Allen-Bradley 1747-L511 Analog Output Module

Allen-Bradley 1747-L511 is a SLC 5/01 CPU processor for the SLC 500 modular controller family, delivering 1K of user memory and DH-485 communications to run compact control programs for digital and analog I/O on the backplane, making it a staple for mid-1990s to early-2000s automation setups. As the CPU, it supports up to 960 total I/O addresses and up to 480 local analog I/O points, enabling a mix of digital and analog channels across the local I/O chassis; compatibility with a wide range of 1747-series I/O modules facilitates flexible control layouts. The unit provides EEPROM backup memory and battery-backed RAM to retain programs and data in the event of brief power interruptions, supporting non-volatile storage for critical logic and configuration. In typical SLC 500 installations, the 1747-L511 interfaces with multiple I/O modules across up to three local chassis, with as many as 30 module slots in the local backplane, all within the 1747-style backplane ecosystem.