GE-FanucIC600CB512Series Six Expanded Logic Control CPU Module — Model 600/6000 PLC Processor, Separate Memory Module Required

Product Description

What this part is

This is a central processor module for the GE Series Six family of programmable logic controllers — the Model 600 and Model 6000 platforms. It installs in the CPU slot of a Series Six CPU rack and executes the ladder program that runs the machine or process. GE marketed it as the Expanded Logic Control Module, and that name is where most of the confusion about this part begins.

Correcting the source data

Older listings for this part, including our own previous copy, described it as a board that “provides extended logic control capabilities,” which reads as though it were a piggyback expansion card that adds function to an existing processor. It is not. There is no separate CPU that this board plugs into and enhances. It is itself the CPU, one tier in a family of interchangeable-slot processors that GE offered at different capability levels. “Expanded” describes the instruction set and scan capability tier relative to the base processor, not physical expansion of anything.

Where it sits in the Series Six CPU family:
Knowing the family order matters when you are sourcing a replacement, because a plant that has a base processor cannot always drop in a higher tier without revisiting the program, and a plant that has a higher tier should not step down. The published family runs: IC600CB502 Logic Control, IC600CB512 Expanded Logic Control, IC600CB515 Expanded II Logic Control, IC600CB524 Arithmetic Control, IC600CB525 Advanced Logic Control, IC600CB526 Expanded Logic Control. This module is the second rung — a step above the base 502.

Why this board needs a separate memory module

This is the single most important fact for anyone buying a Series Six CPU, and it catches people out regularly. The CB512 carries no user memory. It will not store or run your ladder program on its own. Program storage lives on a separate memory module from the IC600CM5xx, IC600LR6xx or IC600LX6xx ranges, which installs alongside the processor. A CB512 delivered on its own to a plant expecting a working spare is a board that cannot run a machine. If you are building a shelf spare, buy the pair. We stock an IC600CM548A 8K CMOS logic memory module under SKU EG5#M6IYKK for exactly this reason — the two parts leave here together more often than either leaves alone.

Published ratings and environmental data

Platform: GE Series Six, Model 600 and Model 6000 programmable controllersFunction: central processor, Expanded Logic Control tierMounting: CPU slot of a Series Six CPU rackUser memory: none on board — separate memory module requiredOperating temperature: 0 to +60 °CStorage temperature: −20 to +70 °C

What is not published for this board

We would rather tell you what we do not know than guess. Backplane current draw and unit-load figures for this module are not published in any source we could verify. Neither is a definitive list of compatible rack part numbers, nor the jumper and DIP switch configuration on the board itself. The authoritative reference is GE publication GEK-25367E; if you have access to a copy through your plant documentation, use it for switch settings rather than trusting a dealer listing. Everything stated above comes from secondary Series Six data, not from a factory manual in our hands.

Revision suffixes and interchangeability

Suffix letters A, B, C and E appear across the IC600CB5xx family — IC600CB502E is documented, for instance. What is not published is a confirmed revision list specific to IC600CB512, or a change history explaining what differs between them. Treat the suffix as a board or firmware revision level. In this family revisions are generally interchangeable within the same base number, but we will not promise that, and if your machine builder specified a particular suffix on the parts list there was probably a reason. Match the base number IC600CB512 first; verify the suffix against your documentation if the application is critical.

Obsolescence and why a shelf spare is the economic decision:
The ownership trail buyers need to follow is GE Series Six, then GE Fanuc Automation, then GE Intelligent Platforms, then Emerson, which completed its acquisition of GE Intelligent Platforms in February 2019. This part is discontinued at every step of that chain. There is no factory replacement. The official migration path is PACSystems RX3i, which is a different platform — different racks, different I/O, different programming environment.

That migration is the reason the surplus market for these boards exists. Series Six controls are still running production in steel mills, paper machines, water and wastewater treatment plants and utility installations. Replacing one with RX3i is not a board swap; it is a rewire, a reprogram, a requalification and, on a plant of any size, a six-figure capital project with downtime attached. Against that number, keeping a known-good spare CPU in the crib is a rounding error. Plants that keep Series Six running are not being sentimental — they are making the correct financial call, and a spare on the shelf is what makes the call defensible when a board fails on a night shift.

Interchange guidance

Search terms and forms that refer to this same part include IC600CB512, IC600-CB-512, IC600CB512A and IC600CB512B, sold variously as GE, GE Fanuc and GE-Emerson. Do not cross it against IC600CB502, 515, 524, 525 or 526 without checking the program requirements — those are different capability tiers in the same slot, not equivalents. Available reman and surplus only.