SM43-J-T20 Unitronics Samba 4.3" colour touchscreen HMI and PLC with onboard I/O configurations

Why Choose the Unitronics SM43-J-T20 PLC with Touchscreen HMI?

The Unitronics SM43-J-T20 is a compact PLC with integrated colour touchscreen HMI from the Unitronics Samba series. Designed for modern industrial automation systems, the controller combines programmable logic control, operator interface and onboard I/O within a single device, helping reduce wiring complexity and control panel size.

Featuring a 4.3-inch TFT colour touchscreen, the controller allows operators to monitor machine status, adjust parameters and control processes directly from the panel. With integrated digital and analogue inputs together with fast transistor outputs, the SM43-J-T20 provides flexible connectivity for sensors, actuators and automation equipment.

Powered by a 24 V DC supply, the controller supports ladder logic programming and HMI configuration within Unitronics’ development environment. This makes it an efficient and cost-effective solution for OEM machinery, industrial automation systems and compact control panels.

Key Advantages

• PLC and touchscreen HMI combined in a single compact controller.
• 4.3″ colour TFT touchscreen display for intuitive operator interaction.
• Integrated digital and analogue inputs for direct sensor connectivity.
• Transistor outputs suitable for high-speed switching applications.
• Supports industrial communication protocols including Modbus.
• Compact design ideal for OEM machines and automation panels.

Key Features

• Samba series PLC with integrated colour touchscreen HMI.
• 4.3″ TFT LCD display with resistive touchscreen interface.
• 12 digital inputs including high-speed counter / encoder capability.
• 2 analogue inputs configurable for process signals.
• 8 transistor outputs suitable for fast switching and PWM control.
• Mini-USB programming port.
• Optional communication modules including Ethernet, RS-485 and CANbus.
• Real-time clock with battery backup and data logging capability.

Technical Specifications

• Manufacturer: Unitronics
• Series: Samba PLC + HMI
• Model: SM43-J-T20
• Display: 4.3″ colour TFT touchscreen
• Resolution: 320 × 240 pixels
• Power supply: 24 V DC (20.4–28.8 V operating range)
• Digital inputs: 12 inputs including high-speed counter capability
• Analogue inputs: 2 configurable inputs
• Digital outputs: 8 transistor outputs
• High-speed inputs: up to 3 HSC / shaft-encoder inputs
• Communication: RS-232 and USB programming port with optional Ethernet, RS-485 or CANbus modules
• Operating temperature: 0 °C to 50 °C
• Protection rating: IP65 / IP66 / NEMA 4X front panel when panel mounted

Integrated PLC and HMI Automation Platform

The Unitronics Samba PLC family integrates programmable logic control and operator interface functionality into a single compact controller. This architecture simplifies machine automation while providing advanced monitoring features including alarms, data logging, PID control and communication capabilities.

Typical Applications

• OEM machine automation systems.
• Packaging and assembly equipment.
• HVAC and pump control systems.
• Conveyor and material handling machinery.
• Industrial process monitoring and control.

Trusted by Automation Engineers

Unitronics Samba PLC controllers are widely used by machine builders and system integrators for compact automation solutions with integrated touchscreen interfaces.