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MITSUBISHI A1SJ51T64
Product Name: MELSEC-I/O Link Remote I/O Master Module
Product Introduction: The Mitsubishi A1SJ51T64 is a remote I/O system master module for the MELSEC-A series PLC. It serves as the central master in a MELSEC-I/O Link configuration, connecting and managing distributed remote I/O stations for data acquisition and control signal transmission.
Detailed content
Technical Specifications:
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Parameter
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Value
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Brand
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MITSUBISHI (Mitsubishi Electric)
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Model
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A1SJ51T64
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Product Type
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I/O Link Master Module
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Series
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MELSEC-A
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Max Remote Stations
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16 stations per master
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Max I/O Points
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128 points (64 input + 64 output)
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Communication Protocol
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I/O Link (MELSECNET/10 compatible)
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Communication Speed
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38.4 kbps
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Bus Form
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T-branch possible, no terminal resistance required
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Max Cable Length
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200 meters
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Operating Voltage
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DC 21.6–27.6 V (typical 24 VDC)
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Typical Current
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Approx. 90 mA at 24 VDC
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I/O Refresh Time
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Approx. 5.4 ms
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Dimensions (H×W×D)
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130 × 34.5 × 106.6 mm
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Weight
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0.3 kg
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Operating Temperature
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0°C to +55°C
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Certifications
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UL, CSA, CE
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Functional Features:
- High-speed data transmission with fixed refresh time regardless of point count
- Flexible I/O split configuration (16/32/48 points)
- Bus-type topology supporting T-branch wiring without terminal resistors
- LED status indicators for monitoring RUN A, RUN B, and error conditions
- Built-in diagnostics for remote I/O device monitoring
Structural Characteristics:
- Single-slot rack-mount structure for A-series base unit
- Front-side terminal wiring area
- LED indicator layout on front panel
- Rear edge connector for backplane bus connection
Working Principle:
The module receives instruction data from the PLC CPU through the backplane bus, converts parallel data into serial I/O Link bus signals, and transmits them to remote I/O stations. It receives uploaded signal data from each remote station, converts it back to parallel data, and transmits it to the PLC CPU for logical operation processing.
Installation Requirements:
- Insert into designated slot of MELSEC-A base rack
- Lock module fixing buckle
- Use shielded cable of 0.75 mm² or above for I/O Link bus wiring
- Complete station address setting for each remote I/O station
Usage Notes:
- Do not hot-plug module while powered on
- Comply with maximum total bus length limit
- Ground shield layer of communication cable at single end only
- Avoid strong electromagnetic field interference environments
- Perform station number verification before system startup
