Allen-Bradley 1747-PIC Peripheral Interface Card

Allen-Bradley 1747-PIC is a SLC-500 RS-232 to DH-485 interface converter that serves as a serial bridge between a PC or other RS-232 device and a DH-485 network used by SLC-500 controllers and related panels. The unit provides an RS-232 host interface on the PC side and a DH-485/RS-485 peripheral link on the network side, enabling direct serial communication with DH-485-equipped devices such as SLC-500 CPUs and PanelView 600 HMIs. In catalog and installation literature, the 1747-PIC (also listed as 1747-PIC/A in some catalogs) is described as the RS-232-to-RS-485 interface converter for SLC-500 systems, and it is referenced within Rockwell manuals as a standard peripheral interface option for connecting serial equipment to a DH-485 network. Common use cases include configuring, monitoring, or exchanging data with SLC-500 controllers via a PC’s serial port or integrating PanelView 600 terminals that rely on DH-485 communications through this converter. The product is discussed in multiple Rockwell documentation sets and third-party listings as a dedicated RS-232–to–DH/RS-485 bridge for the SLC-500 family, with notes on compatibility considerations and legacy software workflows.