Model 222N9 allows an RS-232 device with DB-9 port (now called EIA-574) to connect to an RS-422 device up to 4000 feet away over two twisted pair. Converters support data rates up to 19.2 kbps, Converter is line powered and require no AC power or batteries for operation. All handshaking lines are looped back.
222NRC is a dual rack card version of the Model 222N, with two converters in one card is available and is supportedin the 1000 series racks

222N9F
222N9M
222N9RJ45
222N9RJ11

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