Description

RS-485 is one of the most widely used wired interface for industrial long-haul networks. TIA/EIA-485-A standard defines the physical layer of the RS-485 interface. End applications use RS-485 interface coupled with protocol such as Profibus, Modbus or BACnet.

The main benefits of this interface include:

1. Balanced differential signaling allows for rejection of common mode noise and facilitates communications over long distances in noisy industrial environments.
2. Support of -7 to 12V wide common mode range allows for multipoint data transmission between nodes located at different ground potential difference.
3. Data rates up to 50 Mbps at short distances or communications distance up to 1000 meters at slower data rates is possible.

Applications for RS-485 include Energy Meters, Grid Protection relay, Solar inverter, Factory automation, Motor control and Heating, ventilation, air conditioning (HVAC) systems.