The LK3U-20MR/MT-4AD-2DA is a compact, Mitsubishi FX3U-compatible PLC controller designed for industrial automation tasks requiring both digital and analog control. It features 12 digital inputs and 8 digital outputs (available in relay or transistor configurations), along with 4 analog inputs and 2 analog outputs. The controller supports RS485 communication, high-speed pulse inputs and outputs, and is programmable via GX Developer or GX Works2 software. Its compact size (125 x 117 x 60 mm) makes it suitable for space-constrained control panels.
Key Features:
- Digital Inputs/Outputs: 12 digital inputs and 8 digital outputs (relay or transistor type).
- Analog Inputs/Outputs: 4 analog inputs and 2 analog outputs, supporting 0–10V/0–20mA signals.
- Communication Ports: Equipped with RS232 and RS485 ports for versatile connectivity.
- Programming Compatibility: Compatible with Mitsubishi GX Developer and GX Works2 software.
- Compact Design: Space-saving dimensions of 125x117x60 mm.
Instructions for Use
Installation:
- Mounting: Secure the PLC onto a DIN rail or panel, ensuring proper ventilation.
- Wiring: Connect the digital and analog I/O terminals according to the wiring diagram provided in the user manual.
- Power Supply: Provide a stable 24V DC power source to the PLC.
- Programming: Use Mitsubishi GX Developer or GX Works2 to develop and upload control programs via the RS232 or RS485 port.
Usage Scenarios:
- Industrial automation systems require both digital and analog signal processing.
- Applications need reliable communication interfaces for data exchange.
- Projects where space-saving and cost-effective PLC solutions are desired.
Precautions:
- Ensure all wiring is done with the power supply turned off to prevent electrical hazards.
- Avoid exposing the PLC to extreme temperatures, moisture, or corrosive environments.
- Regularly back up your control programs to prevent data loss.
Related Videos
Frequently Asked Questions (FAQ)
Q1: What is the difference between the MR and MT models?
A: The MR model features relay outputs, suitable for general-purpose applications, while the MT model has transistor outputs, ideal for high-speed switching tasks.
Q2: Can I expand the I/O capacity of this PLC?
A: Yes, the LK3U series supports expansion modules to increase the number of inputs and outputs as needed.
Q3: Is the PLC compatible with other HMI devices?
A: Yes, the PLC can communicate with various HMI devices through its RS232 or RS485 ports using standard communication protocols.
Q4: Is the LK3U-20MR/MT-4AD-2DA compatible with Mitsubishi programming software?
A: Yes, it is compatible with Mitsubishi GX Developer and GX Works2 software, facilitating ease of programming for users familiar with Mitsubishi platforms.
Q5: Does the PLC support high-speed pulse inputs and outputs?
A: Yes, it offers 2 channels of high-speed pulse input (up to 60 KHz) and 4 channels of high-speed pulse output (up to 200 KHz).
Q6: What communication interfaces are available?
A: The PLC supports RS232 and dual RS485 ports, enhancing connectivity with various devices.
Q7: What is the power supply requirement for the PLC?
A: The PLC operates on a 24V DC power supply, standard for industrial control systems.
User Evaluation Summary
Pros:
- Versatility: Combines digital and analog I/O in a compact form factor.
- Compatibility: Works seamlessly with Mitsubishi programming software.
- Cost-Effective: Offers a balance between functionality and affordability.
Cons:
- Documentation: Some users have noted that the user manual could be more detailed.
- Software Licensing: Requires access to Mitsubishi’s programming software, which may involve additional costs.
Competitive Product Comparison
| Feature | LK3U-20MR/MT-4AD-2DA | AMSAMOTION AMX-FX3U-20MR/MT | Siemens S7-1200 |
|---|---|---|---|
| Digital I/O | 12 inputs / 8 outputs | 12 inputs / 8 outputs | Varies by model |
| Analog I/O | 4 inputs / 2 outputs | 4 inputs / 2 outputs | Requires modules |
| Communication Ports | RS232, RS485 | RS232, RS485 | PROFINET, Ethernet |
| Programming Software | GX Developer / GX Works2 | GX Developer / GX Works2 | TIA Portal |
| Price Range | Affordable | Affordable | Higher |
Technical Specifications
- Model: LK3U-20MR/MT-4AD-2DA
- Dimensions: 125 x 117 x 60 mm
- Digital Inputs: 12 channels
- Digital Outputs: 8 channels (Relay for MR model, Transistor for MT model)
- Analog Inputs: 4 channels (0–10V/0–20mA)
- Analog Outputs: 2 channels (0–10V/0–20mA)
- Communication Ports: RS232, RS485
- Power Supply: 24V DC
- Programming Software: Mitsubishi GX Developer, GX Works2
For a visual overview and demonstration, you can refer to the following video:
Brand Story or Manufacturer Background
The LK3U series is developed by Lingkong, a company specializing in industrial automation solutions. Their products are designed to be compatible with Mitsubishi’s FX3U series, offering users a cost-effective alternative without compromising on performance.
Purchase Recommendations
- AliExpress: LK3U-20MR/MT-4AD-2DA PLC Controller
- eBay: LK3U-20MR/MT-4AD-2DA PLC Controller
For more information or to purchase the LK3U-20MR/MT-4AD-2DA PLC Controller, visit the official product page.
This post may contain affiliate links. Read the full disclosure here.