1746-A13, SLC500 13-Slot Rack, Ser B x 1 Piece. 1747-L542, SLC500 Processor Unit, Ser B Proc. Rev 3 x 1 Piece. 1746-NI4, SLC500 Analog Input Module, Ser A x 4 Pieces. 1746-IA16, SLC500 Input Module, Ser C x 3 Pieces.
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