What PLC series is this module compatible with?
It is intended for the Mitsubishi MELSEC-A series racks as a local I/O unit.
1 actual photo shown first. Reference images are model-matched and must be confirmed before purchase.
Mitsubishi
A1SY81
Digital Output Module, 32 points, 12/24 VDC, Source
Mitsubishi
From $285.93In stockDiscontinued
Product Description
The A1SY81 is a digital output local unit module for Mitsubishi MELSEC-A PLC systems, designed to provide reliable sourcing transistor outputs for field devices. It offers 32 channels of 12/24 VDC outputs with source configuration, suitable for driving indicators, solenoids, and other low-current loads in industrial automation. The module integrates into MELSEC-A racks to expand output capacity while maintaining deterministic operation within the PLC backplane. Typical per-point current is 0.1 A, supporting stable switching for DC loads with appropriate external protection. This unit is discontinued by the manufacturer but remains common in legacy installations where maintaining system compatibility is critical. Use within the specified voltage range and observe output current limits per point and per common to prevent thermal stress. The module is ideal for replacement or expansion in existing MELSEC-A architectures requiring 32 sourcing outputs. Includes the module only; cabling and terminal blocks are application-dependent.
Key Features
- •32 sourcing transistor DC outputs, 12/24 VDC operation, Local I/O unit for MELSEC A, Legacy replacement for discontinued part, Compact 32 point density, Suited for low current DC loads
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: $592.58
Availability: 46 in stock
Lead time: Quoted after RFQ
Never Used
Price: $490.01
Availability: 2 in stock
Lead time: Quoted after RFQ
Used
Price: $285.93
Availability: 153 in stock
Lead time: Quoted after RFQ
FNFP
Price: RFQ
Availability: 6 in stock
Lead time: Quoted after RFQ
Specifications
- Product type
- Digital output I/O module
- Outputs
- 32 digital outputs, sourcing
- Output voltage
- 12/24 VDC
- Per point current
- 0.1 A
- Series
- MELSEC-A
- Main function
- I/O unit, digital output local module
- Manufacturer product status
- Discontinued
- Manufacturer part number
- A1SY81
- Brand
- MITSUBISHI
- Part #
- A1SY81
- Category
- PLCs/Machine Control
- Subcategory
- PLC Module/Rack
- Weight
- 0.22 lbs
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
DHL, FedEx, UPS, or forwarder options can be quoted with packing photos and tracking details.
Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
Independent sourcing disclaimer
We are not an authorized distributor, reseller, or representative of Siemens, Mitsubishi, Omron, or other manufacturers listed on this site. All product names, trademarks, brands, and logos are the property of their respective owners. Products may be used, refurbished, surplus, or sourced from the secondary market unless otherwise stated.
Need A1SY81 availability?
Prices and stock can change. Submit quantity, required condition, and destination for a current quote.
FAQ
Are the outputs sourcing or sinking?
The 32 outputs are sourcing transistor type.
What is the output voltage range?
12/24 VDC nominal for the digital outputs.
What is the current rating per output point?
0.1 A per point as commonly specified for this model.
Is this product still in production?
No, the manufacturer lists it as discontinued; availability is via distribution or surplus.