1771-IT

The Allen-Bradley/Rockwell Automation 1771-IT module is an input module from the PLC 5 series and the Bulletin 1771 product line. It is specifically a fast-response type of input module that runs on DC power. The 1771-IT fast-response DC input module supports a very short delay time and it is well-suited for applications with devices that require or benefit from short delay times. These applications include applications in incremental encoders, DC proximity switches, and in photoelectric switches. The 1771-IT fast-response DC input module can be used along with a DC output driver module and both modules can and should use the same DC power source to make sure that their common potential levels are the same.