RS-232 operates in a full duplex mode, meaning the controller and receiver can communicate at the same time without interference. Mensor transducers with RS-232 require three wires for set up: Transmit Data (TX), Receive Data (RX), and Signal Ground.

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.

A full-duplex device is capable of bi-directional network data transmissions at the same time. Half-duplex devices can only transmit in one direction at one time. With half-duplex mode, data can move in two directions, but not at the same time.

RS232 is more than able to perform for a short distance and low data speed requirements. RS232 has a transmission speed of 1Mb/s up to 15M. However, RS485 has a data transmission speed of up to 10Mb/s for a distance of 15M. At the maximum of 1200M, RS485 transmits at 100Kb/s.

UART is a communications protocol, whilst RS232 defines the physical signal levels. That is, while UART has everything to do with logic and programming, it has nothing to do with the electronics per se. Whilst RS232 refers to the electronics and hardware needed for serial communications.

The CAN network is based on a half-duplex differential signal. There are two logical states: dominant and recessive.

half-duplex – a port can send data only when it is not receiving data. In other words, it cannot send and receive data at the same time. Network hubs run in half-duplex mode in order to prevent collisions. Since hubs are rare in modern LANs, the half-duplex system is not widely used in Ethernet networks anymore.

The RS232 stop bit merely gives a period of time before the next start bit can be transmitted. It is the opposite sense to the start bit and because of this allows the start bit to be seen i.e. a stop bit followed by a start bit always gives a rising edge signal for detection by the receiver.

For RS232 I know its always full-duplex but for RS422 and RS485 both of them are at some places explained a full-duplex while at other places as half-duplex buses. What can we say with certainty about it for these busus?

RS232 is full-duplex, RS485 is half-duplex, and RS422 is full-duplex. 2. 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.

//$//begingroup//$Depends on the application as well. A half-duplex RS422 transceiver that’s great for multi-point topology probably isn’t great if you wanted a full-duplex point-to-point solution. If you’re happy with Maxim chips they have a whole range of them.

Serial communication can be half duplex or full duplex. Full duplex communication means that a device can receive and transmit data at the same time. Half duplex means that the device cannot send and receive at the same time.