What is serial cable used for?
A serial cable is a cable used to transfer information between two devices using a serial communication protocol. The form of connectors depends on the particular serial port used. A cable wired for connecting two DTEs directly is known as a null modem cable.
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. In mixed applications, a 9 to 25 pins converter can be used to connect connectors of different sizes.
Are serial cables still used?
However, serial ports are still frequently used in applications demanding simple, low-speed interfaces, such as industrial automation systems, scientific instruments, point of sale systems and some industrial and consumer products.
What is the serial (RS232) Modem cable used for?
Serial (RS232) modem cable (DB9-DB15). Pinout and signals for building a serial (RS232) modem cable This cable should be used to connect an internal 14.4kbps Speedster modem to a computer.
What size RS232 connector do I need for my application?
Since the introduction of the smaller serial port on the IBM-AT, 9 pins RS232 connectors are commonly used. In mixed applications, a 9 to 25 pins converter can be used to connect connectors of different sizes.
What is DB25 RS232 connector?
The RS232 connector was originally developed to use 25 pins. In this DB25 connector pinout provisions were made for a secondary serial RS232 communication channel. In practice, only one serial communication channel with accompanying handshaking is present.
What are the characteristics of RS-232 interface?
It defines not only electrical signal characteristics, such as signal transmission rate, voltage levels, cable length, timing and short-circuit behavior, but many other things as well, including interface’s mechanical characteristics, connectors, and pinouts. According to RS-232 standard, all the data is transmitted in a time-series of bits.