Allen-Bradley 1745-PCC Converter PLC To Computer Interface

The Allen-Bradley 1745-PCC is a dedicated Personal Computer Interface Converter that facilitates direct communications between SLC 100/150 controllers and a PC, translating signals from the PLC’s RS-422 serial link to a PC’s RS-232-C port for programming, monitoring, and data exchange. Power for the unit comes from a 12/30 VDC supply (approximately 1 W), with the power wired through a pre-installed DIN connector designed for compatibility with the SLC interface converter, ensuring a compact, integrated hookup in legacy rack installations. Typical workflows with the 1745-PCC employ the historic PCIS software package to communicate with SLC 100/150 systems, enabling DOS-based programming, diagnostics, and data capture via a serial connection; some discussions note RS-422 to RS-232-C signaling and requirements for real serial ports rather than USB adapters. As part of the SLC 100 family ecosystem, the 1745-PCC supports a half-duplex data path over RS-422 to RS-232-C, and it is commonly used in older Allen-Bradley installations where PC-based tooling remains in service.