Mitsubishi FX1N-24MT-001 PLC – Obsolete MELSEC FX1N Spare Part

Technical Dossier

Product Details And Specifications

Mitsubishi FX1N-24MT-001 PLC – Obsolete MELSEC FX1N Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Solving the Discontinued Hardware Crisis

The FX1N-24MT-001 was deployed extensively in packaging machinery, conveyor control, injection molding auxiliaries, and small-scale process automation throughout Asia, Europe, and the Americas. Its RS-422 port and native compatibility with the FX expansion bus made it the default choice for system integrators building cost-efficient cells during that era.

Mitsubishi's end-of-life announcement for the FX1N series left a large installed base without a direct hardware replacement. The successor FX3U and current iQ-F series are not drop-in compatible — they require updated wiring, revised ladder logic, and in many cases a new HMI configuration. For a plant running 20 or 30 such cells, that migration is a multi-year capital project, not a maintenance task.

Condition & Reliability Assurance

• Step 1 – Visual & Mechanical Inspection: Housing integrity, terminal block condition, and label verification against Mitsubishi factory markings.
• Step 2 – Electrolytic Capacitor Assessment: Capacitor aging is the primary failure mode in PLCs stored beyond 10 years. Each unit is evaluated for capacitor bulge, leakage, and ESR deviation.
• Step 3 – Firmware Version Verification: The unit's firmware revision is confirmed and documented. Mismatched firmware versions can cause silent compatibility issues with existing FX-series expansion modules.
• Step 4 – Terminal & Pin Corrosion Check: All I/O terminals and the RS-422 port are inspected under magnification for oxidation and contact resistance degradation.
• Step 5 – Functional Power-On Test: The unit is powered and cycled through a standard diagnostic routine to confirm CPU operation, I/O response, and communication port integrity before dispatch review.

Key Features for System Maintenance

• Drop-in replacement: The FX1N-24MT-001 is a direct hardware substitute for any failed unit of the same part number. No wiring changes, no I/O remapping, no ladder logic rewrite required.
• No re-engineering cost: Existing GX Developer or GX Works2 programs upload directly to the replacement unit. Commissioning time is measured in minutes, not days.
• Expansion bus compatibility preserved: All FX1N-series extension modules (FX1N-8EX, FX1N-8EYT, FX2N-series analog modules, etc.) remain fully operational without reconfiguration.
• HMI continuity: Existing GOT900 and GOT1000 series HMI panels continue to communicate without screen or recipe modification.
• Deferred capital expenditure: Each verified spare unit purchased today directly offsets the risk of an unbudgeted system migration triggered by hardware failure.

How do I confirm the unit is genuine and not counterfeit?
Every unit ships with a QA inspection report documenting the serial number, firmware version, condition grade, and test results. Mitsubishi factory label markings are verified during Step 1 of our inspection process. We do not sell units where authenticity cannot be confirmed.

Should I buy more than one unit?
For any facility operating more than three FX1N-based cells, holding a minimum of two spare units is the standard recommendation among industrial maintenance professionals. The FX1N-24MT-001 is no longer manufactured. Availability in the secondary market will continue to tighten. Procurement cost today is materially lower than procurement cost in 18 months.