The Emerson PACSystems RSTi-EP CPE220 (EPXCPE220) sits at the upper mid-range of the CPE200 compact IIoT PAC family. With 2MB of battery-less NVRAM, DNP3 outstation protocol, and capacity for 32 local RSTi-EP slices plus 32 remote PROFINET devices, it serves larger machine control programs that need more memory than the CPE215 without requiring the full 64-module capacity of the flagship CPE240.

How does the CPE220 differ from the CPE215?

The primary difference is user memory: 2MB versus 1.5MB on the CPE215 — a meaningful increase for applications with extensive recipe storage, data logging, or complex sequencing. Both models share the same I/O capacity (32 local slices, 32 PROFINET devices), DNP3 outstation support, and three Gigabit Ethernet ports. The embedded PROFINET controller on LAN2 handles up to 32 devices, while LAN1 connects to the plant network for OPC UA Secure data access and Modbus TCP integration.

Where does the CPE220 fit in real-world applications?

The CPE220 suits machines and skids that run substantial control programs — packaging lines, pumping stations with DNP3 telemetry, mid-size material handling systems — where the CPE215's 1.5MB would be tight but the CPE240's 64-slice capacity is unnecessary. Like all CPE200 controllers, it shares the RX3i runtime and toolchain, operates from −40°C to +70°C, and carries Achilles Level 2, ATEX Zone 2, and marine certifications.