Unitronics M91-2-UA2 Micro PLC with integrated text HMI, featuring 10 digital inputs, configurable analogue and thermocouple inputs, 10 transistor outputs, 2 analogue outputs and RS232/RS485 communications.
£700.00
The Unitronics M91-2-UA2 is a highly capable Micro PLC with integrated text-based HMI, designed for industrial automation applications requiring digital control, analogue processing, temperature monitoring and analogue output functionality within a single compact controller. As part of the proven Unitronics M91 series, it combines PLC control, operator interface capabilities and onboard I/O, helping reduce panel space, wiring complexity and installation costs.
Featuring a built-in 2-line, 16-character LCD display and a robust 15-key keypad, the M91-2-UA2 enables operators to monitor processes, adjust operating parameters and perform diagnostics directly from the controller. This integrated design eliminates the need for a separate HMI while maintaining a simple and cost-effective automation platform.
With 10 digital inputs, 2 configurable analogue/temperature inputs, 10 transistor outputs and 2 analogue outputs, the M91-2-UA2 is ideally suited to process automation, temperature control, OEM machinery, water treatment systems and industrial monitoring applications. The controller also supports PID control, MODBUS communications and local I/O expansion for enhanced flexibility.
The Unitronics M91-2-UA2 is specifically designed for applications requiring both measurement and control functions. Its configurable analogue inputs can be used for standard process signals or thermocouple temperature monitoring, while the integrated analogue outputs allow direct control of drives, valves, actuators and process equipment.
Combined with PID control, transistor outputs and communication capabilities, the controller delivers a complete automation platform for industrial systems. The integrated display and keypad provide local monitoring and control without requiring additional operator interface hardware.
| IP Rating | IP65 |
|---|---|
| Series | M91 |
| Product type | Micro PLC with integrated HMI |
| Power supply | 24 V DC nominal |
| Operating voltage | 20.4 to 28.8 V DC |
| Digital inputs | 10 |
| Analogue / temperature inputs | 2 configurable inputs |
| Thermocouple support | Types B, E, J, K, N, R, S, T |
| Digital outputs | 10 transistor outputs |
| Analogue outputs | 2 |
| PWM outputs | 2 |
| High-speed counter | 1 × 10 kHz, 32-bit |
| Display | STN LCD, 2 lines × 16 characters |
| Keypad | 15 keys |
| Communication ports | RS232 / RS485 |
| Protocol support | MODBUS RTU, OPC |
| Program memory | 36 KB virtual ladder memory |
| Database capacity | 1024 integers |
| Protection rating | IP65 / NEMA 4X when panel mounted |
| Operating temperature | 0°C to 50°C |
| Mounting type | Panel or DIN rail mounting |
The M91-2-UA2 is used for industrial automation applications requiring machine control, analogue processing, temperature monitoring and analogue output control.
Yes. The configurable analogue inputs support multiple thermocouple types including J, K, T, E, N, R, S and B.
The controller provides 10 transistor outputs and 2 analogue outputs for machine and process control applications.
Yes. The controller includes auto-tune PID functionality supporting up to four independent control loops.
Yes. The M91-2-UA2 supports local I/O expansion modules and can be expanded up to approximately 150 I/O points depending on system requirements.
Unitronics M91 Micro-OPLC controllers are widely used across industrial automation, utilities, OEM machinery and process control sectors, delivering reliable PLC functionality, integrated operator interaction and flexible control capabilities within a compact platform.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...