Allen-Bradley 1797-CE3S FLEX Ex I Bus Extender Cable

Allen-Bradley 1797-CE3S FLEX Ex I Bus Extender Cable is a 3-foot (0.9 m) extension for the FLEX Ex I/O bus used in hazardous locations. Part of the FLEX Ex I/O family, this cable extends the I/O bus between FLEX Ex I/O modules and a bus isolator, enabling flexible spacing and layout in purge or explosion-protected environments. The 3 ft length aligns with configurations that pair the extender with the shorter 1797-CE1S (0.3 m) extender for mixed hazardous-area installations. Rockwell Automation notes that the FLEX Ex bus extender line, including the 1797-CE3S, was discontinued after December 31, 2017; today availability is typically through distributors offering used or refurbished units. Common applications include process automation in oil and gas, chemical processing, and other facilities requiring intrinsically safe or explosion-protected I/O.