1771-DA | Allen-Bradley PLC-5 ASCII I/O Module, 1.5K words/3K bytes, RS-232-C

Description 

Allen Bradley PLC 5 ASCII I/O Module, 1.5 Kilowords/3 Kilobytes, RS-232-C, 110, 300, 600, 1200, 4800, 9600 baud Rate of Communication

Technical Specifications 

Information About 1771-DA

The 1771-DA PLC 5 ASCI I/O Module by Allen-Bradley is a module which allows for the transfer of data by means of an I/O scan from ASCII devices to a programmable controller processor data table with the expandable data table and block transferability. The 1771-DA provides an interface via the RS-232-C 200mA current loop and the A-B Long line and has a user selectable communication rates of 110, 300, 600, 1200, 2400, 4800, and 9600 Bauds. The 1771-DA is located on the I/O chassis of the 1771 Chassis, and it draws a backplane current of 1.3A. It has a buffer memory of 1.5K words and keying of the module is by connecting the top connector between pin 8 and 10 or between 30 and 32. 

The current loop uses a passive receiver circuit with 4-20mA input current range at a nominal voltage of 1.5-2.05V DC and a reverse voltage limit of 5V DC. The 1771-DA also uses the active transmitter circuit with an input rating of 23mA and a passive transmitter circuit with an input rating of 55mA current at 2.25 nominal voltage with a reverse voltage of 2.7V DC across pins 11 and 18. The current loop interface provides 500V DC voltage isolation between users and the programmable controller circuitry system. The RS-232-C has a receiver circuit control with a rating of 3-25V DC input voltage with an input impedance of 3-7 KiloOhms, and a transmitter circuit with a rating of 5-15V DC for space state and -5 to -15V DC for mark state and it also provides voltage isolation with the same parameters as the current loop interface.

Manufacturer information

Allen‑Bradley components, integrated control and information solutions are built for demanding industrial applications. We integrate control and information across the enterprise to make you as productive as possible.

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