The ABB DSTC 406 passive terminating unit (part number 57520001-DX) is a compact termination device used with ABB Advant Master process control systems to provide System Data Bus (SDB) termination when the DSTC452 modem sits at the end of the line. One terminating unit is required per modem, and it is specifically used when the modem is the final device in the communication chain, compatible with ABB Advant Master and Symphony Plus DCS configurations. The DSTC 406 contains a coaxial 75-ohm terminator (BNC) and is Swedish-origin with an approximate weight of 250 g.
