FX3U-4LC Mitsubishi MELSEC FX Series Temperature Control Module, 4-Channel PID Controller Thermocouple Input

FX3U-4LC

Mitsubishi FX3U-4LC Module

4-Channel Temperature Control

FX3U-4LC

The Mitsubishi FX3U-4LC Module is a 4-channel temperature control solution for precise regulation in industrial automation systems, supporting thermocouples and RTDs with PID functionality.

Specification

SEODescription

The Mitsubishi FX3U-4LC Module is a 4-Channel Temperature Control module designed for precise regulation in industrial automation systems. Integrated with the FX3U series PLCs, it supports four independent channels compatible with thermocouples (K, J, R, S, E, T, N, PLII, U) or RTD sensors (Pt100, JPt100), enabling simultaneous monitoring and control of heating or cooling devices via transistor or relay outputs. The module operates on 24 VDC power and functions within a temperature range of 0–55°C, ensuring reliability in harsh environments. It communicates via the FX3U PLC's built-in RS-422/USB interface and supports PID control algorithms for optimized thermal stability. Ideal for industries like food processing, plastics manufacturing, and chemical plants, the FX3U-4LC offers compact integration and high accuracy. However, its dependency on the host PLC for programming and limited standalone functionality may require additional system configuration.

SEOSpecification

Parameter	Specification
Model	FX3U-4LC
Module Type	Mitsubishi FX3U-4LC Module
Control Channels	4-Channel Temperature Control
Input Type	Thermocouple (K/J/R/S/E/T) / Platinum Resistor (Pt100)
Temperature Range	-100°C to 1300°C (K-type), -200°C to 600°C (Pt100)
Resolution	0.1°C / 0.1°F
Control Method	PID / ON-OFF Control
Output Type	Transistor (2 outputs per channel) / Relay (optional)
Communication Interface	RS-422/485 (Built-in)
Power Supply	24V DC ±10% (50mA)
Mounting	DIN Rail or Screw Mounting
Operating Temperature	0°C to 55°C
Dimensions	90mm (W) × 87mm (H) × 90mm (D)

SEOQandA

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question:Do you accept payment after delivery?
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question:How handle refurbished product failures?
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SEOQandA_Product

question:How to resolve incorrect temperature readings on FX3U-4LC?
answer:Verify sensor wiring matches the manual and ensure correct sensor type is selected in parameter settings.
question:Why does FX3U-4LC fail to communicate with the PLC?
answer:Check DIP switch settings for correct module address and validate FROM/TO instruction addressing in the program.
question:How to stabilize erratic temperature control with FX3U-4LC?
answer:Adjust PID parameters (P, I, D) via configuration software and increase sampling cycle if noise is present.
question:What causes the ERROR LED to light on FX3U-4LC?
answer:Check error code via diagnostic function; common causes include sensor disconnection or input range exceedance.
question:Why does FX3U-4LC show wrong sensor type data?
answer:Reconfigure the input type via parameter mode (e.g., K/J/T for thermocouples, Pt100 for RTD) to match the sensor.