Emerson Electric Co. KL4501X1-BB1 Charm Address Plug

The Emerson KL4501X1-BB1 CHARM Address Plug is a plug-in device for DeltaV electronic marshalling, used to assign and identify CHARM I/O modules and ensure correct slot addressing within DeltaV DCS systems in process plants such as oil & gas, chemical processing, and power generation. It provides I/O module addressing and slot identification in the CHARM I/O subsystem with Key Position 1C (Address Plug #2). The part’s technical details include Manufacturer Part Number KL4501X1-BB1, brand Emerson (GE Fanuc / Fisher Rosemount), system compatibility DeltaV Electronic Marshalling, and function as an I/O module addressing device. Operating voltage is ~6.3–6.5 VDC CHARM bus power with current consumption around 2–7 mA. It operates from -40°C to +70°C and uses ISA-S71.04 Class G3 coating for environmental protection; certifications include ATEX, IECEx, and Class I Div 2 (Zone 2 suitable). Installation is plug-in with an automatic keying system; mounting integrates with a terminal baseplate. It prevents incorrect module insertion as a protective feature and is a maintenance-free, industrial-grade component designed for harsh environments. Common replacements include KL4501X1-BA1, KL4501X1-BC1, and KL4501X1-BD1.