Mitsubishi A2ACPU MELSEC PLC System Kit
This Mitsubishi MELSEC A series PLC system kit provides a complete control solution, integrating the A2ACPU CPU module, A63P power supply unit, AY13E transistor output module, and two AX82 DC input modules. This configuration is designed to deliver reliable and flexible control for medium‑scale industrial automation applications, including packaging, material handling, and machine tool control. The system architecture is based on the well‑established MELSEC A series, known for its robustness and ease of maintenance.
The A2ACPU serves as the central processing unit, offering high‑speed instruction execution and ample program memory. The A63P power supply module ensures stable voltage delivery to the entire rack, while the AX82 input modules (two units, providing 16 inputs each) handle digital signals from sensors and pushbuttons. The AY13E output module (providing 12 transistor outputs) actuates solenoids, motor contactors, and indicator lights. Together, these components form a balanced, pre‑coordinated system ready for integration into a control cabinet.
Component Specifications
A2ACPU (CPU Module): Program capacity 14k steps, execution speed 0.2 µs per basic instruction, built‑in RS‑232 port, up to 2048 I/O points (with expansion).
A63P (Power Supply Module): Input 100‑240 V AC, output 5 V DC / 6 A, 24 V DC / 1 A (for output devices), overload and overvoltage protection.
AX82 (DC Input Module) – 2 units: 16 input points per unit (total 32 inputs), 24 V DC, sink/source configurable, input current 4 mA, response time 10 ms.
AY13E (Transistor Output Module): 12 output points, 12‑24 V DC, 0.5 A per point, short‑circuit protection, response time < 1 ms.
Backplane requirements: Standard MELSEC A series base rack (e.g., A5B, A3B) with appropriate slot count.
System Performance and Capabilities
Scalable I/O: The system can be expanded with additional analog, positioning, and communication modules as application needs grow.
High‑speed logic processing: The A2ACPU handles complex sequencing, interlocking, and arithmetic operations without noticeable scan‑time delays.
Data retention: Battery‑backed RAM ensures program and register data are preserved during power outages.
Diagnostic functions: The CPU and power supply modules feature status LEDs (RUN, ERR, ALARM) for quick system health checks.
Typical Applications for This Configuration
Palletizing and conveying: Managing conveyor zones, diverters, and stacker controls using digital sensors and actuators.
Assembly stations: Coordinating pneumatic cylinders, vibration feeders, and verification sensors.
Packaging lines: Controlling sealing bars, film feeds, and rejection mechanisms.
Small process skids: Monitoring tank levels with discrete level switches and controlling pump starters.
Installation and Wiring Overview
Install each module into the appropriate slots of the MELSEC A series base rack. The A63P power supply must be installed in the leftmost slot. The CPU module (A2ACPU) is placed adjacent to the power supply, followed by the input and output modules in any order (allocation is determined by slot position). Wiring to the AX82 input modules requires a 24 V DC common connection and individual sensor wires. For the AY13E output module, connect the load supply (12‑24 V DC) to the common terminal and wire the load between the output terminal and the supply. All connections should be made with ferrules and properly torqued terminals. System grounding must be provided via the base rack’s grounding terminal.
Software and Programming
The A2ACPU is programmed using Mitsubishi’s GX Developer or GX Works2 software. Ladder logic, instruction list, and sequential function chart (SFC) languages are supported. The software allows full online monitoring, forcing, and program modification. I/O addresses are automatically assigned based on slot positions, and the configuration is stored in the CPU’s memory. A backup of the program and parameters should be made using the software and an external memory card (if equipped).
Compliance and Reliability
All modules in this system are CE marked and UL recognized. They are designed for operation in pollution degree 2 environments, with temperature ranges of 0°C to +55°C. The system complies with EMC directives for industrial equipment.
Conclusion
This Mitsubishi A2ACPU‑based PLC system kit offers a dependable, proven foundation for a wide range of industrial controls. The combination of the high‑performance CPU, stable power supply, and flexible digital I/O ensures that engineers can build a solution that balances capability with cost‑effectiveness for medium‑scale automation projects.
