Factory Automation Expansion Solution – Mitsubishi Electric A1S52B | MELSEC-A Series
Where This Product Is Used
The Mitsubishi Electric A1S52B is a 5-slot extension base unit designed for the MELSEC-A Series programmable logic controller platform. It is widely deployed across demanding industrial environments where I/O capacity must be expanded beyond the main base unit:
- Automotive Manufacturing: Body welding lines, paint shop conveyors, and assembly transfer systems requiring high-density I/O expansion.
- Food & Beverage Processing: Bottling, filling, and packaging lines where hygienic-area control panels demand compact rack solutions.
- Pharmaceutical Production: Batch process control systems with strict traceability and redundant I/O requirements.
- Material Handling & Logistics: Sortation conveyors, palletizers, and automated storage/retrieval systems (AS/RS).
- Water & Wastewater Treatment: Pump station control panels and SCADA-integrated remote I/O expansion racks.
- Semiconductor & Electronics Fabrication: Clean-room equipment controllers requiring modular, slot-expandable architectures.
Technical Specifications
| Part Number / SKU | A1S52B |
| Manufacturer | Mitsubishi Electric |
| Series | MELSEC-A (A-Series) |
| Product Type | Extension Base Unit (Expansion Rack) |
| Number of Extension Slots | 5 slots |
| Compatible CPU Series | MELSEC-A Series (AnS, A1S, A2S, A3S CPUs) |
| Connection Method | Extension cable to main base or preceding extension base |
| Mounting | DIN rail or panel mount |
| Weight | 1,380 g |
| Operating Temperature | 0 °C to 55 °C |
| Storage Temperature | –20 °C to 75 °C |
| Relative Humidity | 5% to 95% RH (non-condensing) |
| Vibration Resistance | Per JIS B 3502 / IEC 61131-2 |
Why Engineers Specify This Model
- Proven MELSEC-A Platform Compatibility: Direct plug-and-play expansion for existing A1S, A2S, and AnS CPU systems — no firmware changes required.
- 5-Slot Density: Maximizes I/O module count per rack footprint, reducing panel space and wiring complexity.
- Robust Industrial Construction: Designed to IEC 61131-2 environmental standards for vibration, shock, and temperature extremes common in factory floors.
- Daisy-Chain Expansion: Multiple A1S52B units can be cascaded to further extend system I/O capacity as production lines scale.
- Long-Term Spare Parts Availability: Critical for MRO (Maintenance, Repair & Operations) programs supporting legacy MELSEC-A installations with 10–20 year lifecycles.
Complete System Bill of Materials
A typical MELSEC-A extension rack assembly using the A1S52B includes:
- A1S52B — Extension Base Unit (this item)
- A1S-55B / A1S-65B — Main Base Unit (CPU rack)
- A1SCPU / A2SCPU / A3SCPU — MELSEC-A Series CPU Module
- A1S61PN / A1S62PN — Power Supply Module
- A1SX40 / A1SX80 — Digital Input Modules
- A1SY10 / A1SY40P — Digital Output Modules
- A1S68AD / A1S62DA — Analog I/O Modules
- AC10B / AC30B — Extension Cable (1 m / 3 m)
Compliance & Industry Standards
- IEC 61131-2 — Programmable Controllers: Equipment Requirements & Tests
- JIS B 3502 — Japanese Industrial Standard for Programmable Controllers
- CE Marking — EMC Directive compliance for European market installations
- UL Listed — Applicable UL 508 industrial control equipment certification
- RoHS Compliant — Restriction of Hazardous Substances
Quality Assurance & Sourcing
Konmask.com specializes in industrial automation components for mission-critical applications. Every unit we supply undergoes the following process:
- Authenticity Verification: Parts are sourced from authorized distributors and verified OEM supply chains. Counterfeit screening is applied to all Mitsubishi Electric modules.
- Functional Inspection: Visual and mechanical inspection prior to dispatch — connector integrity, slot rail condition, and label verification.
- Secure Packaging: Anti-static ESD packaging with foam cushioning to prevent transit damage to sensitive backplane connectors.
- Traceability: Batch and serial number records maintained for warranty and MRO audit purposes.
How to Source This Part
- Add to Cart — Immediate checkout for in-stock units.
- Request a Quote — For bulk orders (5+ units), contact us for volume pricing and lead-time confirmation.
- Expedited Sourcing — If the A1S52B is not currently in stock, our procurement team can source from global authorized channels within 3–10 business days.
- Technical Pre-Sales Support — Unsure about compatibility with your existing MELSEC-A system? Email our engineers with your CPU model and current base unit configuration.
📧 support@konmask.com | 📞 +0086 19859288691
Application-Specific FAQ
Q: How many A1S52B units can be connected to a single MELSEC-A CPU?
A: The MELSEC-A Series supports up to 7 extension base units depending on the CPU model. Refer to your CPU’s hardware manual for the maximum I/O point count and extension stage limits.
Q: Is the A1S52B compatible with MELSEC-Q or iQ-R Series modules?
A: No. The A1S52B is exclusively compatible with MELSEC-A Series I/O and special function modules. It is not cross-compatible with Q-Series or iQ-R hardware.
Q: Can I use the A1S52B as the first extension stage directly from the main base?
A: Yes. Connect the A1S52B to the extension connector of the main base unit (e.g., A1S-55B) using the appropriate AC-series extension cable.
Q: What power supply module is required for the A1S52B?
A: The A1S52B requires a dedicated MELSEC-A Series power supply module (e.g., A1S61PN or A1S62PN) installed in its power supply slot.
Q: Do you provide a warranty on the A1S52B?
A: Yes. Konmask.com provides a 12-month warranty against manufacturing defects on all verified OEM units. Warranty terms are available on our website.
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Contact: support@konmask.com | +0086 19859288691
