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 Integrated Touchscreen HMI?

The Unitronics SM43-J-R20 is a compact and powerful PLC with integrated colour touchscreen HMI designed for machine control, process automation and OEM applications. Part of the highly successful Unitronics Samba series, it combines a programmable logic controller, operator interface and onboard I/O into a single device, reducing hardware requirements, simplifying installation and lowering overall project costs.

Developed for machine builders, panel manufacturers and automation engineers, the SM43-J-R20 delivers reliable control functionality alongside a vibrant 4.3-inch colour touchscreen display. Its all-in-one architecture enables both PLC programming and HMI development within a single software environment, helping to streamline commissioning and maintenance.

Featuring 12 digital inputs, configurable analogue input capability and 8 relay outputs, the SM43-J-R20 is ideally suited for packaging machinery, conveyor systems, HVAC equipment, pumping stations and industrial process control applications. The controller operates from a 24 VDC power supply and supports a wide range of communication options through optional expansion modules.

Key Advantages

• Integrated PLC and colour touchscreen HMI in one compact platform.
• 4.3-inch TFT colour touchscreen display.
• 12 digital inputs and 8 relay outputs.
• Configurable analogue input capability.
• Reduces panel space requirements and wiring complexity.
• Supports Ethernet, RS232, RS485 and CANbus expansion options.
• Ideal for machine builders, OEMs and industrial automation projects.

Key Features

• Unitronics Samba PLC + HMI platform.
• 4.3-inch TFT full-colour touchscreen display.
• 480 × 272 pixel resolution.
• 12 digital inputs.
• Up to 2 configurable analogue inputs.
• 8 relay outputs.
• Integrated USB programming port.
• Real-time clock with battery backup.
• MODBUS communication support.
• Programming via Unitronics VisiLogic software.

Technical Specifications

• Manufacturer: Unitronics
• Series: Samba PLC + HMI
• Model: SM43-J-R20
• Product type: PLC with integrated touchscreen HMI
• Supply voltage: 24 VDC
• Operating voltage range: 20.4 to 28.8 VDC
• Display size: 4.3-inch TFT colour touchscreen
• Display resolution: 480 × 272 pixels
• Digital inputs: 12
• Analogue inputs: Up to 2 configurable inputs
• Relay outputs: 8
• High-speed counter input: 1
• Communication: USB, RS232, optional Ethernet, RS485 and CANbus
• Protection rating: IP66 / NEMA 4X front panel
• Operating temperature: 0°C to 50°C
• Dimensions (H × W × D): 136 × 105.1 × 61.3 mm
• Battery backup: Approximately 7 years typical

Powerful Automation with Integrated Operator Interface

The SM43-J-R20 combines machine control and operator interface functionality within a single compact platform. This integrated design reduces hardware costs, simplifies panel design and provides operators with intuitive touchscreen access to machine functions, alarms and process data.

Using Unitronics VisiLogic software, engineers can create PLC logic and HMI applications within one development environment. Advanced functionality includes data logging, recipe management, alarms, PID control, remote access and communication with industrial networks, making the controller suitable for a broad range of automation projects.

Typical Applications

• Packaging and labelling machinery.
• Material handling and conveyor systems.
• HVAC and building automation.
• Pumps and water treatment equipment.
• Food and beverage processing machinery.
• Industrial process control systems.
• OEM machine automation projects.

Trusted by Automation Engineers Worldwide

Unitronics Samba PLCs are widely used by OEMs, machine builders and industrial automation professionals who require reliable control, integrated touchscreen operation and flexible communications in a compact controller platform.