SM43-J-RA22 Unitronics Samba 4.3" colour touchscreen HMI and PLC with onboard I/O configurations

Why Choose the Unitronics SM43-J-RA22 PLC with Touchscreen HMI?

The Unitronics SM43-J-RA22 is a versatile PLC with integrated colour touchscreen HMI from the Unitronics Samba series, designed for compact machine automation and industrial control applications. Combining programmable logic control, a full-colour operator interface and onboard I/O within a single device, the controller simplifies control panel design while reducing wiring and installation time.

The controller features a 4.3-inch TFT colour touchscreen that enables operators to monitor machine status, adjust parameters and control processes directly from the panel interface. Built-in digital, analogue and temperature inputs along with relay and analogue outputs allow direct connection to sensors, switches, valves and actuators without requiring external expansion modules.

Powered by a 24 V DC supply, the SM43-J-RA22 supports ladder logic programming and HMI development within Unitronics’ integrated software environment, providing an efficient and cost-effective automation platform for OEM equipment and industrial machinery.

Key Advantages

• Integrated PLC and touchscreen HMI in a single compact controller.
• 4.3″ colour TFT touchscreen display for intuitive operator interaction.
• Built-in digital, analogue and temperature inputs for flexible automation control.
• Relay outputs for reliable switching of industrial loads.
• Analogue outputs for process control signals.
• Supports industrial communication protocols including Modbus and Ethernet options.

Key Features

• Samba series PLC with integrated colour touchscreen HMI.
• 4.3″ TFT LCD display with 320 × 240 resolution.
• 12 digital inputs including one high-speed counter / encoder input.
• 2 analogue inputs configurable for 0–10 V or 4–20 mA signals.
• 2 PT100 or thermocouple inputs for temperature measurement.
• 8 relay outputs for switching industrial loads.
• 2 analogue outputs for process control signals.
• RS-232 communication port with optional Ethernet, CANbus or RS-485 modules.

Technical Specifications

• Manufacturer: Unitronics
• Series: Samba PLC + HMI
• Model: SM43-J-RA22
• Display: 4.3″ colour touchscreen
• Resolution: 320 × 240 pixels
• Power supply: 24 V DC (20.4–28.8 V range)
• Digital inputs: 12 inputs including high-speed counter capability
• Analogue inputs: 2 process inputs
• Temperature inputs: 2 PT100 / thermocouple inputs
• Digital outputs: 8 relay outputs
• Analogue outputs: 2 outputs (voltage or current)
• Communication: RS-232 onboard with optional RS-485, Ethernet 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 controller range integrates programmable logic control and human-machine interface functionality within a single device. This architecture simplifies machine automation while providing advanced monitoring features including alarms, data logging and process visualisation through the touchscreen interface.

Typical Applications

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