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ABB CI840A PROFIBUS DP-V1 communication interface module for the S800 I/O system.
ABB CI840A PROFIBUS DP-V1 redundant communication interface module for the S800 I/O system. Order code 3BSE041882R1.
ABB CI840A-1 PROFIBUS DP-V1 communication interface module for the S800 I/O system, supporting 1+1 redundant operation with TU846 or TU847 termination units. Order code 3BSE041883R1.
ABB CI840A-eA PROFIBUS DP-V1 communication interface module for the S800 I/O system, designed for 1+1 redundant operation.