RS232 and RS485 serial communication protocols

RS232 and RS485 serial communication protocols

RS232 and RS485 are both serial communication protocols used for data transmission between devices. Here’s a brief overview of each:

RS232:

1. Point-to-point communication: One device can communicate with only one other device.
2. Short distance: Typically used for distances up to 15 meters (50 feet).
3. Low speed: Data transfer rates up to 20 kbps.
4. Single-ended transmission: Uses a single wire for data transmission.
5. Commonly used for: Older computer serial ports, modems, and some industrial equipment.

RS485:

1. Multi-point communication: One device can communicate with multiple devices.
2. Long distance: Can be used for distances up to 1200 meters (4000 feet).
3. Higher speed: Data transfer rates up to 10 Mbps.
4. Differential transmission: Uses two wires for data transmission (balancing and shielding).
5. Commonly used for: Industrial automation, process control, and building automation.

Key differences:

– RS485 supports multi-point communication, while RS232 is point-to-point.
– RS485 has a longer transmission distance and higher data transfer rates.
– RS485 uses differential transmission for better noise immunity.

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Source : LinkedIn

Credits: Mr. Ashish (Ak Yadav) Yadav