancangan RS 232 to RS 485 Converter Sistem Network Multidrop

Serial communication is commonly used for PC interfaces. Nevertheless, the commonly used is RS-232, which can communicate one to one only. An achievement was made as a converter from RS 232 to RS 485 has successfully been constructed, whewreas the RS 485 system can communicate one to many using network multidrop system. The converter consists of three main components, i.e., IC Max 232, IC Max 491, and IC LM 555. This paper discusses the converter principal operation, the protocol signal planning , and the testiing of the signal coming in and out of the converter. As the final result, the converter is indeed a solution to the weak point of computer with terminal RS232 that can only setup one to one networking. The networking can now be extended to one to many network system by using RS485 cabl, but not necessarily replacing the terminal RS232 with terminal RS485 Abstract in Bahasa Indonesia : Komunikasi serial banyak sekali digunakan dalam interface PC namun serial yang biasa dipakai adalah RS-232 yang hanya dapat berhubungan secara one to one. Dalam paper ini dirancang suatu Converter dari RS-232 to RS-485 dimana sistem RS-485 dapat berhubungan secara one to many menggunakan sistem multidrop network. Converter menggunakan 3 komponen utama yaitu ICMax 232, IC Max 491 dan IC LM 555. Dalam makalah ini dijelaskan tentang cara kerja, perencanaan sinyal protokol dan pengujian sinyal yang masuk dan keluar dari konverter. Hasil akhir adalah suatu solusi untuk mengatasi keterbatasan komputer dengan terminal RS232 yang hanya mampu membentuk jaringan one to one , menjadi mampu untuk dikembangkan ke sistem jaringan one to many dengan menggunakan kabel RS485 dengan tetap menggunakan terminal RS232 tanpa harus mengganti terminal RS232 menjadi terminal RS485. Kata kunci : desain dan konstruksi, RS 232 to RS 485 Converter, multidrop networ