Definitions for "RS485"
Similar to RS422 but is used in multi-point application where up to 64 network devices may be interconnected.
is a standard for half duplex data communications which is frequently used in multi-drop applications. Most commonly this is a 2-wire application. As many as 32 driver/receiver pairs can share a multidrop RS485 network. While many of the characteristics of RS485 are similar to RS422 the voltage range is greater.
Also a serial type of interface but of a balanced nature. Connectors may be 9 pin or 25 pin with non standard pinning patterns. In access control systems used mostly for point to point communications and up to 64 and sometimes even more devices can be interconnected at long distances at high speed.