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2. RS-485 - Wikipedia

   en.wikipedia.org/wiki/RS-485

   RS-485, also known as TIA-485(-A) or EIA-485, is a standard, originally introduced in 1983, defining the electrical characteristics of drivers and receivers for use in serial communications systems. Electrical signaling is balanced , and multipoint systems are supported.

3. eBUS (serial buses) - Wikipedia

   en.wikipedia.org/wiki/EBUS_(serial_buses)

   The eBUS 2-wire interface is an asynchronous serial port with active-low voltage that exchanges 8-bit bytes with start and (single) stop bits (no parity bit), at a symbol rate of 2400 baud, and can be implemented with a standard UART plus a voltage converter.

4. Modbus - Wikipedia

   en.wikipedia.org/wiki/Modbus

   On the physical layer, MODBUS over Serial Line performs its communication on bit by RS485 or RS232, with TIA/EIA-485 Two-Wire interface as the most popular way. RS485 Four-Wire interface is also used. TIA/EIA-232-E (RS232) can also be used but is limited to point-to-point short-range communication. [20]

5. Serial Peripheral Interface - Wikipedia

   en.wikipedia.org/wiki/Serial_Peripheral_Interface

   Motorola's original specification (from the early 1980s) uses four logic signals, aka lines or wires, to support full duplex communication. It is sometimes called a four-wire serial bus to contrast with three-wire variants which are half duplex, and with the two-wire I²C and 1-Wire serial buses.

6. Universal asynchronous receiver-transmitter - Wikipedia

   en.wikipedia.org/wiki/Universal_asynchronous...

   The electric signaling levels are handled by a driver circuit external to the UART. Common signal levels are RS-232, RS-485, and raw TTL [1] for short debugging links. Early teletypewriters used current loops. It was one of the earliest computer communication devices, used to attach teletypewriters for an operator console.

7. List of EIA standards - Wikipedia

   en.wikipedia.org/wiki/List_of_EIA_standards

   EIA/TIA-455-87B FOTP-87 Fiber Optic Cable Knot Test; EIA/TIA-455-188 FOTP-188 Low Temperature Testing of Fiber Optic Components; EIA-476 Date Code Marking; EIA-RS-481 Taping/Leadless Components for Automatic Placement; RS-485 Electrical Characteristics of Generators and Receivers for Use in Balanced Digital Multipoint Systems (serial data ...