Description Description S205 – TB840A Modulebus Cluster Modem Optical cluster modem for 1+1 redundant operation. Related products ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE076940R1 Read more ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE042257R1 Read more ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE081637R1 Read more