The EPSCPE115 is the upper variant in the RSTi-EP CPE100 compact PAC family — a DIN-rail controller that packs PACSystems runtime capability into a form factor one-tenth the size of a traditional rack PLC. The 1.5MB of battery-less NVRAM retains the entire program and data set across power cycles, while the −40 to +70°C operating range eliminates the need for cabinet heating or cooling in outdoor installations.

How does the CPE115 differ from the CPE100?

Both controllers share the same 1GHz AM335x processor, 4-port Ethernet switch, and −40 to +70°C environmental rating. The CPE115 adds 50% more user memory (1.5MB vs 1MB) and DNP3 Outstation protocol with up to 8 concurrent master connections. If your application needs SCADA telemetry via DNP3 — common in electrical utilities and water/wastewater — the CPE115 is the minimum requirement. For general-purpose machine control without DNP3, the CPE100 delivers the same I/O and networking capability at lower cost.

What can LAN2 do?

LAN2's three switched RJ45 ports are software-configurable as either a second independent Ethernet interface or an embedded PROFINET I/O Controller. In PROFINET mode, LAN2 manages up to 8 distributed I/O devices with update rates from 16 to 512ms, supporting Media Redundancy Protocol (MRP) as both Manager and Client for ring-topology fault tolerance. In Ethernet mode, the three switched ports form a daisy-chain backbone for machine-level networking without an external switch.

How is it programmed and secured?

Programming uses PAC Machine Edition (PME) over Ethernet — the same software as the RX3i rack-based PACs, enabling code reuse across platforms. C blocks (32-bit, compiled with C Toolkit 8.10+) support custom algorithms and legacy code migration. On the security side, Secure Boot validates firmware at startup, Achilles Level 2 certification provides proven resistance to network-based attacks, and encrypted firmware updates prevent unauthorized code injection.

Frequently Asked Questions

Can the CPE115 control RSTi-EP slice I/O directly?

Yes. The embedded PROFINET Controller on LAN2 communicates with RSTi-EP PROFINET slice I/O (EP- series modules) as well as any standard PROFINET device. The CPE115 does not require a separate network adapter — the PROFINET controller is built into the CPU.

Does the CPE115 support Modbus RTU?

Yes. Both RS-232 and RS-485 serial ports support Modbus RTU Slave. However, note that these ports are non-isolated — use an external isolator when connecting to long cable runs or field devices.