SM35-J-T20 Unitronics Samba 3.5" colour touchscreen HMI and PLC with onboard I/O configurations

Why Choose the Unitronics SM35-J-T20 PLC with Touchscreen HMI?

The Unitronics SM35-J-T20 is a compact PLC with integrated colour touchscreen HMI from the Unitronics Samba series. Designed for machine builders and industrial automation engineers, the controller combines programmable logic control, operator interface and onboard I/O in a single device to simplify panel design and reduce wiring complexity.

The controller features a 3.5-inch TFT colour touchscreen with intuitive operator control and monitoring capabilities. Integrated digital and analogue inputs along with transistor outputs allow direct connection to sensors, switches and actuators, making it ideal for compact machine automation and industrial control systems.

Powered by a 24 V DC supply, the SM35-J-T20 supports ladder logic programming and HMI development within Unitronics’ integrated development environment, allowing engineers to design both control logic and operator screens in a single software platform.

Key Advantages

• PLC and colour touchscreen HMI integrated into one compact controller.
• 3.5″ full-colour touchscreen display for intuitive operator control.
• Integrated digital and analogue inputs for direct sensor connectivity.
• Transistor outputs suitable for fast switching control.
• Supports industrial communication protocols and expansion modules.
• Compact design ideal for OEM machines and automation panels.

Key Features

• Samba series PLC with built-in colour touchscreen HMI.
• 3.5″ TFT LCD touchscreen with 320 × 240 resolution.
• 12 digital inputs including high-speed counter capability.
• 2 analogue inputs configurable for 0–10 V or 4–20 mA signals.
• 8 transistor outputs with PWM capability.
• RS-232 communication port with optional Ethernet, CANbus or RS-485 modules.
• Real-time clock and data logging capability.
• Panel-mounted design with sealed front interface.

Technical Specifications

• Manufacturer: Unitronics
• Series: Samba PLC + HMI
• Model: SM35-J-T20
• Display: 3.5″ TFT colour touchscreen (320 × 240 resolution)
• Power supply: 24 V DC (20.4–28.8 V range)
• Digital inputs: 12 inputs (including high-speed counter / encoder inputs)
• Analogue inputs: 2 configurable inputs
• Transistor outputs: 8 PNP outputs
• Communication: RS-232 onboard with optional RS-485, Ethernet or CANbus modules
• Application memory: approx. 80 kB
• Operating temperature: 0 °C to 50 °C
• Protection rating: IP65 / IP66 / NEMA 4X front panel when panel mounted

Compact PLC and HMI Automation Platform

The Samba PLC series integrates control logic, operator interface and communication capabilities into a single platform. This architecture simplifies machine automation by reducing component count while enabling efficient monitoring, control and data handling within industrial environments.

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 operator interfaces.