What is an RS-232 cable?

What is an RS-232 cable?

Most people simply called it a serial connection. At one time, it was the most used form of data transmission. You will probably recognize the standard 9 pin DB9 cable. Simply put, a RS232 connection transmits signals using a positive voltage for a binary 0 and a negative voltage for a binary 1.

What does RS mean in RS-232?

At one time, RS-232 / EIA-232 was the most widely used communication standard on the planet. It was defined and redefined many times. The “EIA” stands for “Electronic Industries Association” and the “RS” stands for “Recommended Standard.” That being the case, it was always rather loose.

What is the difference between RS-232 and USB?

RS232 is a definition for serial communication on a 1:1 base. RS232 ports can be either accessed directly by an application, or via a device driver in the operating system. USB on the other hand is a bus system which allows more than one peripheral to be connected to a host computer via one USB port.

Is RS232 a protocol?

RS232 is a standard protocol used for serial communication, it is used for connecting computer and its peripheral devices to allow serial data exchange between them. As EIA defines, the RS232 is used for connecting Data Transmission Equipment (DTE) and Data Communication Equipment (DCE).

Is USB faster than RS232?

USB allows data to travel on the average of ten times the speed of the normal parallel port. It is also faster than a serial port. The average serial port transfer rate is 150 kbps; the USB port is up to 12 Mbps. That means that if a new computer comes with USB 2, the older USB devices may still be used.

Why it is called RS-232?

The term RS232 stands for “Recommended Standard 232” and it is a type of serial communication used for transmission of data normally in medium distances. It was introduced back in the 1960s and has found its way into many applications like computer printers, factory automation devices etc.

How many pins are there in Rs-232?

The original pin layout for RS232 was developed for a 25 pins sub D connector. Since the IBM-AT, 9 pins RS232 connectors are commonly used.

How far can I run a RS-232 cable?

The RS-232 standard 9600bps port will drive 15 metres of shielded cable. More precisely, an RS-232 line driver will operate against a capacitance of up to 2500 picoFarad with low enough skew to allow a 9600bps signal to be recovered. If you select a cable with lower capacitance you can drive further distances.

What does RS-232 stand for?

RS232 stands for Recommended Standard 232 (computer serial interface, IEEE ; usually written RS-232) This definition appears frequently and is found in the following Acronym Finder categories: MLA style: “RS232.”.

How far can you run RS232 cable?

The RS232 standards states the maximum cable length as 50 feet, at a baud rate of 19200, or more precisely as the cable length equal to a capacitance of 2500 pF. This means that using a cable with low capacitance allows you to span longer distances without going beyond the limitations of the standard.

How many wires for RS-232 communications?

Most RS-232 devices will operate with only 3 signal wires: Transmit (TX), Receive (RX) and Ground (GND). In order for two RS-232 devices to communicate, you must connect the TX from one instrument to the RX of the second instrument, and vice versa. The Ground pins must be connected together.