描述
I. Product Overview
The HKHZ-3U series programmable logic controller (PLC) is a high-performance industrial control productHuakong Electronics, which is 100% compatible with Mitsubishi FX3U series PLC100% compatible with Mitsubishi FX3U series PLC. Product support-Product supportMitsubishi GX Works2 programming softwareallows direct programming and downloading without any format conversion. It has complete functions such as ladder diagram programming, online monitoring, simulation, clock modification, password setting, etc.-.
The product uses32-bit ARM chip (STM32F103VET)As the core processor, the system runs stably, responds quickly, has a long service life, and has a low failure rate. equipType-C download port, making programming connections more convenient. Built inRTC real-time clock, supports clock data read/write and timing operation instructions-1.
. The HKHZ-3U series provides two types:relay output (MR)andtransistor output (MT). The input and output channels range from4-in 4-outArrived18 in 18 out, totaling 8 models, which can meet various needs of industrial automation control from small to medium-sized.
Core keywords:HKHZ-3U PLC | Compatible with FX3U | Programmable Controller | GX Works2 Programming
2, Model Explanation
2.1 HKHZ-3U-8MR-L -4-In 4-Out Relay Output Type
Product positioning:Entry level relay output PLC, cost-effective choice
Product Description: How to Translate
Provided by HKHZ-3U-8MR-L4-channel inputAnd4-channel relay outputThe relay output adoptsOmron relay, Long lifespan and low failure rate-. The relay output can control AC power (below 250V) and DC power (below 30V), and there is no need to distinguish between positive and negative poles when controlling DC-Suitable for controlling small automation equipment.
Core parameters:
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Input/Output Channels:4 in, 4 out
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Output type:Relay output (MR)
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Overall dimensions:96×99×41mm
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Programming software: GX Works2
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Communication interface: RS485 (Modbus RTU)
Applicable scenarios:Small automation equipment, simple logic control, solenoid valve drive
2.2 HKHZ-3U-16MR-L -8-In 8-Out Relay Output Type
Product positioning:Small and medium-sized relay output PLC
Product Description: How to Translate
Provided by HKHZ-3U-16MR-L8 inputsAnd8-way relay outputThe relay output adopts Omron relay, with crisp and clean contact action and solid load capacity-12. The balanced configuration of 8 in and 8 out is suitable for most small and medium-sized industrial control scenarios.
Core Parameters:
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Input/Output Channels:8-In 8-Out
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Output Type:Relay Output (MR)
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Dimensions:125 × 99 × 41mm
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Programming Software: GX Works2
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Communication Interface: RS485 (Modbus RTU)
Applicable Scenarios:Small and Medium sized Automation Equipment, Packaging Machinery, Small Production Lines
2.3 HKHZ-3U-28MR-L -14 In 14 Out Relay Output Type
Product Positioning:Medium relay output PLC
Product description:
HKHZ-3U-28MR-L provides14 inputsAnd14 relay outputs. There are sufficient input and output points, suitable for medium-sized industrial control projects that require a large number of I/O points. Relay output can directly drive loads such as solenoid valves, contactors, indicator lights, etc.-8.
Core parameters:
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Input/output channels:14 in 14 out
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Output type:Relay output (MR)
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External dimensions:150 × 99 × 41mm
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Programming software: GX Works2
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Communication interface: RS485 (Modbus RTU)
Applicable scenarios:Medium sized industrial automation, packaging production lines, material conveying systems
2.4 HKHZ-3U-36MR-L -18 in 18 out relay output type
Product positioning:Large relay output PLC
Product description:
HKHZ-3U-36MR-L provides18 inAnd18 relay output, It is the model with the highest number of I/O points among the HKHZ-3U series relay output types. Suitable for complex industrial control scenarios that require a large number of input and output points.
Core Parameters:
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Input/Output Channels:18 In 18 Out
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Output Type:Relay Output (MR)
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Dimensions:185 × 108 × 49mm
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Programming Software: GX Works2
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Communication Interface: RS485 (Modbus RTU)
Applicable Scenarios:Large industrial automation, complex equipment control, multi station production lines
2.5 HKHZ-3U-8MT-L -4-in-4-out transistor output type
Product positioning:Entry level transistor output PLC
Product description:
HKHZ-3U-8MT-L provides4-channel inputAnd4-channel transistor output. The transistor output adoptshigh-power transistor, which has high current, stability, and durability. Transistor output response speed is fast, suitable for scenarios that require high-speed switch control-.
