ST-GT-422-XXP

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Modular I/O
Programmable Gateways


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Note:

Although this gateway is still available, other SIXNET DCS controllers are recommended for new designs where programmability is required. The ST-GT-1210 I/O Controller functionally replaces the ST-GT-422-xxP programmable gateway in applications requiring two wire RS485 communication. For even higher performance or to satisfy larger memory or COM port requirements, use a SixTRAK IPm.

Select a ST-GT-422-xxP when…

…the connection to the primary host (supervisory computer or distributed control system) will be an RS422 or RS485 link.

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Key Features

¢	32-bit CPU for real-time power and floating point math
¢	The Main Port on the ST-GT-422-xxx is optically isolated from the gateway circuitry for high immunity to ground loops and other types of noise.
¢	RS485 uses differential transmissions similar to RS422, but supports party-line (multidrop) connections. Either one or two pairs of wires can be used. RS485 stations alternately send and receive.
¢	Simultaneous communications from each port are possible. (Use a laptop PC for on-the-fly diagnostics.)
¢	Every SixTRAK station requires a gateway to perform I/O updating, communicate with the outside world and power the ST-Bus. There can be only one gateway in each station.
¢	Control tasks can be divided between a computer and a programmable gateway to best suit your application. I/O registers may be used to link the two programs together.
¢	1 megabyte of flash (permanent) memory ensures program expandability.
¢	256K, 1 MB, or 2 MB of battery backed memory for datalogging applications.