PLC Mitsubishi


The controllers of the FX1S series deliver outstanding functionality with up to 30 inputs and outputs in a very compact package. The FX1S is ideal for applications in difficult-to-access installations and systems where normal servicing is not possible. The integrated real-time clock and maintenance-free EEPROM with capacity for up to 2,000 program steps make the FX1S an autonomous and very service-friendly system.

FX1S series highlights:

• 10 to 30 inputs and outputs
• High processing speed (0.55µs per log. instruction)
• Ample program storage space and large device ranges
• Integrated positioning controller
• Serial communications options (RS-232, RD-422, RS-485)
• Analog signal processing with optional expansion adapters
• Integrated real-time clock
• User-friendly programming with MS Windows-based programming software package or hand-held programming unit
• Expandable with adapters or display modules



The FX2N PLC has been an industry standard of micro PLC since its launch. FX2N has six shipping approvals and has been used in applications from controlling temperature in containers to managing diesel engines.

The FX2N series base units are are available with 16, 32, 48, 64, 80 or 128 input/output points.

It is possible to choose between relay and transistor output type. Triac output types for 110 V AC for sink/source are also available.

Over 30 types of special function and additional I/O modules are available to customise FX2N to your automation tasks.

Advanced analogue design mean that in many cases the same block can be used for voltage current operation and, in the case of the FX2N-8AD, additional temperature operations as well.

I/O range – 16-256

Program memory – 16k steps (with memory cassette)

Instruction Times

Basic instructions: 0.07 µs / logical instruction


2 high speed counters  (60 kHz)
4 high speed counters (10 kHz)
2 pulse train outputs (20 kHz)

High speed counter block (50 Khz)
Pulse train output block (1 MHz)

Mitsubishi Q Series PLC

Leading Performance , scaleable to thousands of I/O. The Q Series is the ultimate fit for purpose automation platform for all of your key projects.

  • Spans a range of Mitsubishi CPU types from small/medium systems, to complex networked systems handling tens of thousands of I/O, addressing the needs of all applications.
  • Embraces contemporary technologies such as high speed Ethernet, open systems and Internet capabilities, to reduce lifecycle costs via remote system management & maintenance.
  • Increases productivity throughout a system life cycle of design, implementation and maintenance by offering a range of capabilities that allow more to be achieved in less time.
  • Multiple CPU capability adds open ended system performance and flexibility.
  • Multiple program capability allows concurrent development, code reuse, better program organization and faster troubleshooting for less downtime.
  • Multiple access to the system allows many technicians to work simultaneously for faster system debugging and maintenance.
  • High productivity GX Developer programming tools permit designers to concentrate on the automation of their system, not the configuration of the controller.
  • Networking & communication options distribute Q Series systems over wide areas while reducing wiring costs.
  • Sequence CPUs can also address process applications by means of built-in PID capabilities.
  • Extremely compact package saves panel costs.
  • Certified bu UL, cUL, CE as indicated and DNV, ABS, RINA, LR & NK shipping approvals for all Q Series.

QS Safety CPU Series features include:

  • Fully certified by TUV to IEC 61508 SIL 3 and EN 954 Category 4
  • Scalable to any need; capable of overseeing the safety needs of an entire production line or a single machine
  • Leverages the existing programming & maintenance tools of the GX Developer engineering suite
  • No special programming techniques to master; learning curve is short
  • Extensive diagnostic and security features
  • Uses the open CC-Link Safety device level network to connect remote I/O for safety critical devices

A Series Transition Centre

Mitsubishi Electric is planning a transition from the MELSEC A-Series PLC product families (10" rack height) to the Q Series Automation Platform. This is planned to be completed by September 2006. IMPORTANT: The compact MELSEC AnSH and QnAS(H) PLC Series are not affected by this announcement.  Their full availability will continue for

[Note: Throughout the ASTC andassociated materials, "A Series" is used to mean all An, AnN, AnA,AnU, QnA CPUs and allassociated racks, power supplies,I/O, special function and network modules, and related peripherals.]

The full-size (10" rack height) A Series was introduced in 1985. It has provided 20 years of service and will continue to serve reliably for many  customers. However, the transition to the Q Series is being driven by environmental (RoHS Directive) and supply (obsolescence of parts) reasons as follows:



Mitsubishi Electric is committed globally to conductingits businesses in an environmentally responsible manner. Along with this, the European Union has enacted the Restriction of Hazardous Substances Directive ("RoHS"). This will take effect in July 2006, and has had global influence for all electrical and electronic equipment manufacturers. RoHS places strict limitations on the levels of toxic materials such as lead, cadmium and other substances that can be used in electronic devices.

Since many A Series products were introduced years before the RoHS Directive was even considered, it would require an extensive re-design of much of the product line to make it RoHS compliant. Since the A Series has been surpassed by the AnSH and Q Series lines, it does not make economic sense to embark on a development project of this nature at this point in the product lifecycle. Committing this level of resources to such a project would limit continuing product development on our current lines such as the Q Series, and hence potentially limit future development of current systems.

Parts supply

Many A Series products were designed with components that have long ceased to be available. Mitsubishi has continually mitigated this through periodic redesigns of specific products to accommodate newer parts. We have also stockpiled key components to extend the lifetime of the most popular A Series products. However, these measures cannot guarantee an indefinite lifespan, and we are now beginning to experience increasingly severe difficulties with component supply. Hence many products now face a short life expectancy.

Users of the A & QnA Series should begin to plan for this transition.  Mitsubishi will offer various options including continued short term A/QnA-Series use, integration of newer products to existing installations, and comprehensive conversion to newer products.





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