The Emerson PACSystems RX3i CPE302 (ordering code IC695CPE302) is a rack-mount CPU for the PACSystems RX3i platform — a full-size programmable automation controller that plugs into the RX3i universal backplane. With a 1.1GHz processor, 2MB of battery-free user memory, and an embedded OPC-UA Server alongside traditional industrial protocols, it represents the current-generation RX3i processor for mid-to-large automation applications.

How does the CPE302 differ from the RSTi-EP CPE200 compact controllers?

While both carry the PACSystems branding and share the same programming toolchain (Machine Edition, Ladder/FBD/ST/C), the CPE302 is a rack-mount CPU for the full-size RX3i I/O ecosystem — IC694 and IC695 modules in a backplane — whereas the CPE200 series are compact DIN-rail controllers for RSTi-EP slice I/O. The CPE302 runs at 1.1GHz (vs the CPE200's embedded 32-bit processor), supports the IC695CEP001 PROFINET carrier for remote I/O, and provides USB 2.0 master for removable data storage devices. Reference tables scale to 16K-bit discrete and 16K-word analog.

What communication protocols does it support?

The 10/100 Ethernet port handles Modbus TCP, SRTP Client/Server, OPC-UA Server, and EGD (Ethernet Global Data). The RS-232 serial port adds Modbus RTU Slave, SNP Slave, and Serial I/O. An embedded OPC-UA Server — increasingly required for Industry 4.0 and IIoT applications — provides secure, encrypted data access to SCADA, MES, and cloud platforms without a separate gateway. The CPE302 also supports the IC695CEP001 PROFINET I/O-Device carrier for connecting RX3i to PROFINET controllers as a remote I/O station. Eight status LEDs, internal temperature monitoring, and a real-time clock with coin-battery backup are standard. Firmware 9.40 or later is required.