SM43-J-R20 Unitronics Samba 4.3" colour touchscreen HMI and PLC with onboard I/O configurations

Why Choose the Unitronics SM43-J-R20 PLC with Touchscreen HMI?

The Unitronics SM43-J-R20 is a powerful PLC with integrated colour touchscreen HMI from the Unitronics Samba series. Designed for compact machine automation and industrial control systems, the controller combines programmable logic control, operator interface and onboard I/O into a single device, helping reduce wiring complexity and control panel size.

Featuring a 4.3-inch colour TFT touchscreen, the SM43-J-R20 allows operators to monitor process values, configure parameters and control machinery directly from the front panel. The integrated I/O configuration includes digital and analogue inputs together with relay outputs, enabling direct connection to sensors, switches and actuators without requiring external modules.

Powered by a 24 V DC supply, the controller supports ladder logic programming and HMI design within Unitronics’ integrated development environment. This makes it a cost-effective automation platform for OEM machine builders and system integrators.

Key Advantages

• PLC and colour touchscreen HMI integrated into a single compact controller.
• 4.3″ TFT touchscreen display for intuitive operator interaction.
• Integrated digital and analogue inputs for direct sensor connectivity.
• Relay outputs for reliable switching of industrial loads.
• Supports industrial communication protocols including Modbus.
• Compact design ideal for OEM machines and automation panels.

Key Features

• Samba series PLC with built-in colour touchscreen HMI.
• 4.3″ colour TFT LCD display with 320 × 240 resolution.
• 12 digital inputs including high-speed counter capability.
• 2 configurable analogue inputs (0–10 V / 4–20 mA).
• 8 relay outputs for switching loads and actuators.
• Mini-USB programming interface.
• Optional communication modules including Ethernet, RS-485 and CANbus.
• Real-time clock, alarms and data logging support.

Technical Specifications

• Manufacturer: Unitronics
• Series: Samba PLC + HMI
• Model: SM43-J-R20
• Display: 4.3″ TFT 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 / shaft encoder capability
• Analogue inputs: 2 inputs configurable for 0–10 V or 4–20 mA
• Digital outputs: 8 relay outputs
• Relay rating: up to 3 A per output
• 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 PLC family combines programmable logic control and HMI functionality into a single compact controller. This integrated architecture simplifies system design while providing reliable machine control, monitoring and communication capabilities for industrial automation applications.

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.