The FX3G-60MR/ES-A is a 60-point relay output CPU unit from Mitsubishi Electric, belonging to the MELSEC FX3G series — a compact, cost-optimised PLC platform designed for small-to-medium machine control applications requiring built-in Ethernet and relay output switching capability. The FX3G-60MR/ES-A is available through Atlantech Drives — quote within 24–48 hours, worldwide express shipping, 12-month warranty.
What Is the Mitsubishi FX3G-60MR/ES-A?
The FX3G-60MR/ES-A is the 60-point model of the FX3G CPU range, providing 36 DC sink/source inputs and 24 relay contact outputs within the CPU housing. The suffix breakdown is: 60 = total I/O points, M = main unit, R = relay output, ES = CE-marked international version, A = AC power supply (100–240 V AC). The FX3G series sits between the entry-level FX3S and the higher-performance FX3U in the Mitsubishi compact PLC hierarchy, sharing the FX3U programming environment (GX Works2) and supporting FX3U-series communication boards (232-BD, 485-BD, USB-BD) for serial communication expansion. Built-in Ethernet is standard on the FX3G, distinguishing it from the FX3U which requires an optional Ethernet adapter.
Key Technical Specifications
- Total built-in I/O: 60 (36 inputs + 24 outputs)
- Input type: DC sink/source, 24 V DC
- Output type: Relay contact (volt-free)
- Output voltage range: 5–240 V AC / 5–30 V DC
- Output current per point: 2 A (resistive load)
- Program memory: 32,000 steps
- Basic instruction execution: 210 ns
- Built-in Ethernet: 10/100BASE-TX, 1 port (MC Protocol, MELSOFT)
- Built-in RS-422: 1 port (programming)
- USB port: Mini-B (direct PC programming)
- High-speed counter: 60 kHz, 6 channels
- Power supply: 100–240 V AC, 50/60 Hz
- Certifications: CE, UL
- Operating temperature: 0 to 55°C
- Dimensions (W × H × D): 220 × 90 × 86 mm
Series Comparison & Selection Guide
The FX3G-60MR/ES-A occupies a well-defined position within the Mitsubishi compact PLC range. Key selection distinctions:
- FX3G-60MR/ES-A vs FX3G-40MR/ES-A: The 40-point model provides 24 inputs and 16 relay outputs. Choose the 60-point model when 24+ relay output points are needed within the CPU unit without extension modules.
- FX3G-60MR/ES-A vs FX3U-64MR/ES-A: The FX3U offers faster instruction execution (65 ns vs 210 ns), supports up to 384 total I/O points with extensions (vs 256 for FX3G), and accepts a wider range of special function modules. Choose FX3G for cost-sensitive applications within its I/O and speed envelope; choose FX3U when high-speed processing or large I/O expansion is required.
- FX3G-60MR/ES-A vs FX5U-32MT/ES: The FX5U is the current-generation replacement platform with 34 ns execution, 200 kHz pulse output, and SD card data logging. For new machine designs, FX5U is the recommended platform; FX3G remains valid for spare parts and like-for-like replacements on existing installations.
Installation Advice
The FX3G-60MR/ES-A’s AC power supply accepts 100–240 V AC without range switching — connect L and N (or L1 and L2 for 200 V AC systems) to the power supply terminals and verify polarity of the 24 V DC sensor supply output before connecting field devices. The relay outputs are grouped with shared COM terminals — consult the wiring diagram in the FX3G Hardware Manual to identify which COM serves which output group before energising loads, as incorrect COM wiring is the most common installation error on relay output CPUs. For inductive AC loads, install RC snubbers across each load coil to suppress contact arc and protect relay contacts. The built-in Ethernet port requires a fixed IP address assignment in GX Works2 parameters (Module Parameter → Built-in Ethernet) before the port becomes active — the factory default IP address is 192.168.3.250, which should be changed to match the site network addressing scheme before commissioning.
Frequently Asked Questions
Q: Can the FX3G-60MR/ES-A be programmed with GX Works3?
A: No. The FX3G series requires GX Works2. GX Works3 supports FX5U and MELSEC iQ-R/iQ-F series only. Existing FX3G programs in GX Works2 format can be imported into GX Works3 for migration reference, but ongoing FX3G programming and maintenance must be performed in GX Works2.
Q: Does the FX3G-60MR/ES-A support high-speed pulse output for servo or stepper drives?
A: No. Relay output models cannot generate high-speed pulse trains — relay contact switching time (~10 ms) is incompatible with pulse output requirements. For servo or stepper pulse control, specify the transistor output variant FX3G-60MT/ES-A, which supports up to 100 kHz pulse output on Y0 and Y1.
Q: How many extension modules can be connected to the FX3G-60MR/ES-A?
A: Up to 4 FX3G or FX3U extension blocks can be connected, adding a maximum of 128 additional I/O points. Combined with the 60 built-in points, the maximum FX3G system I/O is 188 points — significantly less than the FX3U’s 384-point maximum, which should be considered during system architecture planning.
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