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.
References in periodicals archive ?
Built-in Ethernet and serial communications ports (RS232, RS422 and RS485) support easier controller connectivity, while USB and microSD ports make file transfers easier.
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The controller can generate time and date codes internally, or receive marking data from other sources, via an RS232 interface, or optional RS422, TTY, Profibus, or Ethernet.
Suitable for fully automated- or stand-alone operation, the Ultimate PAH Automated Print & Apply System can be interfaced with networks and PCs using USB, Ethernet, RS422, RS485, and other popular connections.
With this feature serial devices (RS232, RS422, or RS485) can be wirelessly connected to an Ethernet network.
The input device is normally provided with an RS232 or RS422 serial communication port.
All nine products in this family are fully compatible upgrades to standard RS485 and RS422 transceivers and include many advanced features making them ideal for use in industrial, telecom and consumer applications.
The serial interface product group contains RS-232, RS422, RS-485, USB, Optical-Interface and Multiprotocol transceivers.
In an RS422 communication network, this means getting the four wires from the computer connected in the right order to the four terminals on the PLC or control module.
They interface with four-pair CAT3, CAT5, CAT5e, or CAT6 cables to send camera power and RS422 control signals, connecting all the necessary functions to and from the camera to the controller.
The control unit can easily be integrated into networks such as Sinec-L2/ET200, Interbus-S, Profibus, DeviceNet, CANBus, Modbus, RS485, RS422 or RS232C.
Also available are two Ultra-DMA 33 IDE interfaces, a pair of USB ports, dual serial I/O with optional RS422 drivers and a parallel port.