FX3U-32MR/ES-A 32 I/O PLC CPU Unit 16DI/16DO Relay | Mitsubishi Electric

The Original New Mitsubishi Electric FX3U-32MR/ES-A is a high-end compact programmable logic controller (PLC) CPU unit from the MELSEC-F FX3U series, designed for advanced machine control and industrial automation. Featuring 16 digital inputs (24 V DC, sink/source), 16 relay outputs (2 A per point), and 64K steps built-in RAM program memory, it delivers 0.065 μs per basic instruction processing speed. Built-in RS-422 and USB ports, real-time clock, and high-speed counter functions reduce the need for additional modules. The FX3U series supports up to 256 direct I/O points and 384 points with CC-Link remote I/O, making it suitable for packaging, material handling, and OEM machinery applications requiring high-speed processing and scalability.

Core Engineering Highlights:
16 digital inputs (24 V DC, sink/source) | 16 relay outputs (2 A per point, 240 V AC / 30 V DC) | 64K steps RAM program memory | 0.065 μs/basic instruction processing speed | Built-in RS-422 + USB programming ports | Built-in real-time clock | High-speed counters: 6 × 100 kHz + 2 × 10 kHz (single-phase) | 256 direct I/O points / 384 with CC-Link | 100–240 V AC power supply | 150 × 90 × 86 mm | 0.65 kg

Key Features:

• Original New Mitsubishi Electric FX3U-32MR/ES-A CPU unit

• 16 digital inputs, 24 V DC sink/source configurable

• 16 relay outputs (normally open contacts) for AC/DC load switching

• 64K steps built-in RAM program memory, expandable via memory cassette

• 0.065 μs/basic instruction and 0.642 μs/application instruction processing speed

• Built-in RS-422 port for programming and HMI communication

• Built-in USB port for direct PC connection

• Built-in real-time clock for time-based control

• Built-in RUN/STOP switch for local operation control

• Supports run-time program writing via programming software

• High-speed counter function: 100 kHz × 6 points + 10 kHz × 2 points (single-phase); 50 kHz × 2 points (two-phase)

• Input interrupt function with minimum 5 μs ON/OFF width (X000–X005)

• Pulse output function: 3 axes at 100 kHz (transistor output models)

• Expansion: up to 8 FX2N/FX3U series special function modules, up to 256 direct I/O points

• CC-Link remote I/O support: up to 384 total I/O points

• Function expansion boards and adapters can be connected on the left side

• Battery-free EEPROM operation for program retention

• DIN rail mounting (150 mm width)

Applications:

• Packaging machinery and assembly lines

• Material handling and conveyor control

• OEM machine automation and equipment integration

• General factory automation and industrial control

• Applications requiring relay output switching and high-speed processing

• Systems requiring CC-Link network expansion

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi Electric MELSEC-F FX3U series architecture. Module compatibility should be verified before installation.

• Expansion units: FX2N series I/O expansion units and special function modules (up to 8 modules)

• Function expansion boards: FX3U-232-BD (RS-232C), FX3U-485-BD (RS-485), FX3U-ENET-ADP (Ethernet)

• Special adapters: FX3U-4AD-ADP (analog input), FX3U-4DA-ADP (analog output), FX3U-4HSX-ADP (high-speed input)

• CC-Link communication: requires FX2N-32CCL interface module

• Programmed using GX Works2 or GX Developer 8.23Z or later

Related Products:

• FX3U-16MR/ES-A – 16 I/O version (8 inputs / 8 relay outputs)

• FX3U-32MT/ES-A – 32 I/O version with transistor outputs (sink)

• FX3U-48MR/ES-A – 48 I/O version (24 inputs / 24 relay outputs)

• FX3U-64MR/ES-A – 64 I/O version (32 inputs / 32 relay outputs)

• FX3U-4AD-ADP – 4-channel analog input adapter

• FX3U-4DA-ADP – 4-channel analog output adapter

• FX3U-232-BD – RS-232C function expansion board

• FX3U-485-BD – RS-485 function expansion board

• FX3U-ENET-ADP – Ethernet adapter

• FX2N-32CCL – CC-Link interface module

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Mitsubishi Electric and MELSEC are trademarks of Mitsubishi Electric Corporation.