The RS-232, RS-422 and RS-485 designations refer to interfaces for digital data transmission. RS232 is full-duplex, RS485 is half-duplex, and RS422 is full-duplex. The DTECH Industrial RS232 to RS-422/485 Serial Converter is a bi-directional adapter that lets you adapt an RS232 data signal to either RS485 (2 or 4-wire) or RS422 and vice-versa, with support for baud rates up to 115.2 Kbps. 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 …

Two separate terminal blocks, a rugged terminal block and a terminal block with built-in 120 Ohm termination are included with the product for maximum flexibility. Whereas RS485 is balanced, RS232 is not balanced.

The serial RS232 to RS485 converter and RS232 to RS422 converter units, also called serial converters, are small electronic devices used to convert a serial RS232 signal, (for example the COM port in older computers) into either RS485 or RS422 signals. RS232 to RS422/485 Converter The converter can be configured by the user to convert either RS422 or RS485 to RS232.


The RS-422 and RS-485 interfaces are widely used in the industry for connecting various equipment. The TxD+ and TxD- lines carry transmit data while the RxD+ and RxD- contain the receive data. The CON-485-PE9 has a db-9 female connector on the RS232 serial port, and db-9 male connector on the RS485 port.

Figure 4 is a pin diagram for both 25 pin RS485 pinout half duplex and full duplex pinout connectors.

The receiver also operates differently depending on whether the mode is 2 or 4-wire. rs232 , rs422 , rs485 통신의 차이는 통신 라인과 송수신 드라이버 소자의 차이로 구분됩니다. Capabilities of Modbus RS-232 vs RS-485 Modbus RS-232 Allows Concurrent, Full-Duplex Flow of Data. Dual Protocol RS-485 & RS-232 Transceivers Enable Operation Down to 3.15V. Modbus via RS-232 sends data in the form of a time-series of bits. RS485 pin configuration for DB 25. The RS-232 standard is better known as a normal computer COM port or serial port (although Ethernet, FireWire and USB can also be considered as a serial port). rs232, rs422, rs485 의 차이점 . Figure 4.

Here is a look between the specifications of RS232 and RS485 which tell the story. 1、抗干扰性:rs485 接口是采用平衡驱动器和差分接收器的组合,抗噪声干扰性好。rs232 接口使用一根信号线和一根信号返回线而构成共地的传输形式,这种共地传输容易产生共模 … RS485 drivers are also capable of handling the problem of data collision and bus fault conditions.

Among the serial data interfaces -- SPI, Flex I2C, and many more -- available for electronic equipment, two stand out for their longevity.In spite of the dozens of new kids on the block, RS232 and RS485 … There are many differences between RS232 and RS485 and signaling mode is prominent among them. 1. 그로인해 최대 드라이버/리시버 수나.

최대 사용 거리, 통신 속도 등에 차이가 발생됩니다. Figure 3 is an RS485 wiring diagram for RS485 pinout DB9 connectors. The ISL3333xE and ISL3335xE 3V/5V, two-port, dual protocol transceivers allow designers to replace two chips (one RS‑485 and one RS‑232) with a single device. It is a standard for communication between data terminal and data circuit termination equipment.