Core parameters:
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Input/output channels:4-in-4-out
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Output type:Transistor output (MT)
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Dimensions:96 × 99 × 41mm
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Programming software: GX Works2
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Communication interface: RS485 (Modbus RTU)
Applicable scenarios:High speed counting, pulse control, stepper motor drive
2.6 HKHZ-3U-16MT-L -8-in-8-out transistor output type
Product positioning:Small and medium-sized transistor output PLC
Product Description:
HKHZ-3U-16MT-L provides8 inputsAnd8 transistor outputs. The transistor output response time is below 15msBelow 15ms, which is suitable for control scenarios that require fast response. The 8-in-8-out configuration balances both I/O points and response speed.
Core Parameters:
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Input/Output Channels:8-in-8-out
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Output Type:Transistor Output (MT)
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Dimensions:125 × 99 × 41mm
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Programming software: GX Works2
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Communication interface: RS485 (Modbus RTU)
Applicable scenarios:High speed automation equipment, precision positioning control, servo drive
2.7 HKHZ-3U-28MT-L -14 in 14 out transistor output type
Product positioning:Medium transistor output PLC
Product description:
HKHZ-3U-28MT-L provides14 inputAnd14 transistor outputs. The transistor has a fast output response speed, making it suitable for industrial control scenarios that require high-speed pulse output and precise positioning.
Core Parameters:
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Input/Output Channels:14 In 14 Out
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Output Type:Transistor Output (MT)
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Dimensions:150 × 99 × 41mm
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Programming Software: GX Works2
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Communication Interface: RS485 (Modbus RTU)
Applicable Scenarios:Precision positioning control, servo system, high-speed counting application
2.8 HKHZ-3U-36MT-L -18 in 18 out transistor output type
Product positioning:Large transistor output PLC
Product description:
HKHZ-3U-36MT-L provides18 inand18 transistor output, which is the model with the most I/O points in the HKHZ-3U series transistor output type. Suitable for complex industrial control scenarios that require a large number of high-speed I/O points.
Core Parameters:
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Input/Output Channels:18 In 18 Out
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Output Type:Transistor Output (MT)
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Dimensions:185 × 108 × 49mm
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Programming Software: GX Works2
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Communication Interface: RS485 (Modbus RTU)
Applicable Scenarios:Large scale high-speed automation systems, multi axis motion control, complex logic control
III. Technical Parameters
| Project | Specifications |
|---|---|
| Product Name | PLC Programmable Controller |
| Series | HKHZ-3U Series |
| Compatibility | 100% Compatible Mitsubishi FX3U Series PLC- |
| Core Chip | STM32F103VET (32-bit ARM chip) |
| Power Supply Voltage | 24VDC |
| Input Type | Low Speed Bidirectional Optocoupler Isolation Input |
| Output Type | Relay Output (MR)/Transistor Output (MT)- |
| Communication Interface | RS485 Interface |
| Communication Protocol | Modbus RTU- |
| Programming Software | GX Works2- |
| Indicator Light | Power/Run/Error/Input/Output |
| Protection Function | Overcurrent/Overvoltage/Reverse Connection |
| Operating Temperature | -40 ℃~+85 ℃ |
| Working humidity | 0%~80% (non condensing) |
| Installation method | Standard 35mm U-shaped guide rail- |
| RTC clock | Built in real-time clock (with leap year correction function), monthly difference ± 45 seconds/25 ℃-1 |
IV. Product size and selection table
| Model | I/O channel | Output type | External dimensions (mm) |
|---|---|---|---|
| HKHZ-3U-8MR-L | 4 in, 4 out | Relay | 96×99×41 |
| HKHZ-3U-8MT-L | 4 in, 4 out | transistor | 96×99×41 |
| HKHZ-3U-16MR-L | 8 in and 8 out | Relay | 125×99×41 |
| HKHZ-3U-16MT-L | 8 in and 8 out | transistor | 125×99×41 |
| HKHZ-3U-28MR-L | 14 in and 14 out | Relay | 150×99×41 |
| HKHZ-3U-28MT-L | 14 in and 14 out | transistor | 150×99×41 |
| HKHZ-3U-36MR-L | 18 in, 18 out | Relay | 185×108×49 |
| HKHZ-3U-36MT-L | 18 in, 18 out | transistor | 185×108×49 |
Note: The above dimensions are measured manually and may have certain errors (excluding terminal dimensions). Please refer to the actual product for accuracy.
