MITSUBISHI PLC FX3U-48MR/ES-A FX3U48MRESA NEW

Mitsubishi FX3U-48MR/ES-A PLC Main Unit | 48 I/O Relay Output Compact Controller

Product Overview

The Mitsubishi FX3U-48MR/ES-A is a compact yet highly capable PLC main unit designed for industrial automation systems that require dependable control, flexible expansion, and stable relay output performance. As part of the proven MELSEC-F FX3U series, this controller is well suited for machinery control, packaging equipment, conveyors, assembly systems, and a wide range of factory automation applications where reliability and practical integration matter.

Built for users who need a strong balance of processing speed, onboard I/O, and system expandability, this model combines 24 digital inputs and 24 relay outputs in a compact housing while supporting broader system growth through extension modules and remote I/O configurations. It is a solid choice for both new installations and replacement projects in existing Mitsubishi automation environments.

Technical Data

Performance and Application

The FX3U-48MR/ES-A is designed for users who need more than basic switching logic. With 64K steps of program memory, fast instruction execution, and scalable I/O architecture, it fits applications that demand responsive control and room for system expansion. In practical terms, that means it can support not only straightforward machine sequencing but also more advanced automation tasks involving timers, counters, communication, and distributed control layouts.

Its relay output design makes it especially useful in applications where mixed load types are involved or where users prefer the versatility of relay switching in machine control circuits. At the same time, the built-in 24 V DC sink/source inputs provide flexibility for common sensor wiring arrangements used in industrial panels.

This model is commonly used in:

• Packaging machinery

• Material handling systems

• Conveyor and sorting equipment

• Assembly and inspection stations

• General-purpose factory automation control panels

• Retrofit and replacement projects for Mitsubishi PLC systems

Its compact footprint also helps when cabinet space is limited, while the FX3U platform’s expandability makes it easier to scale a machine without changing the core control architecture too early in the design process.

Key Features

• Compact Mitsubishi FX3U PLC main unit for industrial automation

• 48 total I/O points with 24 digital inputs and 24 relay outputs

• 100–240 V AC power supply for flexible installation environments

• 24 V DC sink/source inputs for broad sensor compatibility

• 64K steps program memory for complex control logic

• Expandable architecture supporting up to 384 I/O points with local and remote configuration

• Fast processing with 0.065 μs basic instruction speed

• Built-in RS-422 communication and optional USB connectivity

• Suitable for control cabinet integration, replacement, and machine upgrades

Why Choose the FX3U-48MR/ES-A

For many buyers, the value of this PLC lies in its balance. It offers more capability than entry-level compact controllers, yet remains straightforward enough for everyday industrial use. The onboard I/O count is practical, the relay outputs are versatile, and the platform is expandable enough to support future machine changes without forcing a complete redesign.

This makes the FX3U-48MR/ES-A a strong option for machine builders, maintenance teams, and parts buyers who need a controller that can handle real production demands while staying familiar, serviceable, and easy to integrate into existing Mitsubishi-based systems.

FAQ

Q1: What kind of PLC is the Mitsubishi FX3U-48MR/ES-A?

A: The FX3U-48MR/ES-A is a compact PLC main unit from Mitsubishi Electric’s MELSEC-F FX3U series. It is designed for industrial automation applications and combines 24 digital inputs with 24 relay outputs, giving it a total of 48 onboard I/O points. This makes it suitable for a wide range of machine control and factory automation tasks where reliable signal handling and flexible load switching are required.

Q2: What power supply does the FX3U-48MR/ES-A use?

A: This PLC uses an AC power supply rated at 100–240 V AC, with an allowable voltage range of 85–264 V AC and a frequency of 50/60 Hz. That input range makes it practical for many industrial power environments and simplifies integration in panels where AC control power is already available.

Q3: Are the outputs relay or transistor?

A: The FX3U-48MR/ES-A uses relay outputs. It provides 24 integrated relay output points, with output load ratings up to 30 V DC or 240 V AC, and a maximum of 2 A per output point. Relay output models are often chosen when users need broader load compatibility or prefer mechanical switching for machine control applications.

Q4: Can this PLC be expanded?

A: Yes. The FX3U-48MR/ES-A is an expandable PLC. Official product information shows support for up to 256 local I/O points and up to 384 local plus remote I/O points, depending on system configuration. This gives users a practical upgrade path when a machine grows beyond the built-in 48 I/O points.

Q5: Is the FX3U-48MR/ES-A suitable for replacement and retrofit projects?

A: Yes, it is often a strong choice for replacement, retrofit, and control panel upgrade projects, especially in systems already built around Mitsubishi FX-series PLCs. Its combination of compact size, relay outputs, AC power input, expandable architecture, and established FX3U platform capabilities makes it a practical solution for restoring or improving machine control without moving to a completely different controller family. Buyers should still confirm I/O requirements, wiring method, and system compatibility before installation.

Meta Description

Buy Mitsubishi FX3U-48MR/ES-A PLC main unit with 48 I/O, 24V DC inputs, 24 relay outputs, 100–240V AC power supply, 64K steps memory, and expandable MELSEC-F FX3U performance for industrial automation.