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

Why Choose the Unitronics USC-B3-R20 UniStream PLC?

The Unitronics USC-B3-R20 is a compact and powerful UniStream® programmable logic controller (PLC) designed for industrial automation, machine control and process applications. Combining advanced control functionality with integrated I/O and Ethernet communications, the USC-B3-R20 provides a flexible and cost-effective solution for OEMs, panel builders and automation engineers.

Part of the Unitronics UniStream Basic Series, this DIN rail mounted PLC features integrated digital and analogue inputs alongside relay outputs, enabling the controller to manage a wide range of industrial devices and processes. The built-in networking capabilities support modern automation architectures while simplifying system design and installation.

With 10 digital inputs, 2 analogue inputs, 8 relay outputs, dual Ethernet ports and UniCloud connectivity support, the USC-B3-R20 delivers reliable performance for machine automation, process control and industrial monitoring applications.

Key Advantages

• Compact UniStream PLC with integrated I/O.
• 10 digital inputs and 8 relay outputs.
• 2 analogue inputs supporting voltage and current signals.
• Dual Ethernet ports for industrial networking.
• Built-in support for UniCloud connectivity.
• DIN rail mounting for simple control panel installation.

Key Features

• Unitronics UniStream Basic PLC.
• 10 isolated digital inputs.
• 2 analogue inputs (0-10 V / 0-20 mA).
• 8 isolated relay outputs.
• 2 × Ethernet 10/100 Base-T ports.
• USB host connection.
• 256 MB RAM and 1 GB user memory.
• Virtual HMI capability.
• Remote I/O expansion support.
• 24 V DC operation.

Technical Specifications

• Manufacturer: Unitronics
• Series: UniStream Basic
• Model: USC-B3-R20
• Product type: Programmable Logic Controller (PLC)
• Supply voltage: 24 V DC
• Operating voltage range: 20.4 to 28.8 V DC
• Digital inputs: 10 × 24 V DC sink/source
• Analogue inputs: 2 × 0-10 V / 0-20 mA
• Analogue resolution: 12-bit
• Digital outputs: 8 × relay outputs
• Relay type: Isolated relay outputs
• Ethernet ports: 2 × RJ45 10/100 Base-T
• USB host ports: 1 × USB Type-A
• RAM: 256 MB
• User memory: 1 GB
• System memory: 3 GB
• Ladder memory: 1 MB
• Mounting type: DIN rail
• Protection rating: IP20
• Operating temperature: -20°C to +55°C

Advanced Control for Modern Automation Systems

The USC-B3-R20 is designed to provide reliable automation control while reducing the need for additional hardware. Its integrated I/O configuration simplifies installation and lowers system costs, making it ideal for compact control cabinets and machine automation projects.

Dual Ethernet ports support industrial networking and remote connectivity, while UniCloud integration enables remote monitoring and IIoT functionality. The relay outputs make the controller particularly suitable for switching industrial loads, contactors, solenoids and other field devices.

Typical Applications

• Industrial machine control.
• OEM equipment automation.
• Packaging machinery.
• Material handling systems.
• Process control applications.
• Building automation systems.
• Water and wastewater treatment.
• Remote monitoring and IIoT projects.

Trusted for Industrial Automation

Unitronics UniStream PLCs are trusted by automation engineers and machine builders worldwide for their integrated I/O, advanced communications capabilities and reliable performance across a wide range of industrial applications.