Allen-Bradley 1771-NIV Isolated Analog Input Module

Allen-Bradley 1771-NIV is a high-resolution isolated analog input module for the PLC-5 1771 I/O series. It provides eight isolated input channels that can accept voltage signals in the ±5 V range or current signals up to ±20 mA, enabling precise sensing from a variety of field devices while maintaining galvanic isolation from the controller. The inputs are isolated from the backplane and from each other to minimize ground loops and electrical noise in demanding industrial environments. Designed for PLC-5 remote I/O configurations, the 1771-NIV plugs into the 1771 I/O backplane and supports the standard data interface used by the PLC-5 family. Typical applications include monitoring low-level sensor outputs and process signals where robust isolation improves measurement reliability in industrial automation contexts. The 1771-NIV is part of Allen-Bradley’s 1771-N Series high-resolution analog modules, offering reliable interpretation of analog signals from sensors and transducers connected to PLC-5 control systems.