Description

The A1SJ51T64 is a high-performance intelligent communication module from Mitsubishi Electric, specifically designed to provide Profibus-DP (Decentralized Peripherals) slave functionality for the MELSEC-A Series of programmable logic controllers (PLCs). This module acts as a critical gateway, seamlessly integrating Mitsubishi’s robust control platform into the widely adopted Profibus-DP industrial network. The primary role of the Mitsubishi A1SJ51T64 is to allow a MELSEC-A system, such as a remote I/O station or a dedicated machine controller, to communicate its I/O data to a master device, which is typically a higher-level PLC, DCS, or SCADA system from vendors like Siemens, ABB, or Honeywell. By functioning as a slave node, the A1SJ51T64 enables the MELSEC-A PLC to exchange up to 64 words of input and 64 words of output data with the Profibus master, ensuring synchronized and deterministic data exchange. This interoperability is essential for creating unified, multi-vendor automation architectures, maximizing the flexibility and leveraging the strengths of different control systems within a single plant.

A1SJ51T64 MITSUBISHI

Technical Specifications

Parameter Name	Parameter Value
Product Model	A1SJ51T64
Manufacturer	Mitsubishi Electric
Product Type	Profibus-DP Slave Communication Module
Network Protocol	Profibus-DP (DP-V0)
Data Exchange Capacity	64 words (128 bytes) IN / 64 words (128 bytes) OUT
Baud Rate	Selectable from 9.6 kbps up to 12 Mbps
Node Address Setting	Set via rotary switches on the front of the module
Isolation	Photocoupler isolation between the Profibus network and the PLC
Internal Current Consumption	5V DC, 0.55A (supplied from the base unit backplane)
Status Indicators	RUN, ERR., MST, SD, RD LEDs for diagnostics
Connector	9-pin D-Sub female (standard Profibus connector)
Operating Temperature	0°C to 55°C

Main Features and Advantages

The Mitsubishi A1SJ51T64 module’s foremost advantage is its ability to break down communication barriers between automation platforms. It provides a standardized, certified Profibus-DP slave interface, ensuring reliable and seamless connectivity with any Profibus-DP master, thereby future-proofing investments in MELSEC-A systems and simplifying integration into larger, heterogeneous plant networks. The module supports high-speed data exchange at rates up to 12 Mbps, which is critical for applications requiring fast and deterministic updating of I/O data between the slave station and the master controller. The generous 64-word input and output data capacity allows for the transfer of a significant amount of process and status information, making it suitable for controlling complex remote I/O stations or even entire machine modules.

Configuration is streamlined for ease of use. The node address, a fundamental Profibus parameter, is set manually via intuitive rotary switches on the module’s front face, eliminating the need for complex software setup for this basic parameter. Comprehensive diagnostic capabilities are provided through a clear set of LED indicators, allowing for rapid troubleshooting of network status, communication errors, and module health. The A1SJ51T64 is designed for industrial ruggedness, with photocoupler isolation that protects the PLC’s internal electronics from electrical noise and surges on the Profibus network, ensuring unwavering communication integrity in electromagnetically challenging environments.

Application Field

The A1SJ51T64 is deployed in industrial environments where a Mitsubishi MELSEC-A system needs to be integrated as a subordinate device within a larger automation hierarchy controlled by a Profibus-DP master. A common application is in automotive manufacturing plants, where a central Siemens PLC (as the master) might oversee an entire production line, while individual welding, gluing, or assembly stations powered by Mitsubishi A-Series PLCs (as slaves using the A1SJ51T64) report their status and receive commands. In large packaging and material handling systems, it allows a Mitsubishi-controlled palletizer or conveyor section to be seamlessly integrated into a plant-wide Profibus network managed by a different vendor’s system.

It is also used in process automation, such as in water treatment facilities, where a main DCS might use Profibus to communicate with distributed skid-mounted systems that utilize MELSEC-A for local control. Essentially, the Mitsubishi A1SJ51T64 is the key solution for any project requiring a reliable, high-performance Mitsubishi PLC to act as a compliant and data-rich slave device on a standard Profibus-DP network, enabling efficient and flexible multi-vendor system design.

A1SJ51T64 MITSUBISHI

Related Products

A1SJ51T61: A similar Profibus-DP module with a smaller data exchange capacity (32 words IN/OUT).

A1SJ71PB92: A Profibus-FMS module for a different layer of the Profibus protocol suite.

A1SJ71QE71: A MELSECNET/H module for Mitsubishi’s proprietary high-speed network.

A1SCPU: A typical MELSEC-A Series CPU module (e.g., A1SCPU, A1SJCPU) that the A1SJ51T64 module serves.

A1S35B / A1S38B: 5-slot and 8-slot main base units to house the CPU and communication modules.

Profibus Connector and Cable: Standard Profibus network components required to connect the module to the network trunk.

GX Configurator-DP: The Mitsubishi software package used for detailed setup and configuration of the module’s data mapping.