5, Programming method
5.1 GX Works2 software programming
The HKHZ-3U series PLC adoptsMitsubishi GX Works2 softwarePerform programming-GX Works2 is the exclusive programming software for Mitsubishi FX, L, and Q series PLCs, with powerful functions-.
Main functions:
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✅ Ladder Programming : Intuitive and easy-to-use graphical programming approach
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✅ Online Monitoring: Real time Monitoring of PLC Operation Status
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✅Simulation Run: Debugging Programs Without Hardware Connection
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✅Clock Modification: Modifying RTC Clock through Software
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✅ Password setting: Program encryption protection-
Programming language support:Continuous Function Diagram (SFC), Functional Block Diagram (FBD), Structured Text (ST), etc-
5.2 Program Encryption Function
The HKHZ-3U series PLC provides comprehensive program encryption protection function:
Ordinary encryption: Select Online from the menu ->Password/Keyword ->Login/Change Password ->Keyword Protection ->Select 8 digits ->Enter the password twice and click Execute. If successful, the setting is considered successful.
Forgot password: Select "Online" from the menu, then "PLC Memory Operation", and finally "PLC Memory Delete" to delete the password. At the same time, the PLC program will also be deleted.
Super encryption: On the basis of ordinary encryption, setting the password to 12345678 will prevent the password from being modified, making it impossible to download and read programs. The program password can only be deleted together by going online → PLC memory operation → PLC memory deletion.
6, Instruction system
The HKHZ-3U series PLC supports the complete FX3U instruction set, including27 basic instructions and 209 application instructions-1.
6.1 Basic Instructions
| Instruction | Function | Instruction | Function |
|---|---|---|---|
| LD | Start running normally open | AND | Series normally open |
| LDI | Start running normally closed | ANI | Series normally closed |
| LDP | rising edge | ANDP | Serial rising edge |
| LDF | falling edge | ANDF | Serial descent edge |
| OR | Parallel normally open | ANB | Series connection between circuit blocks |
| ORI | Parallel normally closed | ORB | Parallel connection between circuit blocks |
| ORP | Parallel rising edge | OUT | Coil output |
| ORF | Parallel descending edge | SET | Coil positioning |
| MPS | Push it onto the stack | RST | Coil reset |
| MPD | Read stack | PLS | Rising edge output of coil |
| MPP | Pop up stack | PLF | Coil falling edge output |
6.2 Program Flow Instructions
| Instruction | Function |
|---|---|
| CJ | conditional Jump |
| CALL | Subroutine call |
| SRET | Subroutine return |
| IRET | Interrupt return |
| EI | Allow interruption |
| DI | Do not interrupt |
| FEND | Main program ends |
| FOR | Cycle range begins |
| NEXT | End of cycle range |
| WDT | Watchdog timer |
6.3 Transmission and Comparison Instructions
| Instruction | Function | Instruction | Function |
|---|---|---|---|
| CMP | compare | MOV | Data transmission |
| ZCP | Interval comparison | SMOV | Move position |
| FMOV | Multi point transmission | XCH | exchange |
| BCD | BCD conversion | BIN | BIN conversion |
| CML | Reverse transmission |
6.4 Four Logic Operation Instructions
| Instruction | Function | Instruction | Function |
|---|---|---|---|
| ADD | Addition operation | DIV | division operation |
| SUB | Subtraction operation | INC | auto-increment |
| MUL | multiplication operation | DEC | Reduce one by oneself |
| WAND | Logical AND | WOR | logical OR |
| WXOR | Logical XOR | NEG | two's complement |
6.5 High speed processing instructions
| Instruction | Function |
|---|---|
| MTR | Matrix input |
| HSCS | Comparison setting (for high-speed counters) |
| SPD | Pulse density |
| PLSY | pulse output |
| PLSR | With addition and subtraction pulse output |
| PWM | Pulse width modulation |
6.6 Data processing instructions
| Instruction | Function | Instruction | Function |
|---|---|---|---|
| ZRST | Batch reset | MEAN | average |
| DECO | Decoding | SQR | Square root calculation |
| ENCO | coding | FLT | Convert integers to binary floating-point numbers |
| SUM | ON digit | SWAP | High low byte swap |
| BON | Determination of ON digits | SER | data retrieval |
6.7 Floating point operation instructions
| Instruction | Function |
|---|---|
| ECMP | Comparison of Binary Floating Point Numbers |
| EZCP | Comparison of Binary Floating Point Number Intervals |
| EMOV | Binary floating point data transfer |
