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A1SCPU

The A1SCPU is a compact and cost-effective CPU unit from Mitsubishi Electric’s MELSEC-A Series, designed for small to mid-range automation systems. It delivers reliable sequential control, logic processing, and basic data handling, making it suitable for industrial applications such as machinery control, conveyor systems, and simple process automation.

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Key Features
High-Speed Processing: Executes ladder logic and sequence programs efficiently.

Memory Capacity:

Program Memory: 8K steps (expandable via memory cassette).

Data Storage: Supports timers, counters, data registers, and internal relays.

I/O Expandability: Compatible with MELSEC-A series I/O modules (digital, analog, and special function units).

Communication Options:

Built-in RS-422/485 port for programming (via SC-09 cable) and peripheral device connectivity.

Supports Mitsubishi’s proprietary MELSECNET network for distributed control (with additional modules).

Durability: Industrial-grade design with robust noise resistance and wide operating temperature range.

3. Programming & Compatibility
Programming Software: Works with MELSEC MEDOC (legacy) or GX Developer (newer versions).

Language Support: Ladder logic (LAD), Instruction List (IL), and SFC (Sequential Function Chart).

Backup & Storage: Uses memory cassettes (A1S MEM-8/16K) for program backup and transfer.

4. Applications
Factory automation (e.g., packaging machines, assembly lines).

HVAC control systems.

Material handling and conveyor systems.

Legacy equipment upgrades (replacing relay-based controls).

5. Technical Specifications
Power Supply: 100–240V AC or 24V DC (model-dependent).

Operating Temperature: 0–55°C (32–131°F).

Dimensions: Compact form factor (varies by model).

Certifications: Complies with international industrial standards (CE, UL, etc.).

6. Legacy Status
The A1SCPU is part of Mitsubishi’s discontinued MELSEC-A series (replaced by Q/L/FX Series).

Still used in legacy systems but recommended to migrate to newer platforms for enhanced features and support.