Let's talk about RS485
Let's talk about RS-485 ### What is RS485? RS485 is a standard for serial communication that allows multiple devices to communicate over a single pair of wires. It's used in industrial environments due to its robustness and ability to cover long distances. ### Basic Concepts - **Differential Signaling**: RS485 uses differential signaling, which means it sends data as the difference between two voltages on a pair of wires (A and B). This helps in reducing noise and allows communication over long distances (up to 1.2 km or about 4000 feet). - **Multi-Device Communication**: Up to 32 devices can be connected on a single RS485 bus. - **Half-Duplex**: Communication is typically half-duplex, meaning devices take turns sending and receiving data on the same pair of wires. ### Operation 1. **Data Transmission**: - When a device wants to send data, it generates a differential voltage (e.g., A = +5V and B = 0V for a binary '1', A = 0V and B = +5V for a binary '0'). ...
