EIA-422
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EIA-422
(communications, standard)(Formerly "RS-422") An EIA
serial line standard which specifies 4-wire,
full-duplex, differential line, multi-drop
communications. The mechanical connections for this interface
are specified by EIA-449. The maximum cable length is
1200m. Maximum data rates are 10Mbps at 1.2m or 100Kbps at
1200m. EIA-422 cannot implement a truly multi-point
communications network (such as with EIA-485), although only
one driver can be connected to up to ten receivers. The best
use of EIA-422 is probably in EIA-232 extension cords.
Comparing EIA-422, 423, 449 to RS-232-C. Details on RS-232, 422, 423 and 485.
Comparing EIA-422, 423, 449 to RS-232-C. Details on RS-232, 422, 423 and 485.
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RS-422
A TIA/EIA standard for serial interfaces that extends distances and speeds beyond RS-232. RS-422 is a balanced system requiring more wire pairs than its RS-423 counterpart and is intended for use in multipoint lines. Both use either a 37-pin connector defined by RS-449 or a 25-pin connector defined by RS-530.RS-449 and RS-530 specify the pin definitions for RS-422 and RS-423. RS-422/423 specify electrical and timing characteristics. See RS-530.
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