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Are RS232 and RS485 interchangeable?
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.
Can RS232 read RS485?
No. 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. It may also be necessary to convert RS232 to RS485 or vice-versa.
How far away can devices be away from each other in RS-232 and RS485 connections?
The main differences between RS-232, RS-422 and RS-485
| Port name | RS-232 | RS-485 |
|---|---|---|
| Maximum distance | 15 meters at 9600 bps | 1200 meters at 9600 bps |
| Contacts in use | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND* | DataA, DataB, GND |
| Topology | Point-to-Point | Multi-point |
| Max. Number of connected devices | 1 | 32 (with repeaters larger, usually up to 256) |
Is RS232 single ended or differential?
Electronic data communications between elements will generally fall into two broad categories: single-ended and differential. RS232 (single-ended) was introduced in 1962, and despite rumors for its early demise, has remained widely used through the industry.
What’s the difference between RS485 and RS232?
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.
What kind of pinout does a RS485 connector have?
RS485 is primarily used in multi-drop configurations that make use of its balanced differential interface. Figures 3 and 4 show an RS485 pinout diagrams for 9 pin DB9 and 25 pin DB25 connectors As displayed in the RS485 cable pinout, the interface has all signals in differential configurations.
What is the original number of the RS-232 interface?
The RS-232 interface complies with the interface standard for serial data communication established by the Electronic Industries Alliance (EIA). The original number is EIA-RS-232 (232, RS232 for short). It is widely used for computer serial interface peripheral connections.
Which is Multiprotocol transceiver combines RS485 and RS232?
The LTC2870 and LTC2871 are offered in small QFN and TSSOP packages. The LTC2870 and LTC2871 differ in how their transceiver I/Os are pinned out, as well how they are controlled. The LTC2870 offers two RS232 transceivers that share I/O pins with an RS485 transceiver. It can operate in either RS232 mode or RS485 mode but not both at once.