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The I-7188XG series (I-7188XG, I-7188XGD) is a palm-size PAC with ISaGRAF SoftLogic. It has 2 Serial ports (COM1:RS-232/RS-485 & COM2:RS-485). The user can choose an I/O expansion board, X-Board, to expand COM Ports, I/Os or memories of I-7188XG and μPAC-7186EG Series.