| EBCD | Binary floating point → decimal floating point |
| EBIN | 10 base floating point → 2 base floating point |
| EADD | Binary floating-point addition operation |
| ESUB | Binary Floating Point Subtraction |
| EMUL | Binary floating-point multiplication operation |
| EDIV | Binary floating-point division operation |
| ESQR | Square root operation of binary floating-point numbers |
| INT | Binary floating point number → BIN integer |
| SIN/COS/TAN | Binary floating point trigonometric operations |
6.8 Positioning Control and Clock Operation Instructions
Positioning control command:ZRN (Origin Regression), PLSV (Variable Pulse Output), DRVI (Relative Positioning), DRVA (Absolute Positioning)
Comparison instruction:LD=, >, <, <=, >=, AND=, >, <, <=, >=, OR=, >, <, <=, >=
Clock Operation Instructions:TCMP (Clock Data Comparison), ZTCP (Clock Data Interval Comparison), TADD (Clock Data Addition), TSUB (Clock Data Subtraction), TRD (Read Clock Data), TWR (Write Clock Data), HOUR (Timing Table)
Other Instructions:CRC (CRC Operation), RS (Serial Data Transmission), ADPRW (MODBUS Read and Write), ASCII (ASCII Data Conversion), HEX (HEX Data Conversion), PID (PID Operation), SEGD (7-segment Decoder)
7, PID instruction support
HKHZ-3U series PLCsupports PID instruction operation, PID parameters need to be set in advance-.
PID instruction format:
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Input:Target value (SV), measured value (PV)
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Output:Output Value (MV)
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Parameters:PID parameters need to be set in advance
PID instructions are widely used in industrial automation scenarios such astemperature control, pressure control, flow controlthat require closed-loop regulation-.
. 8. Communication Function
The HKHZ-3U series PLC is equipped withRS485 communication interface, supportingModbus RTU communication protocol-.
Communication Features:
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✅ Standard Modbus RTU Protocol
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✅ Can communicate with industrial touch screens and PC upper computers-
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✅ Support networking with devices such as frequency converters and sensors-
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✅ Communication parameters can be configured
. Typical applications:is connected to HMI devices such as MCGS touch screens and Weilun Tong touch screens to achieve human-machine interaction-Communicate with temperature and humidity sensors, frequency converters, and other devices to achieve data acquisition and control-.
9, Hardware Design and Quality
9.1 Core chip
product adoptionSTM32F103VET 32-bit ARM chipAs the main controller, it has the characteristics of stable system operation, fast response speed, long service life, and low failure rate-.
9.2 Output components
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Relay output (MR type): AdoptingOmron relayLong lifespan and low failure rate-The relay output can control AC power (below 250V) and DC power (below 30V), and there is no need to distinguish between positive and negative poles when controlling DC-.
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Transistor output (MT type): Usinghigh-power transistor, the current is large, stable, and durable-.
9.3 anti-interference ability
The product hasAnti static, anti lightning surgeFunction, effectively protecting communication interfaces and remote monitoring systems, suitable for complex industrial site environments.
9.4 Operation switch
equipSTOP/RUN operation switchFacilitate on-site switching of PLC operation and stop status.
9.5 Comes with USB to TTL chip
The product comes with a USB to TTL chip, which can be converted throughType-C download portYou can directly connect to the computer for programming download without the need to purchase additional programming cables.
10, Installation method
The HKHZ-3U series PLC adoptsStandard 35mm U-shaped guide rail installation-.
Installation steps:
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Open the packaging box and remove the module
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Prepare standard DIN rails and confirm that the installation position is flat and stable
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Gently lift the buckle and align the guide rail with the installation slot of the module. Slowly slide it in from one end and gently push it to the target position
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Press the buckle to complete the installation of the guide rail
The buckle can be moved up and down, making it convenient for DIN rail installation and removal.
