Description
Managing complex logic and high-speed device automation is the core function of the Mitsubishi Electric FX5U-32MR/DS, a high-performance central processing unit belonging to the MELSEC iQ-F family. This compact controller integrates advanced processing capability with built-in analog and serial interfaces, making it an efficient solution for standalone machines and distributed control topologies. With a DC power input and a hybrid arrangement of sink/source inputs and robust relay outputs, this unit provides exceptional operational reliability in harsh industrial environments.
Key Features
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High-Speed Execution: Built-in program execution speeds down to 34 nanoseconds per basic instruction.
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Integrated I/O Configuration: Equipped with 16 digital inputs (24 VDC, sink/source) and 16 digital relay outputs.
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Embedded Analog Channels: Features 2-channel analog inputs (0 to 10 VDC) and 1-channel analog output (0 to 10 VDC) for local sensor and actuator control.
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Industrial Communications: Built-in Ethernet port for network configuration and an RS-485 port for multi-drop serial configurations.
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Data Management: Integrated SD memory card slot for seamless data logging, program transfer, and backup routines.
Applications
- Precision multi-axis packaging and bottling machinery.
- Water treatment facilities, telemetry, and pumping controls.
- Automated sorting systems and conveyor line synchronization.
- Enclosed HVAC system management and cleanroom control units.
Technical Specifications
| Manufacturer |
Mitsubishi Electric |
| Model Number |
FX5U-32MR/DS |
| Product Series |
MELSEC iQ-F Series |
| Power Supply Voltage |
24 VDC (+20%, -15%) |
| Power Consumption |
30 W |
| Digital Inputs |
16 Points (24 VDC, Sink/Source selectable) |
| Digital Outputs |
16 Points (Relay outputs, 2 A per point) |
| Built-in Analog Inputs |
2 Channels (0 to 10 VDC, 12-bit conversion) |
| Built-in Analog Output |
1 Channel (0 to 10 VDC, 12-bit conversion) |
| Communication Interfaces |
1x Ethernet (100Base-TX/10Base-T), 1x RS-485 |
| Operating Temperature |
0 to 55 degC |
| Programming Software |
GX Works3 |
| Shipping Weight (Calculated) |
0.70 kg (1.54 lbs) |
| Package Dimensions (Calculated) |
150 mm x 110 mm x 100 mm |
Connections and Interfaces
| Terminal Block Designation |
Signal / Circuit Assignment |
| L+ / M |
24 VDC Primary Power Input and Common Ground |
| S/S |
Sink/Source Selectable Input Common Terminal |
| X000 to X017 |
24 VDC Discrete Inputs (16 Points) |
| COM0 to COM3 |
Common Terminal Points for Relay Output Groups |
| Y000 to Y017 |
Discrete Relay Outputs (16 Points, 2 A/point max) |
Alternative Models & Compatibility
The FX5U-32MR/DS utilizes a 24 VDC operational power input, distinguishing it from the standard AC-powered FX5U-32MR/ES model. When upgrading existing legacy FX3U-32MR/DS installations, verify the physical dimensional footprint differences and ensure that the legacy system project is converted within GX Works3 to match the high-speed execution profiles and direct terminal configurations of the iQ-F architecture.
Application Pitfalls & Engineering Notes
The integrated analog input channels (0 to 10 VDC) are highly sensitive to electromagnetic interference. It is critical to route analog signal cables entirely separate from high-current AC motor leads or VFD cables. Always utilize twisted, double-shielded copper wiring for analog runs and ground the shielding foil exclusively at the control cabinet ground star point to prevent low-frequency earth loops from distorting signal conversions.
Commissioning & Wiring Tips
The sinking or sourcing logic of the discrete inputs is determined by terminal S/S. For a standard NPN/sink configuration, wire the S/S terminal directly to the +24V supply. For a PNP/source configuration, wire the S/S terminal to the 0V common. Ensure all screw-type terminal connections are torqued between 0.5 to 0.8 N-m to maintain secure electrical contact without compromising terminal integrity.
Installation Guidelines
CRITICAL WARNING: Complete physical isolation and de-energization of all power circuits are mandatory before mounting, wiring, or executing maintenance tasks on the CPU. Always use a calibrated digital multimeter to confirm the complete absence of voltage at the terminal blocks. Failure to isolate input power may lead to permanent processor destruction, terminal arcing, or catastrophic personal injury.
1
Mount the CPU module securely onto a standard 35mm symmetrical DIN rail inside a protective, IP54-rated metal enclosure to prevent environmental particulate ingress.
2
Establish a low-impedance connection from the SG terminal directly to a dedicated control ground point with a wire cross-section of at least 2.0 mm2.
3
Terminate the field wiring with clean crimp-on insulated bootlace ferrules before clamping the connections to the removable terminal blocks.