Allen-Bradley 1771-NBV1 High Resolution Isolated Analog Input Module

The Allen-Bradley 1771-NBV1 is a high‑resolution isolated analog combination module for the PLC‑5 1771 I/O system, delivering six analog input channels and two analog output channels in a single module. Each input channel accepts voltage up to ±10.5 V or current from 0 to 21 mA, with 16‑bit resolution (unipolar) for both voltage (330 µV/bit) and current (330 nA/bit) signals, while the two outputs provide ±10.5 V DC with 14‑bit resolution (1.32 mV/bit) and a maximum update time of 25 ms. The module provides isolation between field I/O and the backplane, enabling precise, compact analog sensing and control in noisy industrial environments.