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16 inputs (DC 24 V) Digital Input Module for S7-300 - 700-321-1BH02
$ 163.00
16 outputs (DC 24V, 0.5A) Digital Output Module for S7-300 - 700-322-1BH01
$ 224.00
32 inputs (DC 24 V) Digital Input Module for S7-300 - 700-321-1BL00
$ 332.00
32 outputs (DC 24V, 0.5A) Digital Output Module for S7-300 - 700-322-1BL00
$ 448.00