| Component | Model | Reason | | :--- | :--- | :--- | | CPU | FX5U-32M | Built-in 16 in / 16 out, Ethernet, RS-485 | | Input expansion | FX5-8EX | Adds 8 inputs → total 24 | | Output expansion | FX5-8ER | Adds 8 relay outputs → total 24 (18 used) | | Analog input | FX5-4AD | 4 channels (3 used) | | Modbus | Use built-in RS-485 | Channel 2 configured as Modbus RTU | | HMI connection | Ethernet port | Direct connection | Automation Engineer Last updated: [Insert Date] Next review: Upon new FX5U firmware release or hardware revision.
| Model | Total I/O Capacity | Program Memory | Built-in Analog | Built-in Comms | Best For | | :--- | :--- | :--- | :--- | :--- | :--- | | | 256 pts | 64 KB | None | RS-485, Ethernet, USB | Small machines, <64 I/O | | FX5U-64M | 256 pts | 128 KB | None | RS-485, Ethernet, USB | Medium machines, 64-128 I/O | | FX5U-80M | 256 pts | 128 KB | None | RS-485, Ethernet, USB | Larger I/O count but simple logic | | FX5UC-32M | 256 pts | 64 KB | None | RS-485, Ethernet, USB | Compact (connector type) panels | Note: FX5U models support up to 512 I/O with network remote I/O (CC-Link IE Basic). 2. Application Requirements Checklist Use this table to assess your needs before selecting expansion modules. fx5u selection tool
Purpose: To systematically determine the optimal FX5U CPU model, expansion modules, and network configuration based on application requirements. 1. CPU Selection Matrix (Core Decision) Choose the base CPU model based on I/O count, program size, and built-in analog requirements. | Component | Model | Reason | |
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