GE Fanuc PACSystems RX3i

The RX3i control system hardware comprises an RX3i universal backplane and up to seven Series 90-30 expansion or remote racks. Here are the key features and specifications of the RX3i:

Backplane and Rack Configuration: The RX3i universal backplane supports the placement of the CPU in any slot except for the last one, which is reserved for the serial bus transmitter IC695LRE001. The system accommodates Series 90-30 expansion or remote racks.
Programming Languages: The RX3i supports user-defined Function Blocks (LD logic only) and Structured Text programming.
Dual Bus Configuration: The RX3i universal backplane employs a dual bus that provides both high-speed PCI for advanced I/O throughput and a serial backplane for easy migration of existing Series 90-30 I/O.
Supported Modules: The system supports Series 90-30 Genius Bus Controller, Motion Control modules, and most Series 90-30/RX3i discrete and analog I/O with catalog prefixes IC693 and IC694. Modules with catalog prefixes IC695, including Ethernet and other communication modules, can only be installed in the universal backplane.
Redundancy Support: RX3i supports hot standby (HSB) CPU redundancy using redundancy CPU units (IC695CRU320) and Redundancy Memory Xchange (RMX) modules for redundancy links.
Communication Features: Communication options include Ethernet, PROFIBUS, PROFINET, Modbus TCP, Ethernet Global Data (EGD), DNP3, and serial protocols. The system supports embedded Ethernet interfaces on certain CPUs, with additional support for SRTP channels, Modbus TCP, and OPC UA Server in later firmware releases.
Ethernet Interface: The rack-based ETM001 Ethernet Interface module offers dual RJ-45 ports connected through an auto-sensing switch, supporting upload, download, online monitoring, SRTP channels, and Modbus TCP.
PROFIBUS and PROFINET Support: PROFIBUS communications are facilitated via the PROFIBUS Master module, while PROFINET communications are enabled through dedicated Controller and Scanner modules.
Additional Communication Modules: Modules such as IC695GCG001 (Genius Communications Gateway) and IC695EDS001 (DNP3 Outstation) expand communication capabilities.
Serial Communication: Serial communication modules like IC695CMM002 and IC695CMM004 enhance the system's serial communication capabilities.
Serial Ports: Various CPUs provide RS-232 and RS-485 serial ports for communication purposes.

Current Status:

Similar to the RX7i, While no longer in active production, the RX3i is a well-established PAC and you'll likely find them in use for many years to come. Emerson provides support and replacement parts for existing RX3i systems.

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