Best All-in-One PLC Solutions for Modern Automation
Discover top all-in-one PLCs that bundle PLC logic, HMI capabilities, and I/O in one unit. This guide targets engineers, technicians, and plant operators seeking compact, integrated control panels that simplify wiring and programming. The selections below emphasize devices that support high-speed I/O, encoder feedback, analog inputs/outputs, and user-friendly software. Each product is chosen for specific use cases—broad automation, servo control, or compact panel integration—so you can pick the best fit for your application.
Summary of selected products:
- Product A: 2.8″ TFT HMI with 7 inputs and 5 relays, high-speed outputs for servo/stepper control.
- Product B: 3.8″ HMI, 10 inputs, 7 relays, high-speed 100 kHz I/O, encoder support.
- Product C: 3.8″ HMI with built-in analog 2AD/2DA, NTC temperature probes, encoder I/O.
- Product D: 4″ HMI with 12 inputs, 8 relays, analog I/O, dual 100 kHz high-speed channels.
- Product E: 7″ HMI with PLC, MODBUS support, 12 inputs, 8 relays, general-purpose I/O.
Below are five carefully selected products that align with common automation needs. Each section describes who benefits most, why it was selected, and practical cautions to consider before purchase.
2.8-Inch All-In-One PLC With HMI and High-Speed Outputs
This model combines a compact 2.8-inch HMI with a 7-input, 5-relay PLC and 4 transistor outputs. Its high-speed 100 kHz pulse capability supports two servo or stepper motors, making it ideal for small automated machines. It is best for designers building compact control panels where space is at a premium and servo timing matters.
Best for: Small machines, hobbyists, and compact line automation where quick servo drive integration is needed.
Why selected: It offers servo/stepper pulse outputs in a tiny footprint with straightforward GX Workers 2 or Developer programming options, and a dedicated HMI path via YKBuilder. The included 24V pulse capability suits standard industrial I/O.
Caution: The HMI software requires separate access and may have language limitations; ensure you can obtain the needed video instructions and guidelines before deployment.
3.8-Inch PLC HMI With Twelve Inputs and Encoder Support
This unit combines 3.8″ HMI functionality with 10 inputs and 7 relays, plus high-speed outputs for two servos or steppers. It includes 2 high-speed inputs for encoder feedback and built-in 2AD/2DA. It’s well-suited for small-to-medium automation projects where encoder feedback and analog control are needed in a single package.
Best for: Applications requiring encoder feedback and lightweight analog control in one panel.
Why selected: Encoder inputs and built-in analog channels reduce wiring and separate modules, simplifying panel design. Programmability via common ladder logic and SFC is straightforward for experienced users.
Caution: The hobbyist audience should verify the availability of language-specific manuals and ensure the recommended HMI software version is compatible with their setup.
4-Inch HMI PLC With Built-In Analog I/O
This 4-inch package offers 12 inputs and 8 relays, plus built-in analog I/O (2AD/2DA) and temperature sensing with 2 NTC10K probes. It also supports 100 kHz high-speed control for two servos or steppers. This is an attractive choice for slightly larger panels needing analog control and temperature sensing embedded in the PLC.
Best for: Mid-size machines that require analog input/output and temperature monitoring in the same unit.
Why selected: The analog channels and temperature sensing simplify environmental control in manufacturing setups and reduce separate module costs.
Caution: Pulse voltage is 5V for the 4-inch model; ensure your drive electronics are compatible with this level to avoid signal integrity issues.
7-Inch HMI PLC With MODBUS and Relay Outputs
This 7-inch panel pairs an HMI with PLC capabilities and a MODBUS interface, featuring 12 inputs and 8 relays. It is well-suited for machines requiring larger display real estate for operator interaction coupled with robust I/O and remote communication.
Best for: Processes needing a user-friendly touchscreen for monitoring and control with straightforward external device communication via MODBUS.
Why selected: The bigger display enhances operator visibility and interaction, while the built-in PLC features support standard automation tasks without extra hardware.
Caution: The product listing emphasizes display and PLC features; verify compatibility with your existing MODBUS network and any required software updates prior to purchase.
7-Inch PLC HMI With Compact I/O
This model offers 6 inputs and 5 relays with 2 transistor outputs for high-speed pulse and direction control. It also includes 2 A/D channels and built-in HMI software. It’s a compact choice for medium-duty automation where multiple servo drives require clean wiring and a single control unit.
Best for: Budget-conscious projects needing a compact all-in-one solution with decent I/O and analog capability.
Why selected: It reduces cabling and simplifies installation in small cabinets while still supporting essential servo control tasks.
Caution: Ensure the 5V pulse level is compatible with your actuators, and confirm software availability for your language and development environment.
Buying Guide: Key Considerations for All-In-One PLCs
What should you check before buying an all-in-one PLC with HMI?
- Processing and memory: Assess the PLC’s processing speed and memory for your ladder logic, SFC, and HMI screen updates.
- I/O count and type: Confirm the mix of inputs, relays, transistor outputs, analog I/O, and encoder support aligns with your wiring plan.
- High-speed I/O: If you need precise servo or stepper control, verify 100 kHz I/O support and encoder channels.
- HMI size and usability: Choose a display size appropriate for operator interaction and ensure the HMI software is accessible and familiar to your team.
- Programming tools: Check compatibility of GX Workers 2 or Developer, Ladder Diagram, and SFC support with your engineering workflow and language.
- Power and signal levels: Note pulse voltage (5V vs 24V) and power supply requirements to avoid damage to I/O devices.
- Connectivity and remote control: Look for features like MODBUS or other fieldbus protocols for integration with existing equipment.
- Documentation and language: Ensure manuals and software guides are available in your preferred language and ready for deployment.
- Physical form factor: Consider panel space, mounting method, and environmental ratings for your control cabinet.
FAQ
- What is an all-in-one PLC?
It is a single device that combines PLC logic, HMI display, and multiple I/O in one enclosure for streamlined control.” - Do these units support encoder feedback?
Yes, several models include high-speed encoder inputs (100 kHz) for servo or stepper control. - Is 7-inch HMI a better choice than 4-inch for operators?
For operator-heavy environments, a larger screen improves readability and interaction; for compact panels, 4-inch may suffice. - What programming tools are commonly used?
GX Workers 2 or GX Developer with Ladder Diagram and SFC support are common options across these devices. - What should I verify about power levels?
Some models use 24V pulses, others use 5V. Match I/O signal levels to your drives and sensors to avoid damage.