The LK3U PLC is a powerful Mitsubishi-compatible industrial control system designed for stable and reliable automation. It provides cost-effective solutions for equipment intelligence upgrades and industrial automation applications. With advanced features, high-speed processing, and versatile communication options, the LK3U PLC is an excellent choice for industrial control systems.
Key Features:
✅ Compatible with Mitsubishi PLC series – Ensuring easy integration into existing systems
✅ Stable and powerful performance – Reliable quality for industrial automation
✅ Flexible input and output options:
- Input signal: DC24V, NPN, minimum drive current 10mA
- MR model output: Relay type, max AC250V/DC30V, < 3A (peak 5A)
- MT model output: Transistor type, DC24V NPN (active low), < 500mA
✅ Analog Input: Default 0-10V (24-bit accuracy), optional 0-20mA or NTC (NTC10k/NTC50k)
✅ Analog Output: 0-10V
✅ High-speed Processing: - High-speed input: X0-X1 at 60KHz
- MT series high-speed output: Y0-Y7, 200KHz (6 channels) / 100KHz (2 channels)
✅ Communication Ports: - 1x RS232: Supports Mitsubishi programming port protocol, default baud rate 19200, enables program download and touchscreen connectivity
- 2x RS485: Supports Modbus RTU/non-protocol communication, Mitsubishi programming port protocol, default baud rate 19200
✅ CAN Communication Port (optional): Internal networking support
✅ Weighing Sensor (optional): 5V four-wire sensor with 24-bit accuracy
Applications:
Industrial automation
Equipment intelligence upgrades
Smart manufacturing control
Touchscreen and inverter connectivity
With its robust design and high performance, the LK3U PLC ensures efficiency and precision in industrial control systems, making it a cost-effective alternative to Mitsubishi PLCs.
LK3U PLC
| Model | DI | DO | Analog Input | Analog Output | Pulse input | Pulse output | Communication port | Weight Module/Ethernet Port | |
| LK3U-14MR-4AD-2DA | 8 | 6 | 4(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module | / | |
| LK3U-14MT-4AD-2DA | 8 | 6 | 4(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | 4 | 1 channel RS232, 2 channel RS485; Option 1 can module | / | |
| LK3U-20MR-4AD-2DA | 12 | 8 | 4(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module | / | |
| LK3U-20MT-4AD-2DA | 12 | 8 | 4(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | 4 | 1 channel RS232, 2 channel RS485; Option 1 can module | / | |
| LK3U-32MR-10AD-2DA | 16 | 16 | 10(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module | Optional | |
| LK3U-32MT-10AD-2DA | 16 | 16 | 10(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | 8 | 1 channel RS232, 2 channel RS485; Option 1 can module | Optional | |
| LK3U-48MR-10AD-2DA | 24 | 24 | 10(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module | Optional | |
| LK3U-48MT-10AD-2DA | 24 | 24 | 10(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | 8 | 1 channel RS232, 2 channel RS485; Option 1 can module | Optional | |
| LE3U-64MR-10AD-2DA | 32 | 32 | 10(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module | Optional | |
| LE3U-64MT-10AD-2DA | 32 | 32 | 10(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | 8 | 1 channel RS232, 2 channel RS485; Option 1 can module | Optional | |
| LE3U-80MR-10AD-2DA | 40 | 40 | 10(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | / | 1 channel RS232, 2 channel RS485; Option 1 can module | Optional | |
| LE3U-80MT-10AD-2DA | 40 | 40 | 10(Default0-10v,0-20ma,ntc10k,pt100) | 2(0-10v/0-20ma) | 2 | 8 | 1 channel RS232, 2 channel RS485; Option 1 can module | Optional |
LK3U Standard Edition Features
