MITSUBISHI AX81 – Programmable Controller Communication Module | MELSEC-A Series Platform
Engineering Background
The MITSUBISHI AX81 is a dedicated communication module engineered for the MELSEC-A Series Programmable Logic Controller (PLC) platform — one of Mitsubishi Electric’s most widely deployed industrial automation architectures. Designed to extend the data exchange capabilities of A-Series CPU units, the AX81 enables reliable, high-speed communication between PLCs, host computers, and peripheral devices in demanding industrial environments.
Product Positioning
Targeted at procurement engineers and system integrators managing legacy MELSEC-A installations, the AX81 provides a proven, OEM-sourced solution for maintaining communication integrity in production lines, process control systems, and factory automation networks. Konmask.com supplies verified AX81 modules with full traceability, supporting both MRO (Maintenance, Repair & Operations) and new system build-outs.
Complete Technical Specifications
- Part Number / SKU: AX81
- Manufacturer: MITSUBISHI Electric Corporation
- Series / Platform: MELSEC-A Series
- Module Type: Programmable Controller Communication Module
- Country of Origin: Japan
- Weight: 1,340 g (approx.)
- Communication Function: Data link / host interface communication for MELSEC-A CPU units
- Mounting: MELSEC-A Series base unit slot-mount
- Operating Temperature: 0°C to 55°C (standard industrial range)
- Storage Temperature: -20°C to 75°C
- Relative Humidity: 5% to 95% RH (non-condensing)
- Power Supply: Supplied via backplane from A-Series base unit
- Compliance: CE, UL (subject to specific lot verification)
Proven Application Environments
- Automotive assembly line PLC networks requiring host-computer data exchange
- Steel and metal processing plants with MELSEC-A distributed control systems
- Chemical and petrochemical process control using legacy A-Series infrastructure
- Food and beverage production lines with existing MELSEC-A CPU installations
- Semiconductor fab equipment interfacing with supervisory SCADA systems
- MRO replacement for failed or end-of-life AX81 modules in active production
Engineering Advantages
- Seamless MELSEC-A Integration: Drop-in compatible with existing A-Series base units — no firmware modification required for standard deployments.
- Robust Industrial Design: Built to Mitsubishi Electric’s industrial-grade standards, ensuring long-term reliability in high-vibration and high-EMI environments.
- Proven Legacy Support: Maintains communication continuity for MELSEC-A systems that remain in active service across global manufacturing facilities.
- OEM Authenticity: Sourced directly from verified supply chains — not refurbished or third-party clones — ensuring full specification compliance.
- Reduced Downtime Risk: Ready-to-ship inventory minimizes production halt duration during unplanned module failures.
System Architecture & Signal Flow
The AX81 installs into a dedicated I/O slot on the MELSEC-A Series base unit. It interfaces directly with the A-Series CPU via the internal backplane bus, handling communication protocol processing independently of the CPU’s main scan cycle. Data exchange with external host computers or peripheral devices is managed through the module’s onboard communication controller, reducing CPU load and ensuring deterministic data transfer timing. The module supports the MELSEC communication protocol (MC Protocol predecessor) standard used across the A-Series ecosystem.
Sourcing & Quality Verification
- Source: Authorized and verified industrial surplus / OEM distribution channels
- Inspection: Each unit undergoes visual inspection and functional verification prior to shipment
- Traceability: Lot documentation available upon request for regulated industries
- Packaging: Anti-static ESD packaging with protective foam insert
- Warranty: 90-day operational warranty against manufacturing defects
Procurement Process
- Confirm Compatibility: Verify your MELSEC-A base unit model and available slot type before ordering.
- Request a Quote: Contact support@konmask.com with your required quantity and delivery timeline.
- Order Confirmation: Receive proforma invoice with lead time and shipping options (DHL / FedEx / sea freight).
- Quality Documentation: Request inspection report or lot certificate if required by your QA process.
- Delivery & Installation: Modules shipped in ESD-safe packaging; installation guide available upon request.
Technical FAQ
Q: Is the AX81 compatible with MELSEC-Q or MELSEC-L Series base units?
A: No. The AX81 is designed exclusively for the MELSEC-A Series platform. For Q-Series or L-Series applications, different communication modules are required.
Q: Can the AX81 be used as a direct replacement for a failed unit without reprogramming?
A: In most standard configurations, yes — the AX81 is a hardware-level replacement. However, communication parameters stored in the CPU program should be verified post-installation.
Q: What communication protocols does the AX81 support?
A: The AX81 supports the MELSEC-A Series native communication protocol for host-link and data link applications. Consult the original Mitsubishi AX81 hardware manual for full protocol specifications.
Q: Do you provide a datasheet or hardware manual?
A: Yes. Contact support@konmask.com to request the original Mitsubishi AX81 technical documentation.
Q: What is the lead time for AX81 modules?
A: In-stock units typically ship within 1–3 business days. Contact us for current stock status and bulk order lead times.
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