The Allen Bradley module you mentioned 1734-4IOL does not exist in the Allen Bradley product line.
The Allen Bradley module you mentioned, 1734-4IOL, does not exist in the Allen Bradley product line. The correct module part number that corresponds to a digital input/output module is typically in the format "1734-IE4C" for a digital input module or "1734-OE4C" for a digital output module.
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