Product Description Detailed Specs Downloads Reviews/Questions Product Description DATAMAX-O'NEIL, ACCESSORY, SERIAL GPIO PORT Detailed Specs MFG Part Number OPT78-2985-02 Product Type Accessory null null null null null null null null null null Downloads Reviews/Questions The Honeywell OPT78-2985-02 is also known as HON -OPT78298502 or OPT78298502