GE Fanuc IC600CB526 / IC600CB527 Series Six Expanded Logic and I/O Control Boards
A comparison of the Expanded Logic Control board and the separate I/O Control board.
Product Overview
GE Fanuc IC600CB526 and IC600CB527 divide Series Six CPU work between expanded logic execution and control of the main I/O communication path.
Both reside in the Series Six CPU environment and participate in the control scan, but one determines logic capability while the other manages I/O communications.
IC600CB526: Expanded Logic Control board for the expanded function set.
IC600CB527: I/O Control board governing the main CPU I/O path.
Technical Specifications
| Brand | GE Fanuc |
|---|---|
| Model | IC600CB526 / IC600CB527 |
| Product Type | Logic and I/O Control Boards |
| Country | United States |
| Platform | Series Six |
| IC600CB526 | Expanded Logic Control |
| IC600CB527 | I/O Control |
| Logic role | Expanded instruction execution |
| I/O role | CPU-to-I/O chain control |
| Replacement | Preserve board role and revision |
| IC600CB526 role | Expanded instruction processing |
| IC600CB527 role | Main I/O chain control |
| Installation | Series Six CPU board positions |
Logic and I/O Functions
IC600CB526 executes the expanded Series Six logic functions contained in the controller program.
IC600CB527 manages the CPU's exchange with the main I/O chain, keeping field-data transfer separate from the logic board's instruction processing.
Separating expanded logic from the main I/O-control path allows program execution and rack data transfer to occupy their documented Series Six CPU functions.
Scan and I/O Integration
Expanded instructions are executed on IC600CB526 before the resulting controller states are passed through the I/O-control function.
IC600CB527 then manages the main I/O-chain exchange, including the addressing and rack sequence expected by the Series Six CPU.
The main I/O-chain address and rack sequence define how IC600CB527 exchanges field data, while the saved program determines the work executed by IC600CB526.
IC600CB526 / IC600CB527 FAQ
Is IC600CB527 another logic board for IC600CB526 / IC600CB527?
No. It is the I/O Control board; CB526 is the Expanded Logic Control board.
Why must the function set be recorded for IC600CB526 / IC600CB527?
The installed logic board determines available instruction capabilities and compatibility.
What is tied to the I/O Control board for IC600CB526 / IC600CB527?
Main I/O chain communication, addressing and CPU I/O exchange depend on its correct configuration.
Can either board be hot-swapped for IC600CB526 / IC600CB527?
No. Power down the Series Six CPU before removing or installing boards and cables.
What tests cover both boards for IC600CB526 / IC600CB527?
Run CPU diagnostics, exercise expanded instructions and prove the complete input/output scan path.
Which I/O record should accompany IC600CB526 / IC600CB527?
Keep the main I/O chain addresses, rack sequence and module map with the expanded-logic program archive.
I/O control continuity
For mature rack systems, replacement discussions include the I/O chain role and the surrounding CPU configuration rather than relying on front-panel appearance alone.
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