RS422
One of several standards that incorporate balanced line signals into DB connectors. A pair of wires is used to carry each signal. The data is encoded and decoded as a differential voltage between the two lines. (www.sangoma.com)
See Also: Serial Communications, I2C, RS232, RS485
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Product
RS-232, RS-422, or RS-485 to Fiber Optic Line Driver
Model 8277
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The Model 8277 is a unique asynchronous fiber optic modem whose optical interface can operate in either point to point or ring (daisy chain) configurations and whose electrical interface can also operate in point to point or multi-drop configurations depending on the user selected interface.
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Product
Mezzanine System
5033
System
ECM P/N 5033 provides eight channels of RS485 / RS422 I/O. The 110 ohm termination for each channel is enabled or disabled in software. Disabling termination saves power by eliminating unneeded or redundant termination. Speeds of up to 20 Mega bits per second are possible, but this design also features a 250K bits per second slower edge rate mode. The 250K bit mode is valuable when EMI is more of a concern and throughput is not important. All channels power up as inputs with the outputs disabled.
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Product
Dual-Port Isolated RS-422/485 Communications and Watchdog Card
WDG-2S
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This multifunction card contains a watchdog timer, two RS422/485 serial communications ports, and an internal temperature monitor and computer voltage monitor. This is a full-length card that installs in "long" expansion slots of IBM PC/XT/AT and compatible computers. The following paragraphs describe functions provided.
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Product
PXIe-8431/16, 16-Port, RS485/RS422 PXI Serial Interface Module
781473-02
Serial Interface
The PXIe‑8431/16 is a high-performance interface for high-speed communication with RS485 and RS422 devices. It features high-performance DMA transfers, multithreading, and multiprocessor support. You can also select between 4‑ and 2‑wire transceiver modes for full‑ and half‑duplex communication. NI serial interfaces also appear as standard COM ports for compatibility with programs that use serial communications.
