Schneider 140CPU21304
1. Overview
2. Specifications
- RAM: 768KB (also specified as 256KB, please verify the specific version)
- User Area: 64KB
- Data Area: 64KB
- Local I/O: Maximum 64 inputs, 64 outputs
- Remote I/O: Maximum 64 inputs, 64 outputs (supports distributed I/O)
- Remote Drop: Up to 31 units
- Modbus (RS-232): 1 x 9-pin D-sub connector
- Modbus Plus (RS-485): 1 x 9-pin D-sub connector

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3. Product Features
- High-Performance Isolation Technology: Eliminates electrical noise interference, suitable for high electromagnetic interference environments.
- High Current Output: Capable of driving larger loads without the need for external relays.
- Flexible I/O Distribution: Supports local, remote, and distributed I/O configurations to meet complex network layout requirements.
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4. Structure and Composition
5. Application Fields
- Discrete Control: Machine control, packaging machinery.
- Process Control: Production lines requiring high-precision control.
- Large-Scale Distributed Systems: Supports multiple networks and remote I/O, suitable for large-scale factory automation.
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6. Installation and Maintenance
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