Siemens S7 1200 CM1241 Serial RS-232 Module - for S7 PLC

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NEW Unopened AB 1734-232ASC Point IO RS232 ASCII Serial Module

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New Allen-Bradley 1734-232ASC Point IO RS232 ASCII Serial Module AB1734232ASC

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MOXA Serial Controller card CP-104EL - RS232 / 422 /485 4-Port PCIe -X1 3-Row