RS-423 is similar to TIA/EIA-232-F, but features a reduced driver output swing and higher data rates.
RS-423 is an electrical standard, specifying driver and receiver requirements only - there is no common pinout for this interface. Unbalanced driver and a balanced receiver defined. The receivers’ requirements are identical to specified in TIA/ EIA-422-B standard. TIA/EIA-423-B is intended to be referenced by complete standards, such as TIA/EIA-530-A. TIA/ EIA-423-B specifies a unidirectional, multidrop (up to ten receivers) interface. Advantages over TIA/EIA-232-F include: multiple receiver operation, faster data rates, and common power supplies (typically ±5V).
|Mode of Operation||SINGLE - ENDED||DIFFERENTIAL|
|Total Number of Drivers and Receivers on One Line||1 DRIVER
|Maximum Cable Length||4000 FT.||4000 FT.|
|Maximum Data Rate||100kb/s||10Mb/s|
|Maximum Driver Output Voltage||+/-6V||-0.25V to +6V|
|Driver Output Signal Level (Loaded Min.)||Loaded||+/-3.6V|
|Driver Output Signal Level (Unloaded Max)||Unloaded||+/-6V|
|Driver Load Impedance (Ohms)||>450||100|
|Max. Driver Current in High Z State||Power On||N/A|
|Max. Driver Current in High Z State||Power Off||+/-100uA|
|Slew Rate (Max.)||Adjustable||N/A|
|Receiver Input Voltage Range||+/-12V||-10V to +10V|
|Receiver Input Sensitivity||+/-200mV||+/-200mV|
|Receiver Input Resistance (Ohms)||4k min.||4k min.|