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.

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References in periodicals archive ?

With the UltraPort SI, Perle is the first vendor to incorporate EIA-232, EIA-422 and EIA-485 interfaces on a single PCI serial card and provide the ability to individually configure each interface type using software commands.

Perle Systems Unveils World's First Software-Configurable Multi-Interface Multi-Port Serial PCI Cards

Numerous interfaces are available, including EIA-232, EIA-422, EIA-485, J1708, Ethernet and Power-over-Ethernet.

XATA Adds TREQ(R)-M4 In-Cab Color Display

The Avanstar family of high-speed serial boards is software configurable, supporting any combination of EIA-232 and EIA-422 interfaces from a single expansion slot.