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The Allen-Bradley 1771-DA PLC 5 ASCI I/O Module is designed to facilitate data transfer from ASCII devices to a programmable controller via RS-232-C and A-B Long line interfacing, operating on the I/O chassis of the 1771 Chassis. With flexible communication rates ranging from 110 to 9600 Bauds, it provides robust data handling through a 1.5K word buffer memory and is powered by a 1.3A backplane current. The module ensures reliable communication with 500V DC voltage isolation, employs both passive and active current loop circuits for signal integrity, and accommodates various voltage thresholds for secure data exchange.