LK3U-14-4AD-2DA Compact PLC
- Available in relay, transistor, and mixed output types
- High-speed input expandable up to 6 channels
- Supports 0-10V, 0-20mA, NTC10K, NTC50K, and PT100
- Optional CAN expansion for PLC or module connection
- Optional 2-channel weighing function with 24-bit acquisition
- Optional Ethernet port supporting MELSOFT and MODBUS TCP
Model Options
Choose the output type based on your application requirements
LK3U-14MR-4AD-2DA
8 NPN inputs, DC24V
6 relay outputs
AC250V / DC0–30V < 3A
LK3U-14MT-4AD-2DA
8 NPN inputs, DC24V
6 transistor outputs
DC24V < 0.5A (NPN)
LK3U-14MRT-4AD-2DA
8 NPN inputs, DC24V
4 transistor + 2 relay outputs
Mixed output type
Core Features
Communication
2 × RS485 and 1 × RS232 for flexible device communication
High-Speed Control
Up to 4-channel 200KHz pulse output and expandable high-speed input
Analog & Temperature
Supports voltage, current, and temperature signal types
Flexible Expansion
Optional CAN, weighing, and Ethernet functions
CAN Expansion
- Supports CAN communication interface
- Enables PLC-to-PLC data sharing (N:N network)
- Supports expansion module connection via CAN bus
High-Speed Input Expansion
- Default 2 high-speed input channels
- Expandable up to 6 channels total
- Supports AB-phase and single-phase counting
- Maximum response frequency up to 100KHz
Analog & Temperature Input
- Supports voltage input: 0–10V
- Supports current input: 0–20mA
- Supports NTC10K / NTC50K temperature sensors
- Supports PT100 temperature input (-50℃ to 500℃)
Weighing Function
- Supports 2-channel weighing input
- 24-bit high-resolution data acquisition
- 5V excitation, four-wire sensor connection
- Signal range: -20mV to +20mV
Ethernet Communication
- Supports MELSOFT protocol connection
- Supports MODBUS TCP communication
- Suitable for remote monitoring and integration
Specifications
| Digital Input | 8 NPN, DC24V |
| Digital Output | 6 outputs (relay / transistor / mixed) |
| Analog Input | 4 channels |
| Analog Output | 2 channels |
| Communication | 2 × RS485, 1 × RS232 |
| High-Speed Input | X0: 60KHz, X1: 10KHz (expandable) |
| High-Speed Output | 4 × 200KHz |
| Analog Types | 0-10V / 0-20mA / NTC / PT100 |
| Optional Functions | CAN / Weighing / Ethernet |
| Software | GX Developer / GX Works2 |
Why Choose LK3U-14-4AD-2DA
Integrated control, analog, motion, and optional expansion in one compact PLC platform
| Feature | LK3U-14-4AD-2DA | Project Value |
|---|---|---|
| Digital I/O | 8 NPN inputs / 6 outputs | Compact I/O structure for small automation systems |
| Analog Processing | 4 analog inputs / 2 analog outputs | Suitable for mixed signal monitoring and control |
| Communication | 2 × RS485 + 1 × RS232 | Flexible connection for HMI, serial devices, and system integration |
| High-Speed Pulse Output | 4 × 200KHz | Supports motion and pulse control applications |
| High-Speed Input Expansion | Default 2 channels, expandable up to 6 | More flexibility for encoder and counting requirements |
| Signal Types | 0–10V / 0–20mA / NTC / PT100 | Handles voltage, current, and temperature signals in one platform |
| Optional Expansion | CAN / Weighing / Ethernet | Better fit for customized control projects |
| Software Compatibility | GX Developer / GX Works2 | Convenient for FX3U-related programming workflows |
Applications
Suitable for compact automation projects requiring digital control, analog processing, motion control, and flexible communication.
Small Automation Equipment
Suitable for compact machines and control cabinets that require 8 digital inputs, 6 outputs, analog I/O, and serial communication.
Temperature Monitoring
Supports temperature acquisition using NTC10K, NTC50K, and PT100 input types for heating, cooling, and process monitoring applications.
Analog Signal Control
Supports 0–10V and 0–20mA signal acquisition and output for sensor input, transmitter feedback, and analog control tasks.
Motion & Positioning
High-speed pulse output and expandable high-speed input make it suitable for positioning, pulse control, encoder counting, and related motion tasks.
Weighing Systems
Optional weighing function supports 2-channel load signal acquisition for weighing, dosing, and batching related control systems.
Multi-Device Communication
With 2 × RS485, 1 × RS232, and optional Ethernet or CAN expansion, it fits systems that need HMI, PLC, and device networking.
FAQ
Is this PLC compatible with FX3U?
Yes, it supports FX3U programming structure and GX Developer / GX Works2 software.
What signal types are supported?
Supports 0–10V, 0–20mA, NTC10K, NTC50K, and PT100.
Does it support motion control?
Yes, it supports high-speed pulse output up to 200KHz.
Can it support weighing applications?
Yes, optional 2-channel weighing function is available.
Need the Right LK3U Model for Your Project?
Select MR, MT, or MRT output type and configure optional functions such as analog, weighing, or communication based on your application requirements.
Technical documents and configuration support are available upon request.