Allen-Bradley 2080-LC20-20QWB Micro820 20-Point Controller

A brick-style Micro820 with relay outputs

The Allen-Bradley 2080-LC20-20QWB is a Micro820 20-point programmable controller. It is a compact brick-style unit with twelve embedded inputs and eight outputs, an Ethernet port and a serial port, and it accepts up to two plug-in modules for extra I/O, communication or analog functions. It is programmed with Connected Components Workbench software and is aimed at stand-alone machines and small automation tasks.

In the catalog number, Q is the 24V input type, W means relay outputs and B means a 24V DC power supply, following the catalog number key in the Micro800 selection guide. The R versions have removable terminal blocks.

Technical specifications

Inputs, outputs and analog signals

Four of the inputs, I-00 to I-03, are non-isolated 24V DC sink inputs that can also be configured as 0 to 10V analog inputs with 12-bit resolution. The remaining inputs I-04 to I-11 are isolated 24V DC sink/source inputs. The relay outputs are rated 2 A at 240V AC or 24V DC with a mechanical life of 10 million cycles, and there is one 0 to 10V analog output with 12-bit resolution.

Power is 24V DC (20.4 to 26.4V DC, Class 2 or limited voltage and current source). Consumption is 5.62 W without plug-ins and up to 8.5 W with plug-ins. A 10V auxiliary output is provided for a thermistor.

Mounting and environment

The controller is 90 x 104 x 75 mm, weighs 0.38 kg and has an IP20 rating, so it must be installed in a cabinet. It has a DIN rail mounting latch. The operating range is -20 to +65 °C with a T4 North American temperature code. The Micro800 selection guide also lists a remote LCD, the 2080-REMLCD, that connects to the serial port of the Micro820.

Documents and quotation

The Rockwell Automation Micro820 installation instructions are attached. They date from 2014 and describe the original 2080-LC20 family; the current Micro800 selection guide is publication 2080-SG001. See our PLC and I/O cards catalogue for related controllers and I/O. Confirm the exact catalog number, series letter and firmware or hardware revision on the product label, and the compatibility with your existing system, before ordering. Stock and lead time are confirmed at quotation.

How the 2080-LC20-20QWB Works

The 2080-LC20-20QWB runs a user program written in Connected Components Workbench, using ladder diagram, function block diagram or structured text. On each scan the controller reads its embedded inputs and any plug-in modules, executes the program and updates the relay outputs and the analog output. The embedded Ethernet port is used for programming and for communication with HMIs, drives and other devices, and the serial port can connect to devices such as a remote display or serial instruments.

Because four of the inputs can be configured as 0–10 V analog inputs and there is a 0–10 V analog output, a single Micro820 can close a simple control loop, such as a speed reference to a variable-speed drive, without extra modules. The relay outputs switch AC or DC loads directly, making the controller convenient for small panels that mix voltages.

2080-LC20-20QWB Selection & Ordering Guide

• Output type: the W in the catalog number means relay outputs. Other Micro820 20-point versions listed in the installation instructions, such as the 2080-LC20-20QBB, have transistor outputs; choose relays for mixed AC/DC loads and transistors for fast or frequent switching.
• Supply: the B at the end indicates a 24V DC power supply; the 2080-LC20-20AWB version accepts a different input type, so check the input voltage of the field devices.
• Terminal blocks: the R suffix (2080-LC20-20QWBR) provides removable terminal blocks for easier replacement.
• Expansion: plan up to two Micro800 plug-in modules for extra I/O, analog or communication functions, and the optional 2080-REMLCD remote display if an operator display is needed.
• Software: Connected Components Workbench is used for programming; confirm the version required for the controller firmware.

Request a quote with the full catalog number and any plug-ins. Our team can help confirm the correct ordering code.

Installation & Maintenance

Mount the 2080-LC20-20QWB on a DIN rail or panel inside an enclosure, leaving the ventilation clearances given in the installation instructions. Feed it from a 24V DC Class 2 or limited voltage and current supply, fuse the relay output commons to suit the loads, and fit suppression across inductive AC and DC loads to extend relay life. Separate low-level analog wiring from relay and power wiring.

Keep a backup of the program and record the firmware revision. During maintenance, check terminal tightness, look at the status indicators, and replace the controller if relay contacts approach their rated electrical life on frequently switched outputs.

Typical Applications in Oman & the GCC

• Booster pump, lift station and irrigation control panels.
• Simple machine control in packaging, food and building materials plants.
• HVAC equipment, ventilation fans and chiller auxiliaries.
• Small skid packages that need Ethernet connection to an HMI or SCADA system.

Why Source the 2080-LC20-20QWB from Seven Star LLC

Seven Star LLC supplies Allen-Bradley Micro800 controllers, including the 2080-LC20-20QWB, across Oman and the GCC. Request a quote with the catalog number and quantity.