| 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 metres (4000 feet) |
| Mode of Operation |
Single Ended (Unbalanced) |
| Maximum Baud Rate |
Up to 100Kbps |
| Voltage Levels |
-6V to +6V (maximum Voltage) |
| Mark(1) |
-4V to -6V |
| Space(0) |
+4V to +6V |
| Available Signals |
Tx, Rx & GND |
RS/EIA/TIA-423 is a standard for serial communications. It defines an unbalanced (single-ended) interface (similar to RS-232), with a single, unidirectional sending driver, and allows for up to 10 receivers (similar to RS-422). It is normally implemented in integrated circuit technology and can also be employed for the interchange of serial binary signals between DTE & DCE. There is no common pinout for RS-423. The BBC Micro computer used a 5-pin DIN connector. DEC used it extensively with a Modified Modular Jack connector. This was sometimes called "DEC-423".
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