RS-422 is typically used for point-to-point connections, while RS-485 offers the ability to connect up to 32 communication modules on a single network. This distance or the quantity of devices may vary depending on the equipment manufacturer. between devices, without the use of repeaters, which can extend that distance. Both RS-422 and 485 provide communications out to 4,000 ft. In both types of networks, transceiver modules are typically connected using single twisted copper pairs, and a separate signal ground conductor.
The two most commonly used serial protocols are RS-422 and RS-485. These data protocols transmit using asynchronous data communications, meaning that the data is sent one bit at a time, as shown in the diagram. Helping Your Security Customers Rebound.TMA Monitoring Center Excellence Awards.
