RS-485 is a standard for serial communication that allows multiple devices to communicate on the same bus. It is a differential voltage signaling standard, which means that it uses two wires to transmit data. This makes it less susceptible to noise than other serial communication standards, such as RS-232.
RS-485 is a half-duplex communication method, so, as such, only one device can transmit at a time. You can still use it to create a multi-drop network where multiple devices can share the same bus. You can utilize it in the following settings:
- Industrial automation: RS-485 is used in industrial automation and control systems to communicate between devices such as Programmable Logic Controllers (PLCs), sensors, and actuators
- Building automation: RS-485 is used to control Humidity Ventilation and Air Conditioning (HVAC) systems, as well as lights, security, and access control
- Medical equipment: RS-485 is used to communicate between devices such...