Mitsubishi AY40 Digital Output Local Unit Module | Replacement, Equivalent & Selection Guide
The Mitsubishi AY40 is a digital output local unit module designed for the MELSEC-A series programmable logic controller (PLC) platform. As a trusted industrial automation component, the AY40 delivers reliable transistor output control for demanding manufacturing and process automation environments. Konmask.com supplies genuine and compatible AY40 modules with full technical support for system integrators and maintenance engineers worldwide.
Technical Specifications
- Model: AY40
- Manufacturer: Mitsubishi Electric
- Series: MELSEC-A
- Module Type: Digital Output Local Unit Module
- Output Type: Transistor (sink type)
- Number of Output Points: 32 points
- Rated Load Voltage: 12–24 VDC
- Max Load Current: 0.1 A per point
- Isolation Method: Photocoupler isolation
- Response Time: 1 ms or less (OFF→ON / ON→OFF)
- External Power Supply: 12–24 VDC
- Weight: Approx. 200 g
- Compatible Base Unit: MELSEC-A series base units
Compatible Replacement & Equivalent Models
When the AY40 is discontinued or unavailable, the following models may serve as functional replacements depending on your system configuration:
- AY40-UL – UL-certified variant of AY40, direct replacement in most applications
- AY41 – 32-point transistor output, source type; verify output polarity before substitution
- AY42 – 64-point transistor output module; check base slot compatibility
- QY40P (MELSEC-Q series) – Functional equivalent for system migration to Q-series platform
- QY41P (MELSEC-Q series) – Source-type 32-point output for Q-series migration
- Third-party equivalents: Consult Konmask technical team for validated cross-reference options from other brands
Note: Always verify I/O point count, output type (sink/source), voltage rating, and base unit compatibility before substituting modules.
Why Choose the Original AY40 Model
- Guaranteed compatibility with existing MELSEC-A series base units and CPU modules
- Proven reliability in high-cycle industrial environments with photocoupler isolation
- No firmware or parameter changes required — plug-and-play replacement
- Full Mitsubishi Electric quality standards and traceability
- Minimizes downtime risk compared to untested third-party alternatives
Typical Applications
- Solenoid valve and relay control in automated assembly lines
- Motor starter and contactor switching in conveyor systems
- Signal output for indicator lamps and HMI interfaces
- Batch process control in food, beverage, and chemical plants
- Machine tool and CNC auxiliary output control
- Building automation and HVAC control panels
System Compatibility
The AY40 is designed exclusively for the Mitsubishi MELSEC-A series platform. It is not directly compatible with MELSEC-Q, MELSEC-L, or MELSEC-iQ-R series base units without an adapter or system migration. Confirm your base unit model (e.g., A1S, A2S, A3N) before ordering.
- ✅ Compatible: A1S, A2S, A2SH, A3N, A3H, A2A, A3A series base units
- ❌ Not compatible: Q-series, L-series, iQ-R series (requires migration module or new hardware)
Selection Guide
Use the following criteria to confirm the AY40 is the right module for your application:
- Output type needed: Transistor sink output → AY40 ✅ | Source output → consider AY41
- Point count: 32 points required → AY40 ✅ | 64 points → consider AY42
- Load voltage: 12–24 VDC → AY40 ✅ | 100–240 VAC → consider relay output modules (AY80/AY81)
- Current per point: ≤0.1 A → AY40 ✅ | Higher current → use external relay or higher-rated module
- Platform: MELSEC-A series → AY40 ✅ | Migrating to Q-series → QY40P/QY41P
Quality Assurance & Sourcing
All AY40 modules supplied by Konmask.com are:
- Sourced from authorized distributors or verified surplus channels
- Inspected for physical integrity and label authenticity prior to shipment
- Packaged in anti-static protective materials
- Accompanied by a certificate of conformity upon request
- Backed by our 30-day return policy for defective units
How to Order
- Confirm your base unit model and available slot count
- Verify output type (sink/source) and load voltage requirements
- Add the AY40 to your cart or contact us for bulk/project pricing
- Provide your shipping address — we ship globally with DHL, FedEx, and UPS
- Receive your tracking number within 1–2 business days of order confirmation
For urgent requirements or large-quantity orders, contact our team directly for priority processing.
Replacement & Compatibility FAQ
Q: Is the AY40 still in production?
A: The MELSEC-A series has reached end-of-life. Konmask.com maintains stock of genuine and refurbished AY40 units. Contact us for current availability.
Q: Can I replace AY40 with a Q-series module?
A: Not directly. A full base unit migration is required to use Q-series modules. We can advise on migration paths.
Q: What is the difference between AY40 and AY40-UL?
A: The AY40-UL is the UL-listed version of the AY40 with identical electrical specifications. It is a direct drop-in replacement.
Q: Does the AY40 support high-speed output?
A: No. The AY40 is a standard-speed transistor output module (response time ≤1 ms). For high-speed pulse output, consider dedicated positioning modules.
Q: Can Konmask.com source AY40 modules not listed on the website?
A: Yes. Contact support@konmask.com with your requirements and we will provide a sourcing quote within 24 hours.
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