The IC694CHS392, produced by Emerson Automation and originally developed by GE Fanuc, is a 10-slot serial expansion baseplate designed for the PACSystems RX3i Programmable Automation Controller (PLC) platform. It serves as an extension rack that connects to the main baseplate through an I/O expansion cable with a maximum supported length of 15 meters (50 feet), enabling flexible system expansion in distributed control environments. Compatible with standard RX3i I/O modules, the IC694CHS392 provides dependable mechanical and electrical support for additional modules while maintaining stable communication and power distribution across the system. This expansion baseplate may be utilized in automation setups across North America, Europe, Asia, and worldwide, where scalable architecture and reliable rack-to-rack connectivity are critical for advanced industrial control applications.