RS-485 Voltage and Characteristics

RS-485 is a widely used serial communication standard in industrial and commercial applications. Ideal for data transmission, RS-485 possesses specific electrical characteristics. This article will provide detailed information about RS-485 voltage and its general features.

RS-485 Voltage RS-485 is a differential communication standard, meaning data is transmitted in opposite directions between two wires. This provides more resistance to noise and electromagnetic interference. RS-485 voltage levels represent the difference between positive and negative voltages that convey data.

RS-485 voltage levels are typically as follows:

• Logical "0" (Data Not Received): -3 to -15 volts
• Logical "1" (Data Received): +3 to +15 volts

These voltage levels enable compatible communication between RS-485 devices. Furthermore, RS-485 can support connections to up to 32 devices and extend communication distances depending on transmission speeds. As a result, RS-485 is commonly preferred in industrial automation systems.

RS-485 Characteristics RS-485 boasts the following characteristics:

1. Differential Communication: RS-485 represents data with the difference between positive and negative voltages, enhancing its resistance to noise.
2. High Speed and Long Distances: RS-485 can achieve high communication speeds and maintain extended transmission distances.
3. Support for Multiple Devices: RS-485 accommodates multiple devices using the same line.
4. Low Power Consumption: RS-485 consumes low power for data transmission, promoting energy efficiency.

In conclusion, RS-485 is a reliable choice for data transmission in industrial and commercial applications. Its differential voltage levels and other features enhance resistance to noise and enable long-distance communication. Therefore, RS-485 is widely used in automation systems and other industrial applications.