Get now the 2080-LC20-20QWB, a versatile 20-point Micro820 controller from Allen-Bradley featuring electromechanical relay outputs. This PLC is the ideal choice for applications requiring the switching of high-current AC/DC loads in a compact and networked industrial environment.
What Is the 2080-LC20-20QWB?
The 2080-LC20-20QWB is a high-performance programmable logic controller specifically designed for small-scale automation and remote monitoring. It features 12 digital inputs and 7 relay outputs, providing a robust interface for diverse industrial actuators. The relay outputs allow for the direct control of devices like motor contactors and solenoid valves without the need for interposing relays. This controller also includes one analog output (0-10V) and four inputs that can be configured as 0-10V analog inputs. Connectivity is a core strength of the 2080-LC20-20QWB, as it comes equipped with an Ethernet port for remote access and a serial port for Modbus communication. Its modular design supports up to two plug-in modules, making it a flexible platform for machine builders who need to scale I/O or add specialized communication protocols like RS485.
Key Technical Specifications
- Total I/O: 20 Points
- Digital Inputs: 12 (24V DC Sinking/Sourcing)
- Relay Outputs: 7 (Electromechanical, 2A per channel)
- Analog I/O: 1 Analog Output (0-10V), 4 Configurable Analog Inputs (0-10V)
- Communication: 10/100 Ethernet, RS232/RS485 Serial
- Storage: MicroSD card slot for data logging and recipes
- Power Supply: 24V DC Input
- Mounting: DIN rail or panel mount
Advanced Architecture and Field Management
The 2080-LC20-20QWB architecture prioritizes ease of use and maintenance. With its built-in real-time clock (RTC), the controller can manage time-based automation tasks with high precision. The microSD slot facilitates rapid project cloning and firmware updates, while the Ethernet port supports standard industrial protocols, allowing the PLC to integrate with HMI panels like the PanelView 800. The relay outputs provide galvanic isolation between the PLC logic and the field-side loads, enhancing the overall system’s electrical resilience. This makes it a preferred solution for building automation, material handling, and small-scale wastewater treatment facilities where mixed AC/DC signals are common.
Maintenance Tips
For the 2080-LC20-20QWB, the primary maintenance focus should be on the relay outputs. Since these are mechanical components, they have a limited cycle life; avoid high-frequency switching and always use external surge suppression for inductive loads to prevent contact pitting. Periodically backup your program and data logs to a microSD card. Ensure that the serial port wiring is properly shielded and grounded to prevent communication errors in Modbus networks, especially in areas with significant electromagnetic interference from nearby drives.
Frequently Asked Questions
Q: What is the maximum current for the relay outputs?
A: Each relay output on the 2080-LC20-20QWB is rated for up to 2 Amps at 240V AC or 30V DC, making them suitable for most standard industrial loads.
Q: Can I use this controller to log data from analog sensors?
A: Yes, using the four configurable analog inputs and the microSD card slot, the 2080-LC20-20QWB is an excellent choice for local data logging and historical analysis.
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