RS-423
RS-423, also known as TIA/EIA-423, is a technical standard originated by the Electronic Industries Alliance that specifies electrical characteristics of a digital signaling circuit. Although it was originally intended as a successor to RS-232C offering greater cable lengths, it is not widely used.
| RS423 | |
|---|---|
| Standard | EIA RS-423 |
| Physical Media | Group of copper cables |
| Network Topology | Point-to-point, Multi-dropped |
| Maximum Devices | 10 (1 driver & 10 receivers) |
| Maximum Distance | 1200 meters (4000 feet) |
| Mode of Operation | Single-ended (unbalanced) |
| Maximum Baud Rate | Up to 100kbit/s |
| Voltage Levels | -6V to +6V (maximum) |
| Mark(1) | -4V to -6V |
| Space(0) | +4V to +6V |
| Available Signals | Tx, Rx, GND |
| Connector types | Not specified |
RS-423 systems can transmit data on cables as long as 1,200 meters (3,900 ft). It is closely related to RS-422, which used the same signaling systems but on a different wiring arrangement: RS-423 differed primarily in that it had a single return pin instead of one for each data pin.
RS-423 specifies an unbalanced (single-ended) interface, similar to RS-232, with a single, unidirectional sending driver, and allowing for up to 10 receivers. It is normally implemented in integrated circuit technology and can also be employed for the interchange of serial binary signals between DTE & DCE.