Procure now the 2080-LC70-24QBB, the high-capacity flagship of the Allen-Bradley Micro800 series. Designed for the most demanding standalone machine applications, this Micro870 controller provides double the memory and double the expansion capability of standard micro-controllers.
What Is the 2080-LC70-24QBB?
The 2080-LC70-24QBB is a premium 24-point programmable logic controller featuring 14 digital inputs and 10 digital sourcing (PNP) transistor outputs. As the pinnacle of the Micro800 line, the Micro870 is engineered for applications that exceed the memory limits of the Micro850. It features 20 KB of user data memory and supports up to 20,000 steps, making it capable of executing complex algorithms and large recipe management tasks. Its architecture is uniquely expandable, supporting up to eight 2085-series expansion I/O modules—double the capacity of the Micro850. With an integrated Ethernet port for EtherNet/IP and Modbus TCP, a built-in USB 2.0 port for programming, and a non-isolated serial port, the 2080-LC70-24QBB is the ultimate controller for OEMs who need high performance in a compact, cost-effective form factor.
Key Technical Specifications
- Digital Inputs: 14 (24V DC Sinking/Sourcing)
- Digital Outputs: 10 (24V DC Sourcing/Transistor)
- High-Speed I/O: 2 HSC inputs and 2 PTO outputs (up to 100 kHz)
- Total On-board I/O: 24 Points
- Communication: Integrated Ethernet, USB 2.0, RS232/RS485 Serial
- Expansion Capability: Supports 8 Expansion I/O and 3 Plug-ins
- Memory: 20,000 steps (280 KB total)
- Software: Connected Components Workbench (CCW)
Unrivaled Expansion and Performance Architecture
The 2080-LC70-24QBB architecture is designed for scalability and high-uptime environments. By supporting eight 2085 expansion modules, this single controller can reach up to 304 digital I/O points, rivaling the capacity of many mid-range PLCs. The sourcing transistor outputs are designed for high-frequency switching and support Pulse Train Output (PTO) for precision motion control. The integrated microSD card slot facilitates data logging and easy project transfer. This controller is the preferred choice for sophisticated material handling, high-speed labeling, and complex process skids where a high point count and deep memory are required without the cost of a full Logix rack.
Expert Tips
When utilizing the full expansion capacity of the 2080-LC70-24QBB (8 modules), you must use an external power supply for the expansion bus. The controller’s internal 24V supply is sufficient for the base unit, but the expansion bus requires a 2085-PSAC or 2085-PSDC power supply to ensure stable I/O operation. For the best network performance, utilize the Ethernet port for real-time control (Class 1 messaging) while using the serial port for non-critical legacy Modbus device integration. Always use shielded cables for the PTO signals to maintain axis accuracy in noisy industrial environments.
Frequently Asked Questions
Q: Can the 2080-LC70-24QBB be used for coordinated multi-axis motion?
A: Yes, it supports up to two 100 kHz PTO outputs, enabling high-precision control of two independent servo or stepper axes using standard motion instructions in CCW.
Q: What is the main advantage of the Micro870 over the Micro850?
A: The Micro870 (2080-LC70) provides twice the memory for programs and supports double the number of 2085 expansion I/O modules (8 instead of 4).
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