Allen-Bradley 1770-RD2 Remote Driver Module PLC-2 RS-232

The Allen-Bradley 1770-RD2 Remote Driver Module is a stand-alone RS-232-C interface designed for PLC-2 systems, providing a dedicated serial connection to external equipment. It operates from a 5 VDC supply and typically draws about 1 A, making it a compact addition to legacy automation racks. As a PLC-2/RS-232C remote driver, the 1770-RD2 enables serial communications between the PLC-2 controller and peripheral devices such as host terminals or other RS-232 serial equipment, expanding the controller’s data transfer capabilities beyond local I/O. This module is installed as a separate remote driver unit within a PLC-2 environment, and it is sold as a standalone remote driver module for RS-232 communications. In vintage Allen-Bradley installations, the 1770-RD2 frequently serves as the bridge between PLC-2 logic and external serial devices, supporting remote data exchange and simple command interfaces over RS-232-C.