Industrial Automation Output Solution – MITSUBISHI A1SY42 | MELSEC-A Series
Where This Product Is Used
The MITSUBISHI A1SY42 Digital Output Module is engineered for demanding industrial environments where reliable discrete control is critical. Typical deployment scenarios include:
- Automotive Manufacturing Lines – Controls solenoid valves, relay coils, and actuators on body-welding and paint-shop conveyors.
- Food & Beverage Packaging – Drives pneumatic cylinders and indicator lamps on high-speed filling and sealing machines.
- Semiconductor Fab Equipment – Interfaces with cleanroom-rated actuators requiring low-leakage transistor outputs.
- Water Treatment & Utilities – Switches pump starters and valve positioners in SCADA-integrated control panels.
- Material Handling & Conveyors – Manages diverter gates, sorter actuators, and status beacons in distribution centers.
- Machine Tool & CNC Systems – Provides auxiliary I/O for spindle brakes, coolant valves, and tool-change sequences.
Technical Specifications
| Part Number / SKU | A1SY42 |
| Manufacturer | MITSUBISHI Electric |
| Series | MELSEC-A (AnS Series) |
| Module Type | Digital (Transistor) Output Module |
| Number of Output Points | 16 points |
| Output Type | Transistor (Sink / NPN) |
| Rated Load Voltage | 12–24 VDC |
| Max Load Current per Point | 0.1 A |
| Max Load Current (All Points ON) | 1.6 A |
| Isolation Method | Photocoupler |
| Response Time (OFF→ON) | ≤ 1 ms |
| Response Time (ON→OFF) | ≤ 1 ms |
| External Power Supply | 12–24 VDC (supplied externally) |
| Connector Type | 40-pin connector |
| Operating Temperature | 0 °C to 55 °C |
| Storage Temperature | -25 °C to 75 °C |
| Relative Humidity | 5–95% RH (non-condensing) |
| Weight | Approx. 260 g |
| Compatible Base Units | A1S33B, A1S35B, A1S38B, A1S52B, A1S55B, A1S58B |
Why Engineers Specify This Model
- Proven MELSEC-A Platform – Decades of field-proven reliability in harsh industrial environments; extensive installed base simplifies spare-parts management.
- Photocoupler Isolation – Galvanic isolation between PLC logic and field wiring protects the CPU from voltage spikes and ground loops.
- Fast Transistor Switching – Sub-millisecond response enables precise timing control for high-speed actuators and pulse-output applications.
- Compact AnS Form Factor – Slim module profile maximizes I/O density in space-constrained control panels.
- Wide Voltage Compatibility – 12–24 VDC load range accommodates both legacy 12 V field devices and modern 24 V actuators without rewiring.
- Direct CPU Integration – Plug-and-play compatibility with all AnS-series base units; no additional interface modules required.
Complete System Bill of Materials
A fully operational MELSEC-A control system using the A1SY42 typically includes:
- CPU Module – A1SCPU, A1SHCPU, or A1SJHCPU
- Power Supply Module – A1S61P or A1S62P (24 VDC input)
- Base Unit – A1S33B / A1S35B / A1S38B (3/5/8-slot)
- Digital Input Module – A1SX42 (16-point DC input, companion module)
- Output Module (this unit) – A1SY42
- I/O Wiring Connector – A6CON1 or A6CON2 (40-pin crimp/solder connector)
- Programming Cable – SC-09 RS-232 or USB-SC09-FX adapter
- Programming Software – GX Developer or GX Works2
Compliance & Industry Standards
- CE Marking – EMC Directive 2014/30/EU & Low Voltage Directive 2014/35/EU
- UL Listed – UL 508 (Industrial Control Equipment)
- RoHS Compliant – Restriction of Hazardous Substances Directive
- IEC 61131-2 – Programmable Controllers: Equipment Requirements and Tests
- SEMI S2 compatible field device interface (semiconductor applications)
Quality Assurance & Sourcing
Every MITSUBISHI A1SY42 unit shipped from Konmask.com undergoes the following verification process:
- Visual inspection for physical damage, label authenticity, and connector integrity
- Functional power-on test confirming LED status indicators and output channel continuity
- Anti-static packaging with humidity indicator card for safe long-distance transit
- Traceability documentation available upon request (batch records, test reports)
We source exclusively from authorized distributors and verified industrial surplus channels. Counterfeit-free guarantee backed by our quality assurance policy.
How to Source This Part
- Add to Cart – Click “Add to Cart” above and proceed to checkout.
- Request a Quote – For bulk orders (5+ units) or project BOM pricing, email [email protected] with your quantity and delivery timeline.
- Lead Time – In-stock units ship within 1–2 business days. Out-of-stock units: typical lead time 7–15 business days depending on sourcing region.
- Global Shipping – We ship worldwide via DHL Express, FedEx International, and EMS. Export documentation (commercial invoice, packing list, CO) provided.
- Payment – Accepts T/T bank transfer, PayPal, credit card, and Alibaba Trade Assurance.
Application-Specific FAQ
Q: Is the A1SY42 compatible with the A2S or Q-series base units?
A: No. The A1SY42 is designed exclusively for AnS-series slim base units (A1S33B, A1S35B, A1S38B, A1S52B, A1S55B, A1S58B). It is not compatible with A2S-series or MELSEC-Q/L/iQ-R base units.
Q: Can the A1SY42 drive 24 VDC relay coils directly?
A: Yes, provided the relay coil current does not exceed 0.1 A per output point and 1.6 A total. For higher-current loads, use an interposing relay or solid-state relay.
Q: What is the difference between A1SY42 and A1SY41?
A: The A1SY41 uses a 32-point output configuration with a different connector pitch, while the A1SY42 provides 16 points with a 40-pin connector. The A1SY42 offers higher per-point current capacity (0.1 A vs 0.05 A on A1SY41).
Q: Is a separate external power supply required?
A: Yes. The A1SY42 requires an external 12–24 VDC power supply for the output load circuit. The PLC base unit power supply does not power the field-side outputs.
Q: Can I use GX Works3 to program a system with the A1SY42?
A: No. The MELSEC-A series is supported by GX Developer and GX Works2 only. GX Works3 is for iQ-R and iQ-F series CPUs.
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