modem), all signals in one side connected to the corresponding signals in the other side in a one-to-one basis. Reverse or back view of male connector for Female Connector.Ī straight-through cable is used to connect a DTE (e.g. RS-232 Pin outs (DB-9)Ī male DB-9 connector viewed from the front. Note: The result for a DB-25 Connector is reversed (Please refer to DB-9 to DB-25 conversion table below). If the voltage is on Pin 2, then it is a DCE device. Use the simple way below to confirm: Measure Pin 3 and Pin 5 of a DB-9 Connector with a Volt Meter, if you get a voltage of -3V to -15V, then it is a DTE device. A modem is a DCE.ĭTE normally comes with a Male Connector, while DCE comes with a Female Connector. DCE stands for Data Communication Equipment. DTE and DCEĭTE stands for Data Terminal Equipment.
Calculate the 9 bit binary checksum calculator serial#
RS-232C, EIA RS-232, or simply RS-232, refers to the same standard defined by the Electronic Industries Association in 1969 for serial communication.
Step 1: Understand RS232 Connection & Signals If you have a chance to test your RS232 devices with the 232Analyzer software, you should be able to control your RS232 devices in a short period of time. This article will explain the following topics in details:ġ) Step 1: Understand RS232 Connection and Signalsģ) Step 3: Control your RS232 devices by using 232AnalyzerĪfter reading this page, you should be able to understand most of the hardware and software (protocol) standards for RS232.
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