B&R 3CP340.60-2 CPU Unit | System 2005 PCC, Pentium 166, 32 MB DRAM

Description

The B&R 3CP340.60-2​ is a CPU unit manufactured by B&R Industrial Automation—Bernecker + Rainer, now part of the ABB Group—and belongs to the System 2005​ family of Programmable Computer Controllers (PCC). It is the deterministic computing engine of a 2000s-era B&R machine cell: a 166 MHz Intel Pentium-class processor with 32 MB of DRAM and 512 kB of battery-backed SRAM, housed in a fanless, sealed metal brick that slots into a 3BP-series backplane alongside aPCI expansion cards .

Unlike a conventional micro-PLC, 3CP340.60-2​ does not force a choice between “real-time enough” and “powerful enough.” It runs IEC 61131-3 logic cycles with microsecond-class determinism while simultaneously handling recipe parsing, string and floating-point math, motion coordination, and fieldbus master duties—all on a single DIN-rail-mountable module . The operating system is B&R’s own real-time OS (Automation Runtime / AROS), not Windows, so there is no desktop background, no patch Tuesday, and no hard disk to fail in a vibrating cabinet. To a maintenance engineer this means one practical thing: the program and the operating system live on a removable CompactFlash card, so a failed controller is recovered by swapping the card, not by reinstalling an image on a factory floor.

Application Scenarios

A European packaging OEM was retrofitting a fleet of servo-driven flow wrappers originally deployed in 2006. The controllers were at end of life, but the mechanical platform and the motion profiles were still perfectly viable—scrapping the line was not an option. The engineering team chose the B&R 3CP340.60-2​ as a direct-fit replacement inside the original System 2005 station chassis. Because the module carries a Pentium 166 processor and 32 MB of DRAM, it absorbed the legacy Automation Studio project with zero logic rewrite; the onboard CompactFlash slot allowed the integrator to clone the validated application image across all 14 machines in under an hour . The RS232 port was reused for a legacy vision-system link, and the 100BASE-T Ethernet uplinked cleanly to the plant MES.

Downtime per machine dropped from a projected three-day re-panel to a half-day swap, and the season’s production target was met. But the quieter gain was diagnostic. Before the swap, a “CPU fault” alarm meant “open the cabinet and guess.” After, the controller exposed task-cycle margin, communication error counters, and servo-following error to the HMI—the kind of visibility that turns a 4 a.m. emergency call into a scheduled Tuesday morning. For a machine that runs 20 hours a day, six days a week, 3CP340.60-2​ is not a component. It is the difference between a line that stops and a line that tells you why it almost stopped.

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