USC-B3-R20 Unitronics Unistream PLC with 10 digital/2 analog inputs and 8 relay outputs with Unicloud included

Why Choose the Unitronics USC-C3-R20 UniStream Cloud PLC?

The Unitronics USC-C3-R20 is a compact DIN-rail mounted Programmable Logic Controller (PLC) designed for industrial automation, machine control and cloud-connected monitoring applications. As part of the advanced UniStream Cloud series, it combines a high-performance PLC CPU, integrated I/O and built-in UniCloud connectivity, providing a powerful solution for modern Industry 4.0 environments.

Designed for OEM machine builders, control panel manufacturers and automation engineers, the USC-C3-R20 simplifies automation system architecture by integrating control, communication and cloud access into a single device. Built-in networking, remote diagnostics and secure cloud connectivity help improve operational visibility while reducing engineering complexity and hardware requirements.

With 10 digital inputs, 2 analogue inputs and 8 isolated relay outputs, the USC-C3-R20 is ideal for industrial machinery, utilities, process control systems, building automation and remote monitoring applications. Its compact DIN-rail mounting design allows straightforward installation within industrial control cabinets.

Key Advantages

• Compact DIN-rail mounted PLC with integrated I/O.
• Built-in UniCloud connectivity for IIoT and remote monitoring.
• 10 digital inputs, 2 analogue inputs and 8 relay outputs.
• Dual Ethernet ports for industrial networking applications.
• Supports remote I/O expansion and Uni-COM communication modules.
• Integrated alarm management, data logging and remote diagnostics.
• Reduces system complexity and overall hardware costs.

Key Features

• Unitronics UniStream Cloud series.
• 10 isolated 24 V DC digital inputs.
• 2 analogue inputs (0-10 V / 0-20 mA / 4-20 mA, 12-bit).
• 8 isolated SPST-NO relay outputs.
• Integrated UniCloud functionality with cloud-ready operation.
• 2 Ethernet ports (10/100 Base-T).
• USB Host and USB Device connectivity.
• Supports MQTT, Modbus TCP, EtherNet/IP, SQL, FTP and Web Server functionality.
• Remote I/O and Uni-COM expansion support.
• Supports Virtual HMI and VNC remote access.
• Advanced data logging and alarm management capabilities.

Technical Specifications

• Manufacturer: Unitronics
• Series: UniStream Cloud
• Model: USC-C3-R20
• Product type: PLC controller with integrated I/O
• Supply voltage: 24 V DC
• Operating voltage range: 20.4 to 28.8 V DC
• Digital inputs: 10 isolated sink/source inputs
• Analogue inputs: 2 x 0-10 V / 0-20 mA / 4-20 mA, 12-bit
• Relay outputs: 8 x isolated SPST-NO relay outputs
• Ethernet ports: 2 x RJ45 10/100 Base-T
• USB ports: USB Host and USB Device
• Memory: 256 MB RAM, 3 GB system memory, 1 GB user memory
• Protection rating: IP20
• Mounting type: DIN-rail mounting
• Operating temperature: -20°C to +55°C
• Battery: CR2032 lithium backup battery
• Dimensions (H × W × D): approx. 123.2 × 121 × 63.9 mm

Built-In Cloud Connectivity for Smart Manufacturing

The USC-C3-R20 combines industrial control and remote monitoring capabilities within a single compact controller. Integrated UniCloud functionality allows users to access machine data, alarms and performance information remotely without requiring separate gateways or cloud infrastructure.

Advanced communication features including MQTT, SQL connectivity, web server functionality, VNC remote access and industrial protocol support make the USC-C3-R20 suitable for both standalone equipment and larger automation systems requiring secure connectivity and data transparency.

Typical Applications

• Industrial machinery and OEM equipment.
• Material handling and conveyor systems.
• Water and wastewater treatment facilities.
• Building automation and energy management.
• Factory automation and process control.
• Remote monitoring and telemetry systems.
• Utilities and infrastructure applications.
• Industry 4.0 and IIoT deployments.

Trusted by Automation Engineers Worldwide

Unitronics UniStream Cloud PLCs are trusted by machine builders, OEM manufacturers and automation professionals seeking reliable industrial control, integrated cloud connectivity and scalable automation solutions for modern production environments.