Mitsubishi A1SJ51T64

Product Name: I/O‑LINK Master Unit for MELSEC‑A Series PLC

Product Description: This is a special master communication module for Mitsubishi MELSEC‑A series PLC, responsible for I/O‑LINK field‑bus management, realizing data interaction between PLC host and remote I/O stations, completing distributed digital signal collection and output control of field equipment.

Category:
Description

Technical Specifications: Power supply DC 21.6‑27.6 V, typical current consumption 90 mA@24 V DC, maximum station count 16 stations per master unit, communication baud rate 38400 bps, total cable length 200 m, cable conductor cross‑section ≥0.75 mm², I/O allocation maximum 64 points, adjustable to 16/32/48 points.

Functional Features: Frame synchronization and bit‑synchronization combined transmission mode, parity check function, LED channel and communication status indication, fuse failure detection function, RUN A/RUN B external output signal, bus topology supports T‑branch connection without terminal resistor.

Application Scenarios: Manufacturing production‑line distributed control, packaging machinery, conveyor system control, automobile assembly workshop, legacy A‑series PLC system reconstruction, remote digital signal acquisition in workshop.

Performance Parameters: Operating temperature 0 ℃ ~ +55 ℃, relative humidity 5‑95 % non‑condensing, dimension 130 mm × 34.5 mm × 106.6 mm, weight 0.30 kg, backplane bus power supplied by PLC base rack.

Material Composition: Plastic housing of flame‑retardant modified ABS, internal multi‑layer printed circuit board, metal gold‑plated backplane bus connector.

Structural Features: 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 back‑plane bus connection.

Working Principle: Receive instruction data from PLC CPU through back‑plane bus, convert internal parallel data into serial I/O‑LINK bus signal and send to each remote I/O station; receive uploaded signal data from each remote station, convert into parallel data and transmit to PLC CPU for logical operation processing.

Installation Requirements: Insert into designated slot of MELSEC‑A base rack, lock module fixing buckle, use specified 0.75 mm² or above shielded cable for I/O‑LINK bus wiring, complete station address setting for each remote I/O station, confirm power supply within DC 21.6‑27.6 V range.

Usage Notes: Do not hot‑plug module under powered‑on state, strictly comply with maximum total bus length limit, shield layer of communication cable single‑end grounding, avoid strong electromagnetic field interference environment, perform station number verification before system startup.

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