M91-2-T2C Unitronics M91 Textual display and keyboard HMI and PLC onboard I/Os expands up to 150 I/Os

Why Choose the Unitronics M91-2-T2C Micro PLC with Integrated Text HMI?

The Unitronics M91-2-T2C is a compact micro PLC with integrated text-based HMI from the Unitronics M90/M91 series, designed for small and medium industrial automation systems. It combines programmable logic control, operator interface and onboard I/O within a single controller, helping reduce panel space, wiring and overall system cost.

The controller includes a built-in two-line LCD display capable of showing 16 characters per line and a 15-key keypad, enabling operators to monitor machine status, navigate menus and configure parameters directly from the unit. This eliminates the need for a separate HMI panel while still providing effective operator interaction.

The M91-2-T2C provides flexible I/O with 10 digital inputs, 2 configurable digital/analogue inputs and 12 transistor outputs. It also supports RS232, RS485 and CANbus communication, allowing integration with PLC networks, SCADA systems and distributed automation systems.

Key Features

• Integrated PLC and text HMI in a compact automation controller.
• 2-line LCD display with 16 characters per line.
• 10 digital inputs for sensors and automation signals.
• 2 configurable digital / analogue inputs supporting voltage or current signals.
• 12 transistor outputs for controlling actuators and devices.
• High-speed counter capability for encoder or frequency inputs.
• RS232 and RS485 serial communication.
• CANbus networking for distributed automation systems.
• I/O expansion support for additional modules.

Technical Specifications

• Manufacturer: Unitronics
• Series: M90 / M91
• Model: M91-2-T2C
• Controller type: Micro PLC with integrated text HMI
• Display: LCD text display
• Display size: 2 lines × 16 characters
• Keypad: 15 operator keys
• Supply voltage: 12 / 24 V DC
• Digital inputs: 10 inputs
• Configurable inputs: 2 digital or analogue inputs
• Digital outputs: 12 transistor outputs
• High-speed inputs: encoder / counter capable inputs
• Communication ports: RS232 and RS485
• Networking: CANbus support
• Program capacity: approx. 36 kB ladder logic
• Expansion capability: supports I/O expansion modules
• Protection rating: IP65 front panel when panel mounted
• Operating temperature: 0 °C to 50 °C

Typical Applications

• Machine automation and OEM equipment.
• Packaging and material handling systems.
• Water treatment and pump control.
• Industrial process monitoring and control.
• Standalone automation systems requiring local operator interface.

Trusted by Machine Builders

Unitronics M90 and M91 PLCs are widely used in industrial automation because they combine PLC control and operator interface in a compact and cost-effective controller platform suitable for small and medium control systems.