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2. RS-485 - Wikipedia

   en.wikipedia.org/wiki/RS-485

   RS-485 does not specify any connector or pinout. Circuits may be terminated on screw terminals , D-subminiature connectors, or other types of connectors. The standard does not discuss cable shielding but makes some recommendations on preferred methods of interconnecting the signal reference common and equipment case grounds.

3. RS-232 - Wikipedia

   en.wikipedia.org/wiki/RS-232

   RS-485 is a multiple-access bus on which only one device can transmit at a time, a concept that is not provided for in RS-232. The RS-232 device asserts RTS to tell the converter to take control of the RS-485 bus so that the converter, and thus the RS-232 device, can send data onto the bus.

4. EIA-530 - Wikipedia

   en.wikipedia.org/wiki/EIA-530

   Currently known as TIA-530-A, but often called EIA-530, or RS-530, is a balanced serial interface standard that generally uses a 25-pin connector, originally created by the Telecommunications Industry Association. Finalized in 1987 (revision A finalized in 1992 [1]), the specification defines the cable between the DTE and DCE devices.

5. 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 ...

6. RS-422 - Wikipedia

   en.wikipedia.org/wiki/RS-422

   When used in relation to communications wiring, RS-422 wiring refers to cable made of 2 sets of twisted pair, often with each pair being shielded, and a ground wire. While a double-pair cable may be practical for many RS-422 applications, the RS-422 specification only defines one signal path and does not assign any function to it.

7. Data Carrier Detect - Wikipedia

   en.wikipedia.org/wiki/Data_Carrier_Detect

   Data Carrier Detect (DCD) or Carrier Detect (CD) is a control signal present inside an RS-232 serial communications cable that goes between a computer and another device, such as a modem. This signal is a simple "high/low" status bit that is sent from a data communications equipment (DCE) to a data terminal equipment (DTE), i.e., from the modem ...