Allen-Bradley 1756-L71 ControlLogix 2 MB Controller

Description

The Allen-Bradley 1756-L71 ControlLogix 2 MB Controller is a programmable automation controller designed for complex industrial automation applications, including manufacturing, energy, transportation, and water treatment systems. Powered by the Logix5571 processor with a 500MHz clock speed, it delivers high-speed data processing and robust computing performance to execute complex control algorithms and logic with fast, accurate system response. It features 2MB of standard user memory (expandable to 32MB) and 0.98MB of I/O memory, plus a standard 1GB non-volatile Secure Digital (SD) memory card (1784-SD1) that can be upgraded to 2GB via the 1784-SD2 card to prevent data loss from power failures or faults. The controller supports up to 128,000 discrete I/O signals and 4,000 analog I/O signals, and comes with three energy storage capacitors (two removable) to maintain operation during power outages. It includes a 1-port USB 2.0 programming/download interface and supports multiple industrial communication protocols, such as EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O, and Synch Link, as well as third-party process and device networks. A built-in 4-character alphanumeric display enables easy monitoring of runtime status, module information, and controller diagnostics. Technical specifications include a power draw of 5mA @ 1.2V DC and 800mA @ 5.1V DC, 30V continuous isolation voltage, 2.5W maximum power consumption, and 8.5 BTU/hour heat dissipation, with dimensions of 5.461 (height) x 18.161 (width) x 23.749 (length) and a weight of 0.37kg.