Allen-Bradley 1769-ASCII Communication Module

Allen-Bradley 1769-ASCII Compact I/O ASCII Communication Module provides two RS-232 serial channels that connect a CompactLogix backplane to ASCII devices, enabling straightforward serial data exchange within a 1769 I/O chassis. The module uses two DB-9 serial ports (male) for direct connections to external equipment such as printers, barcode readers, or test instruments, and its serial input voltage range is 3 to 25 VDC with respect to signal ground (SG) when the port is asserted. Designed as a dedicated ASCII communication interface in the CompactLogix family, it sits in the 1769 backplane and communicates with the controller over the backplane bus, freeing up discrete I/O for other tasks. Typical applications include data collection from serial instruments, status reporting to ASCII terminals, and integration of legacy devices that communicate via ASCII protocols, all within a factory automation or industrial control environment. The 1769-ASCII module is a two-channel interface option within the CompactLogix 1769 module lineup, offering reliable, point-to-point ASCII communications for multiple devices from a single module.