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(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.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)


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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References in periodicals archive ?
Summary: Chennai (Tamil Nadu) [India], Aug 1 (ANI): Ashok Leyland, a flagship company of the Hinduja Group and the country's second largest commercial vehicle manufacturer, has reported 45 per cent drop in its profit after tax at Rs 230 crore in the April to June quarter from Rs 422 crore in the same quarter of previous year.
The Media Coordinator has stated that the real figure of earning from Annual Examination 2018 is Rs 422 Million.
ISLAMABAD -- The Senate standing committee on power was Wednesday informed that that independent power producers (IPPs) were receiving huge amount of Rs 422 billion annually on account of capacity payments.
Ircon stock price at NSE opened at Rs 422, down 11 percent from its issue price of Rs 475.
Islamabad -- Public Accounts Committee dropped corruption inquiry against former Managing Directors of PSO including Tariq Kirmani for awarding a contract to a private company allegedly violating the prescribe rules which caused the loss of RS 422 million to national exchequer.
According to an official source, total cost of the Walled City project is Rs 422 million.
During the quarter, asset base of the banking system rose by 3.5 percent (Rs 422 billion) to reach Rs 12.5 trillion.
KARACHI, June 12 -- The Sindh government on Friday presented Rs 422 billion budget in the provincial assembly with a record development outlay of Rs 115 billion.
CO2 incubators are equipped with a color screen controller, communication interface RS 422, a digital, drift-free CO2 infrared absorption measurement system, and a tightly closing inner glass door.
NC Fadal is used with either RS 232 or RS 422 (32MP) protocols.
According to official sources, total cost of the Walled City project was Rs 422 million.