| Communication | 1 channel 232, 9-pin serial interface definition 2 (TXD sending) 3 (RXD receiving) 5 grounding, support Mitsubishi programming port communication protocol, can download programs to connect to various touch screens, etc.: communication distance, up to 10 meters 2 channels 485, interface definition A and B, support Mitsubishi programming port/Modbus RTU/RS protocol, can be connected to various touch screens, inverters, etc.; communication distance, up to 1000 meters |
| Analog | AD input: default (0-10V) can be changed to (0-20ma) DA output: The output is compatible with voltage and current. When connected to G- V+, it is 0-10V output, and when connected to G- I+, it is 0-20ma output. |
| High-speed pulse | Input: The default is 2 channels (X0 60khz x1 10khz) Output: LK3U-14/20/24 is 4-way (Y0-Y3 200khz): LK3U-32/48/64 is (Y0-Y5 200khz. Y6-Y7 100khz) |
LK3U Optional Features
| High-speed input expansion | High-speed input can add 4 channels (x2 10khz X3 60khz X4-X5 10khz) |
| Thermal resistance temperature ntc | AD can be customized as temperature input NTC10K (-40-150°C) or NTC 50K (-40-209°C) up to the number of corresponding AD channels |
| Weighing function | Up to 2 weighing interfaces can be opened, E+ E- S+ S- four-wire interface: excitation voltage 5V; signal voltage range -20mV+20mV; data collection frequency 10HZ |
| CAN communication | Mode 1: Connect multiple industrial control boards, expand I0 point or analog temperature, etc., without any delay in response speed, up to 320 channels, expand analog temperature input, do not occupy 485 and 232 communication ports Mode 2: Connect our dedicated expansion IO/analog module ***Only one of the modes can be selected |
IO Expansion module
| LK8EX8EYR | Dimensions 118*88*45 Installation hole distance 95*37 | 8 input 8 relay output | input X00-X117 output Y100-Y117 | Max 2 |
| LK8EX8EYT | Dimensions 118*88*45 Installation hole distance 95*37 | 8 input 8 transistor output | input X00-X117 output Y100-Y117 | Max 2 |
| LK-16EX | Dimensions 118*88*45 Installation hole distance 95*37 | 16 input | X120-X157 | Max 2 |
| LK-16EYR | Dimensions 118*88*45 Installation hole distance 95*37 | 16 relay outputs | Y120-Y157 | Max 2 |
| LK-16EYT | Dimensions 118*88*45 Installation hole distance 95*37 | 16 transistor outputs | Y120-Y157 | Max 2 |
The expansion module must activate the can function
Analog/Weighing/Temperature Expansion Module
| E4DA | Dimensions 118*88*45 Installation hole distance 95*37 | 4 analog outputs, compatible 0-10V/0-20ma | D1000-D1015 | Max 2 |
| E8AD | Dimensions 118*88*45 Installation hole distance 95*37 | 8 analog inputs, compatible 0-10V/0-20ma | D1016-D1023 | Max 2 |
| E2WH | Dimensions 118*88*45 Installation hole distance 95*37 | 2-channel weighing，S+ S- E+ E- | D1048-D1055 each channel occupies 2 registers (fault address M1048-M1051) | Max 1 |
| E4WH | Dimensions 118*88*45 Installation hole distance 95*37 | 4 channel weighing，S+ S- E+ E- | D1048-D1055 each channel occupies 2 registers (fault address M1048-M1051) | Max 1 |
| E2TC | Dimensions 118*88*45 Installation hole distance 95*37 | 2-channel thermocouple, type K | D1036-D1047 (fault address M1036-M1047) | Max 2 |
| E4TC | Dimensions 118*88*45 Installation hole distance 95*37 | 4-channel thermocouple, type K | D1036-D1047 (fault address M1036-M1047) | Max 2 |
| E6TC | Dimensions 118*88*45 Installation hole distance 95*37 | 6-channel thermocouple, type K | D1036-D1047 (fault address M1036-M1047) | Max 2 |
| E2PT | Dimensions 118*88*45 Installation hole distance 95*37 | 2-channel PT100 | D1024-D1035 (fault address M1024-M1035) | Max 2 |
| E4PT | Dimensions 118*88*45 Installation hole distance 95*37 | 4-channel PT100 | D1024-D1035 (fault address M1024-M1035) | Max 2 |
| E6PT | Dimensions 118*88*45 Installation hole distance 95*37 | 6-channel PT100 | D1024-D1035 (fault address M1024-M1035) | Max 2 |
Hello,
What are the retentive area’s of memory? Is retentive memory eeProm or battery backup?
