SM35-J-R20 Unitronics Samba 3.5" colour touchscreen HMI and PLC with onboard I/O configurations

Why Choose the Unitronics SM35-J-R20 PLC with Touchscreen HMI?

The Unitronics SM35-J-R20 is a compact PLC with integrated colour touchscreen HMI from the Unitronics Samba series, designed for efficient automation control in small machines and industrial equipment. Combining a programmable logic controller with a 3.5-inch full-colour touchscreen display, the device allows operators to monitor processes, adjust parameters and control equipment directly from the panel interface.

Powered by a 24 V DC supply, the controller integrates multiple digital and analogue inputs together with relay outputs, enabling direct connection to sensors, switches and actuators without additional expansion modules. The Samba platform also supports ladder logic programming and HMI design within a single development environment, simplifying machine automation projects.

With its integrated HMI, built-in I/O and optional communication modules, the SM35-J-R20 provides a flexible and cost-effective solution for OEM machine builders and automation engineers seeking a compact PLC controller with advanced user interface capabilities.

Key Advantages

• PLC and colour HMI combined into a single compact device.
• 3.5-inch colour touchscreen for intuitive operator control.
• Integrated digital and analogue I/O for direct machine connectivity.
• Supports Modbus communication and industrial networking.
• Low total cost of ownership with licence-free programming software.
• Compact design ideal for OEM machines and control panels.

Key Features

• Samba series PLC with built-in colour touchscreen HMI.
• 3.5″ TFT colour touchscreen display.
• 10 digital inputs plus 2 configurable digital/analogue inputs.
• 8 relay outputs for switching loads.
• High-speed counter / encoder input capability.
• Mini-USB programming port.
• Optional communication modules including Ethernet, RS-232, RS-485 and CANbus.
• Integrated real-time clock and data tables.

Technical Specifications

• Manufacturer: Unitronics
• Series: Samba PLC + HMI
• Model: SM35-J-R20
• Display: 3.5″ TFT colour touchscreen
• Power supply: 24 V DC (20.4–28.8 V range)
• Digital inputs: 10
• Digital / analogue inputs: 2 configurable
• Relay outputs: 8 SPST relay outputs
• High-speed inputs: 1 high-speed counter / encoder input
• Communication: RS-232 onboard, optional RS-485, CANbus or Ethernet
• Programming software: Unitronics VisiLogic / Samba configuration tools
• Operating temperature: approx. 0 °C to 50 °C
• Protection rating: IP65 / NEMA4X front panel when panel mounted

Compact PLC and HMI Automation Control

The Unitronics Samba PLC series integrates control logic and operator interface into a single platform, enabling engineers to design machine automation systems with fewer components and simplified wiring. The built-in touchscreen allows operators to view data, alarms and process variables directly on the controller without requiring a separate HMI panel.

Typical Applications

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

Trusted by Automation Engineers

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