What is RS-232 and RS-485 communication?

Table of Contents

An RS232 Serial Interface is for connecting two devices. There will be one transmitter and one receiver. An RS485 Serial interface can connect up to 32 devices to a single transmitter. Do also take note that RS232 and RS485 are not fixed. Newer equipment uses a USB interface more commonly.

What is the purpose of RS-232?

RS-232 is an interface for the interchange of serial binary data between two devices. It is a standard protocol used for serial communication; it is used for connecting a computer and its peripheral devices to allow serial data exchange between them.

What type of signal is RS-232?

RS232 (single-ended) was introduced in 1962, and despite rumors for its early demise, has remained widely used through the industry. Independent channels are established for two-way (full-duplex) communications. The RS232 signals are represented by voltage levels with respect to a system common (power / logic ground).

What are the 3 differences between RS-232 and RS485?

RS232 is full-duplex, RS485 is half-duplex, and RS422 is full-duplex. RS485 and RS232 are only the physical protocol of communication (ie interface standard), RS485 is the differential transmission mode, RS232 is the single-ended transmission mode, but the communication program does not have much difference.

Is RS485 and RS-232 the same?

While RS-485 and RS-232 have a lot in common regarding the data format, they differ on a very significant parameter: Where RS-232 specifies single-ended connections referenced to ground, RS-485 specifies differential signaling on two lines, called A and B.

Is RS232 digital or analog?

technically, it is all analog (RS-232 uses voltage levels).

What is the limitations of RS-232?

Drawbacks or disadvantages of RS232 It is not suitable for chip to chip or chip to sensor device communications. ➨Supports lower speed for long distances. Higher speed (i.e. 115200 baud) can be achieved for short distances only. ➨RS232 interface requires separate transceiver chips which will add cost to the system.