Product Overview

The Allen-Bradley 1746-NO8V/A​ is an 8-channel, voltage-output analog output module designed for the Allen-Bradley SLC 500 programmable controller system. This module serves as a critical interface that translates digital control signals from the SLC processor into precise analog voltage signals used to command and regulate field devices. It occupies a single slot in a 1746 I/O chassis and provides eight independent output channels, each capable of generating a configurable voltage signal, typically in the industry-standard 0 to 10V DC range. The Allen-Bradley 1746-NO8V/A​ is engineered to control a wide array of analog actuators, including variable frequency drive (VFD) speed references, proportional valve positioners, analog chart recorders, and process controllers. Its function is to close the control loop by delivering the precise analog command signal calculated by the PLC’s logic or PID algorithm, enabling continuous modulation of speed, position, flow, or other process variables.As a key component in the SLC 500 I/O family, the 1746-NO8V/A​ provides a high-density, cost-effective solution for applications requiring multiple analog control outputs. Each channel is independently configurable via the controller’s programming software (such as RSLogix 500), allowing for different output ranges and data formats to match the requirements of the connected device. The module receives digital data words from the SLC processor over the chassis backplane, performs digital-to-analog conversion (DAC) with high resolution, and outputs a stable, low-noise voltage signal. The “/A” suffix often denotes a specific hardware revision or a standard product version. The design of the Allen-Bradley 1746-NO8V/A​ emphasizes accuracy and stability, incorporating features to minimize the impact of electrical noise commonly found in industrial environments. By providing reliable analog command signals, this module enables the SLC 500 platform to perform sophisticated closed-loop control tasks in process industries, machine control, and building automation, extending the utility of this versatile controller beyond simple discrete logic.

Technical Specifications