11, Application Fields
The HKHZ-3U series PLC is widely used in various industrial automation control scenarios-:
| field | Typical Applications |
|---|---|
| Metallurgical industry | Melting control, rolling control |
| Textile industry | Weaving machine control, dyeing and finishing control |
| Building automation | HVAC control, lighting control, access control |
| power system | Distribution monitoring and relay protection |
| logistics industry | Sorting control, conveyor line control |
| manufacturing industry | Production line control, equipment automation |
| Intelligent Transportation | Signal light control, tunnel monitoring |
| petrochemical | Process control and safety monitoring |
| automotive industry | Assembly line control, welding control |
Specific application examples:
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Greenhouse environmental monitoring systemCollecting temperature and humidity sensor data through Modbus RTU, combined with touch screen to achieve precise environmental management-
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Intelligent control of temperature and humidity in chicken coopCollaborate with Kingview software to build a temperature and humidity monitoring system-
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PID temperature control systemUsing PID instructions to achieve precise temperature closed-loop control-
12. Model Comparison Summary Table
| Model | I/O Channel | Output Type | Dimensions (mm) | Recommended Scenarios |
|---|---|---|---|---|
| HKHZ-3U-8MR-L | 4-In 4-Out | Relay | 96 × 99 × 41 | Entry level, Simple Logic Control |
| HKHZ-3U-8MT-L | 4-in-4-out | Transistor | 96 × 99 × 41 | Entry level, high-speed switch control |
| HKHZ-3U-16MR-L | 8-in-8-out | Relay | 125 × 99 × 41 | Small and medium-sized equipment, packaging machinery |
| HKHZ-3U-16MT-L | 8-in-8-out | Transistor | 125 × 99 × 41 | Small and medium-sized equipment, precision positioning |
| HKHZ-3U-28MR-L | 14 in 14 out | Relay | 150 × 99 × 41 | Medium scale automation, production line control |
| HKHZ-3U-28MT-L | 14 in 14 out | Transistor | 150 × 99 × 41 | Medium scale automation, servo control |
| HKHZ-3U-36MR-L | 18 in 18 out | Relay | 185 × 108 × 49 | Large scale automation, multi station control |
| HKHZ-3U-36MT-L | 18 in 18 out | Transistor | 185 × 108 × 49 | Large scale high-speed system, multi axis control |
Thirteen, purchase guide
Select according to output type:
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Relay Output (MR Type)→ Suitable for controlling AC loads (solenoid valves, contactors, indicator lights, etc.), with strong load capacity, and can control DC without distinguishing positive and negative poles-
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Transistor Output (MT Type)→ Suitable for high-speed switch control, pulse output, servo drive, etc., with fast response speed-
Select by I/O points:
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4-in-4-out→ HKHZ-3U-8MR-L/HKHZ-3U-8MT-L (small equipment, simple control)
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8-in-8-out→ HKHZ-3U-16MR-LT-L/HKHZ-3U-16MT-L (small and medium-sized equipment, packaging machinery)
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14 in and 14 out→ HKHZ-3U-28MR-L/HKHZ-3U-28MT-L (medium-sized automation, production line)
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18 in, 18 out→ HKHZ-3U-36MR-L/HKHZ-3U-36MT-L (large automation, complex control)
14, Summary
The HKHZ-3U series programmable controller is a100% compatible with Mitsubishi FX3U series PLCHigh cost-effective industrial control products-The product has the following core advantages:
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✅Perfect compatibility with FX3U: Supports GX Works2 direct programming, ladder diagrams can be downloaded and run without conversion-
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✅ 32-bit ARM coreSTM32F103VET chip, runs stably and responds quickly
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✅Complete Instruction Set: Supports 27 basic instructions and 209 application instructions-1
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✅RTC Real time Clock: Built in clock, supports clock operation instructions-1
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✅ RS485 communicationSupports Modbus RTU protocol for easy networking-
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✅ Two output types: Relay output (MR) and transistor output (MT) are optional-
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✅8 models to choose from: from 4-in-4-out to 18-in-18-out, covering various application needs
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✅ Industrial-grade quality-40 ℃~+85 ℃ wide temperature operation, overcurrent and overvoltage reverse connection protection
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✅ DIN35 rail installationStandard rail installation, convenient and efficient
The HKHZ-3U series PLC has been widely used inMetallurgical, textile, building automation, power system, logistics, manufacturing, intelligent transportation, petrochemical, and automotive industriesWaiting for many fields-.
For more product details or customized solutions, please feel free to consult our suppliers.




