Mitsubishi FX3S PLC — Most Compact Entry-Level FX3

Mitsubishi FX3S PLCs offer the smallest physical footprint in the FX3 family while retaining essential features including USB programming, RS422 communication, and high-speed pulse I/O. Available as FX3S-10MR, FX3S-14MR, and FX3S-30MR base units, the FX3S delivers Mitsubishi quality for space-constrained machine control. Flextech Industrial supplies the complete FX3S range with local support throughout Malaysia.

Key Features and Performance

Mitsubishi FX3S PLCs achieve 0.21 microsecond basic instruction execution with 16,000 steps of program memory in a body that is the most compact in the current Mitsubishi compact PLC lineup. The FX3S-10MR measures just 90mm wide, fitting into small machine control cabinets where panel space is at a premium.

Every Mitsubishi FX3S base unit includes built-in RS422 and USB ports for programming and communication. The USB mini-B port connects directly to any laptop running GX Works2 software, eliminating the need for a dedicated programming cable. An optional communication adapter on the left side adds RS232 or RS485 for connecting to HMI panels or supervisory systems.

The FX3S supports two axes of high-speed pulse output at 100 kHz for stepper motor and servo positioning applications. High-speed counter inputs handle up to 100 kHz single-phase signals, enabling encoder feedback and speed measurement. Both sink and source input wiring configurations are supported across all FX3S models.

Real-time clock functionality is built into the Mitsubishi FX3S, supporting time-based scheduling, shift logging, and maintenance interval tracking without an external clock module. Battery-backed memory retains programs and data during power loss, with a battery life exceeding five years under normal operating conditions.

The FX3S-30MR model provides 30 I/O points in the base unit — the maximum for the series. Unlike the FX3G and FX3U, the FX3S does not support right-side I/O expansion, making it a fixed-configuration controller best suited for applications where the I/O count is known and stable.

Technical Specifications

Applications in Malaysian Industry

Mitsubishi FX3S PLCs serve single-machine automation applications across Malaysia’s manufacturing and services sectors. Standalone packaging machines in food processing use the FX3S-14MR for conveyor sequencing and reject gate control with minimal I/O requirements.

Small injection moulding auxiliaries including material loaders and dryers deploy the FX3S for temperature and timer-based cycle control. Car wash systems and vending machines across Malaysia use the FX3S for sequential logic with real-time clock scheduling. Under NIMP 2030, the FX3S enables Malaysian small enterprises to implement basic automation at the lowest Mitsubishi entry point, building a foundation for future expansion to FX3G or FX3U platforms.

Mitsubishi FX3S vs Alternatives

Mitsubishi FX3S PLCs are the entry point of the FX3 series, positioned below the FX3G and FX3U. Compared to the FX3G, the FX3S trades expandability (no right-side expansion) and program capacity (16K vs 32K) for a smaller footprint and lower cost. Against Siemens S7-1200 1211C, the FX3S offers comparable I/O density with faster basic instruction execution. Compared to Omron CP1E-N14, the FX3S provides USB programming as standard and higher pulse output frequency. The FX3S is the optimal choice for fixed I/O applications up to 30 points.

Why Source from Flextech Industrial

Flextech Industrial stocks all Mitsubishi FX3S models in Malaysia for same-week delivery. Our automation team provides application sizing to confirm the FX3S meets your I/O requirements or recommends the FX3G if expansion potential is needed. We include GX Works2 programming assistance for first-time Mitsubishi users.

[Request Pricing](/contact/) for Mitsubishi FX3S PLCs — contact our team for volume pricing on multi-unit orders.

Frequently Asked Questions

What is the maximum I/O count on the Mitsubishi FX3S?

Mitsubishi FX3S PLCs support a maximum of 30 I/O points on the FX3S-30MR/MT base unit. The FX3S does not support right-side expansion modules. If your application requires more than 30 I/O points, the FX3G (expandable to 128 I/O) or FX3U (expandable to 256 I/O) is recommended.

Can the FX3S connect to an HMI touchscreen?

Mitsubishi FX3S PLCs connect to HMI panels through the built-in RS422 port or an optional RS232/RS485 communication adapter. The FX3S is compatible with Mitsubishi GOT series HMIs, Weintek, Xinje, and other third-party panels that support Mitsubishi FX protocol.

What is the difference between FX3S-10MR and FX3S-10MT?

Mitsubishi FX3S-10MR uses relay outputs suitable for AC and DC loads up to 2A per point, with switching speeds limited to mechanical relay response. The FX3S-10MT uses transistor outputs for fast switching and pulse output capability, required for stepper motor and servo control applications.

Is the FX3S suitable for a first automation project in Malaysia?

Mitsubishi FX3S PLCs are an excellent starting platform for Malaysian businesses entering automation. The built-in USB port simplifies programming setup, GX Works2 provides simulation before deployment, and the Mitsubishi FX instruction set has extensive documentation and community support. Flextech Industrial offers starter bundles combining the FX3S with a programming cable and software license.

Does the FX3S support analog inputs and outputs?

Mitsubishi FX3S PLCs support analog I/O through the left-side communication adapter port using the FX3S-1DA-BD (1-channel analog output) board. For analog input, the FX3U-4AD-ADP adapter connects through the expansion adapter. Analog capability is limited compared to the FX3G and FX3U series.