Allen-Bradley 1746-NIO4I Analog Combination Module

Allen-Bradley 1746-NIO4I Analog Combination Module

Description

Analog refers to the representation of numerical quantities by the measurement of continuous physical variables. Analog applications are present in many forms. The following application shows a typical use of analog.

In this application the processor controls the amount of fluid placed in a holding tank by adjusting the percentage of the valve opening. The valve is initially open 100%. As the fluid level in the tank approaches the preset point, the processor modifies the output to degrade closing the valve 90%, 80%, adjusting the valve to maintain a set point.

The NIO4I and NIO4V Analog Combination I/O modules provide two input and two output channels in a single slot module. The 1746-NIO4I module contains two current or voltage inputs (user selectable per channel), and two current outputs. The 176-NIO4V module contains two current or voltage inputs (user selectable per channel) and two voltage outputs.

Technical Specifications