The Allen-Bradley 1785-KA3 DH PLC-2 Interface Module is a Data Highway (DH) interface device that connects a PLC-2 controller to the DH network for standard data communications with other DH devices. It is intended for use in legacy Allen-Bradley control architectures requiring PLC-2 to DH connectivity. The model is identified by part number 1785-KA3 from Allen-Bradley.
