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Introduction The PACSystems RX3i family provides advanced diagnostics and high performance I/O. With a modular design and multiple expansion options, RX3i is the perfect I/O solution for your process, hybrid, and discrete applications. Modular, High-Speed Performance RX3i is a rack-based system with a wide range of modules covering digital, analog, and numerous other specialty I/O types. These pluggable and hot-swappable modules allow you to customize the right mix of I/O, with a variety of voltage ranges and current capacities supported to meet all your application needs. Regardless of the I/O mix you choose, RX3i is built on high speed interfaces to provide rapid and consistent data transfer. Highly Scalable With the ability to pair I/O, RX3i allows you to scale your system with ease. In addition to I/O that you can put on the main rack, you can expand locally or remotely to connect to additional racks of I/O. In fact, RX3i can support as few as 8 I/O points and up to 32 thousand I/O points in a single system. With 7 to 16 slot backplanes and 1 slot expansion options, you can create the perfect system to fit your needs. Perfect Upgrade Path Emerson PACSystems RX3i gives you a simple migration path and offers a quick and painless upgrade plan from legacy systems like Series 90-30, 90-70, and RX7i. RX3i allows you to re-use Series 90-30 modules on RX3i backplanes, so you can upgrade your I/O system without disturbing wires or buying new I/O. Upgrading to RX3i provides improved communications with integrated Ethernet along with modern USB for serial or memory sticks. With a smaller form factor, higher capacity, and speeds over 100 times faster than legacy controls, RX3i is an easy and cost effective upgrade to protect your investment without disruption. Upgrade in hours, not days!