ControlLogix

ControlLogix is Allen-Bradley's flagship Bulletin 1756 programmable automation controller (PAC) family, spanning the 5570, 5580, and 5590 series and encompassing controllers, chassis accessories, power supplies, and supporting hardware across more than 345 catalog numbers. Decoding a part number starts with the controller series suffix: -L7x designates the 5570 series, -L8x the 5580, and -L9x the 5590. The digit following the series letter indicates the memory tier — for example, L81 through L85 step from 3 MB to 40 MB within the 5580 family. A trailing E denotes embedded Ethernet on 5580 controllers, while TS on 5590 models signals dual Ethernet plus USB-C. Safety variants carry S, ES, or SP suffixes for GuardLogix configurations, and harsh-environment builds append K (conformal coat) or XT (extended temperature plus conformal). Accessories in this family include energy storage modules (1756-ESMCAP), lithium battery assemblies (1756-BA1 at 1800 mAh, 1756-BA2 at 1200 mAh), redundant power supply assemblies (1756-PAR2K), and fiber optic redundancy cables in 1 m, 3 m, and 10 m lengths. Full specifications are available in the ControlLogix Technical Data (1756-TD001).