Can you have 2 types of AI 4 x NTC 10K & 4 x 0-20mA?
Can you use GX Works 2 to program?
please check our manual,it use battery.
analog can choose NTC or 0-20mA.
Thanks for your reply,
Is there a manual I can download?
I have been trying to find out the Beta of the NTC. Is it 3435 or 3950?
I need 5 weighing point additional
Muy buenas estimad@s en la linea LK3U veo que tiene para celula de pesaje pero mi duda es: que tan exacta es, cual es la velocidad de refresqueo(HZ) y si tiene algun video o ejemplo real para mas informacion. gracias saludos
Weighing corresponding wiring +EXE, +SIG, -EXE, -SIG are positive excitation and positive signal respectively
Negative excitation, negative signal, voltage range -20mV ~ +20mV, refresh frequency 10zh 24-bit precision
Plz tell me can you arrang plc for me with 5 weighing connection point
hi, max is 2 channel
i need lk3u 20mr 4ad 2da plc ladder example for 0-10v how can we read in ladder anlogue please we cant read 0-10v in ladder please help
here is analog input example https://www.xueplc.com/wp-content/uploads/2022/06/3U-analog-input.zip
I want to purchase as holesalle markete price plc with 5 weighing connections point
pode ligar a celula direto no clp ?
hx711 ja tem no clp ou precisa compar e colocar?
Onde ligar a celula?
No clp ou em uma placa hx711?
Liguei no clp não funciona
PLC URGENT
I had sent you email . did you get it?
Hello, very good. I would like to know if the PLC LK3U with weighing channel can control a dynamic scale or is it only static?
it support 5V sensor.
HELLO. I want to disable the upload function. Is this possible?
can only prevent downloading
Hello, I have a problem after programming PLC into LK3U-32MR.
The red error alarm indicator is displayed.
What should I do to fix it?
There may be incompatible commands
Hello
I would like to buy PLC and HMI
How I can contact you?
ok
Hello? this PLC can used Strucrured text and user fb/fun ?
not
Xin chào,
Cho mình hỏi thời gian thực của các dòng PLC LE3u, LK3u, Fk3u và HMI Kinseal thì loại nào chạy đúng nhất trong 4 loại thiết bị mình vừa nêu ra. Vì có luồng ý kiến PlC hãng chạy đúng với thời gian thực nhất, nhưng cũng có ý kiến HMI tốt hơn. Vì vậy, mong rằng bạn giải đáp thắc mắc này cho mình !
Xin chân thành cảm ơn.
lk3u is well
Cảm ơn ChinaPLc rất nhiều !
– Vì sao tốc độ baud của PLC LE3U, LK3U và FK3U là 38400bps
– Nhưng khi truyền thông RS485 với HMI Kinseal 7.3inch, thì tôi chỉnh tốc độ baud của HMI là 38400kps sẽ báo lỗi truyền thông ! Nhưng mà tôi chỉnh lại 9600kps thì lại không báo lỗi ?
Vậy lý do gì mà PLC và HMI không thể truyền thông với nhau ở tốc độ 38400kps ?
the plc only support 9600
– PLC hỗ trợ truyền thông RS485 là 9600kps và RS422 là 38400kps phải không ?
rs232 9600 E 7 1
– PLC board LK3U có thể dùng Label như PLC chính hãng không ?
– Và LK3U có thể tạo nhiều chương trình Main trong POU không ?
yes,support
Có hổ trợ Function Blcok không ?
Tôi dùngg lệnh TRD trên board PLC LK3U và đã ” get time from PC” nhưng thời gian trên PLC vẫn bị lệch?
Lý do vì sao ?