Allen Bradley 1794-IV16 Flex I/O Input Module Specs

Product Summary

The Allen Bradley 1794-IV16 delivers precise signal acquisition for demanding industrial control systems. This Flex I/O module processes 16 nonisolated sourcing inputs with a nominal voltage of 24V DC. It handles a wide voltage range from 10V to 31.2V DC. The module ensures reliable operation with a maximum power dissipation of just 5.7 W. It is an essential component for accurate monitoring tasks.

Expert Technical Evaluation and Performance Review

The 1794-IV16 operates as a high-impedance input module for the Flex I/O series. It features a maximum input impedance of 4.7 kΩ. This high impedance minimizes signal loading on field devices. It ensures accurate voltage sensing across all 16 channels. The module accepts sourcing inputs, which are common in modern sensor arrays. It requires a minimum on-state current of just 2.0 mA to register a valid signal. This low threshold allows it to work with a wide variety of sensors. The nominal on-state current is 8.0 mA at 24V DC. This value provides a robust and stable signal for the control system.

The voltage handling capabilities of this module are exceptionally broad. It activates at a minimum on-state voltage of 10V DC. It operates efficiently at its nominal voltage of 24V DC. It can withstand a maximum on-state voltage of 31.2V DC without damage. This wide operating window provides excellent flexibility. Engineers can use it in systems with fluctuating power supplies. The off-state characteristics are equally important for system reliability. The module guarantees an off-state for voltages above 5V DC. It requires a minimum off-state current of 1.5 mA to ensure a clear off signal. This clear distinction between on and off states prevents false readings.

Signal integrity remains a top priority for industrial automation. The 1794-IV16 limits power dissipation to 5.7 W at maximum voltage. This low heat generation enhances the module's long-term stability. It also reduces thermal stress on neighboring components in the cabinet. The module is designed for seamless integration with the 1794-TB3 terminal base unit. This base unit provides robust screw clamp connections for secure wiring. The combination ensures a reliable physical and electrical connection.

Product Procurement and Buyer Guide

When procuring the 1794-IV16, you must consider your specific input requirements. This module offers 16 nonisolated sourcing inputs. Nonisolated design reduces cost and simplifies wiring for common-ground systems. It is ideal for applications where all inputs share a common reference point. You must confirm your sensors are sourcing type, meaning they provide positive voltage. This module does not support sinking inputs. Verify your sensor output voltage falls within the 10V to 31.2V DC range. This ensures reliable switching and prevents module damage.

The module connects directly to the 1794-TB3 terminal base. The terminal base supplies power and handles the backplane communication. You must order the terminal base separately if you need one. The 1794-TB3 can daisy-chain power to other adjacent modules. This feature simplifies wiring in multi-module systems. The module draws its operating power from the backplane. It uses 640 mA at 5V DC from the terminal base. Plan your overall system power budget accordingly. This module is a standard part of the Rockwell Automation Flex I/O family. It offers a reliable balance of performance, density, and cost.